Backport selected refinements from the nullability efforts

Issue: SPR-15656

spring-aop/src/main/java/org/springframework/aop/TargetSource.java

@@ -1,5 +1,5 @@
 /*<
- * Copyright 2002-2012 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -34,9 +34,8 @@ public interface TargetSource extends TargetClassAware {
 
 	/**
 	 * Return the type of targets returned by this {@link TargetSource}.
-	 * <p>Can return {@code null}, although certain usages of a
-	 * {@code TargetSource} might just work with a predetermined
-	 * target class.
+	 * <p>Can return {@code null}, although certain usages of a {@code TargetSource}
+	 * might just work with a predetermined target class.
 	 * @return the type of targets returned by this {@link TargetSource}
 	 */
 	@Override
@@ -44,9 +43,8 @@ public interface TargetSource extends TargetClassAware {
 
 	/**
 	 * Will all calls to {@link #getTarget()} return the same object?
-	 * <p>In that case, there will be no need to invoke
-	 * {@link #releaseTarget(Object)}, and the AOP framework can cache
-	 * the return value of {@link #getTarget()}.
+	 * <p>In that case, there will be no need to invoke {@link #releaseTarget(Object)},
+	 * and the AOP framework can cache the return value of {@link #getTarget()}.
 	 * @return {@code true} if the target is immutable
 	 * @see #getTarget
 	 */
@@ -55,14 +53,15 @@ public interface TargetSource extends TargetClassAware {
 	/**
 	 * Return a target instance. Invoked immediately before the
 	 * AOP framework calls the "target" of an AOP method invocation.
-	 * @return the target object, which contains the joinpoint
+	 * @return the target object which contains the joinpoint,
+	 * or {@code null} if there is no actual target instance
 	 * @throws Exception if the target object can't be resolved
 	 */
 	Object getTarget() throws Exception;
 
 	/**
 	 * Release the given target object obtained from the
-	 * {@link #getTarget()} method.
+	 * {@link #getTarget()} method, if any.
 	 * @param target object obtained from a call to {@link #getTarget()}
 	 * @throws Exception if the object can't be released
 	 */

spring-aop/src/main/java/org/springframework/aop/aspectj/AbstractAspectJAdvice.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2015 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -103,8 +103,8 @@ public abstract class AbstractAspectJAdvice implements Advice, AspectJPrecedence
 	private final AspectInstanceFactory aspectInstanceFactory;
 
 	/**
-	 * The name of the aspect (ref bean) in which this advice was defined (used
-	 * when determining advice precedence so that we can determine
+	 * The name of the aspect (ref bean) in which this advice was defined
+	 * (used when determining advice precedence so that we can determine
 	 * whether two pieces of advice come from the same aspect).
 	 */
 	private String aspectName;
@@ -118,13 +118,13 @@ public abstract class AbstractAspectJAdvice implements Advice, AspectJPrecedence
 	 * This will be non-null if the creator of this advice object knows the argument names
 	 * and sets them explicitly
 	 */
-	private String[] argumentNames = null;
+	private String[] argumentNames;
 
 	/** Non-null if after throwing advice binds the thrown value */
-	private String throwingName = null;
+	private String throwingName;
 
 	/** Non-null if after returning advice binds the return value */
-	private String returningName = null;
+	private String returningName;
 
 	private Class<?> discoveredReturningType = Object.class;
 
@@ -295,8 +295,8 @@ public abstract class AbstractAspectJAdvice implements Advice, AspectJPrecedence
 			}
 			catch (Throwable ex) {
 				throw new IllegalArgumentException("Returning name '" + name  +
-						"' is neither a valid argument name nor the fully-qualified name of a Java type on the classpath. " +
-						"Root cause: " + ex);
+						"' is neither a valid argument name nor the fully-qualified " +
+						"name of a Java type on the classpath. Root cause: " + ex);
 			}
 		}
 	}
@@ -329,8 +329,8 @@ public abstract class AbstractAspectJAdvice implements Advice, AspectJPrecedence
 			}
 			catch (Throwable ex) {
 				throw new IllegalArgumentException("Throwing name '" + name  +
-						"' is neither a valid argument name nor the fully-qualified name of a Java type on the classpath. " +
-						"Root cause: " + ex);
+						"' is neither a valid argument name nor the fully-qualified " +
+						"name of a Java type on the classpath. Root cause: " + ex);
 			}
 		}
 	}

spring-aop/src/main/java/org/springframework/aop/aspectj/AspectJAdviceParameterNameDiscoverer.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2012 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -113,6 +113,7 @@ import org.springframework.util.StringUtils;
  * returning {@code null} in the case that the parameter names cannot be discovered.
  *
  * @author Adrian Colyer
+ * @author Juergen Hoeller
  * @since 2.0
  */
 public class AspectJAdviceParameterNameDiscoverer implements ParameterNameDiscoverer {
@@ -154,23 +155,17 @@ public class AspectJAdviceParameterNameDiscoverer implements ParameterNameDiscov
 	}
 
 
+	/** The pointcut expression associated with the advice, as a simple String */
+	private String pointcutExpression;
+
 	private boolean raiseExceptions;
 
-	/**
-	 * If the advice is afterReturning, and binds the return value, this is the parameter name used.
-	 */
+	/** If the advice is afterReturning, and binds the return value, this is the parameter name used */
 	private String returningName;
 
-	/**
-	 * If the advice is afterThrowing, and binds the thrown value, this is the parameter name used.
-	 */
+	/** If the advice is afterThrowing, and binds the thrown value, this is the parameter name used */
 	private String throwingName;
 
-	/**
-	 * The pointcut expression associated with the advice, as a simple String.
-	 */
-	private String pointcutExpression;
-
 	private Class<?>[] argumentTypes;
 
 	private String[] parameterNameBindings;
@@ -186,6 +181,7 @@ public class AspectJAdviceParameterNameDiscoverer implements ParameterNameDiscov
 		this.pointcutExpression = pointcutExpression;
 	}
 
+
 	/**
 	 * Indicate whether {@link IllegalArgumentException} and {@link AmbiguousBindingException}
 	 * must be thrown as appropriate in the case of failing to deduce advice parameter names.
@@ -213,6 +209,7 @@ public class AspectJAdviceParameterNameDiscoverer implements ParameterNameDiscov
 		this.throwingName = throwingName;
 	}
 
+
 	/**
 	 * Deduce the parameter names for an advice method.
 	 * <p>See the {@link AspectJAdviceParameterNameDiscoverer class level javadoc}
@@ -474,7 +471,7 @@ public class AspectJAdviceParameterNameDiscoverer implements ParameterNameDiscov
 	 * If the token starts meets Java identifier conventions, it's in.
 	 */
 	private String maybeExtractVariableName(String candidateToken) {
-		if (candidateToken == null || candidateToken.equals("")) {
+		if (!StringUtils.hasLength(candidateToken)) {
 			return null;
 		}
 		if (Character.isJavaIdentifierStart(candidateToken.charAt(0)) &&

spring-aop/src/main/java/org/springframework/aop/framework/autoproxy/AbstractAutoProxyCreator.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2016 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -454,10 +454,7 @@ public abstract class AbstractAutoProxyCreator extends ProxyProcessorSupport
 		}
 
 		Advisor[] advisors = buildAdvisors(beanName, specificInterceptors);
-		for (Advisor advisor : advisors) {
-			proxyFactory.addAdvisor(advisor);
-		}
-
+		proxyFactory.addAdvisors(advisors);
 		proxyFactory.setTargetSource(targetSource);
 		customizeProxyFactory(proxyFactory);
 

spring-aop/src/main/java/org/springframework/aop/support/ComposablePointcut.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2013 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -22,7 +22,6 @@ import org.springframework.aop.ClassFilter;
 import org.springframework.aop.MethodMatcher;
 import org.springframework.aop.Pointcut;
 import org.springframework.util.Assert;
-import org.springframework.util.ObjectUtils;
 
 /**
  * Convenient class for building up pointcuts. All methods return
@@ -188,21 +187,14 @@ public class ComposablePointcut implements Pointcut, Serializable {
 		if (!(other instanceof ComposablePointcut)) {
 			return false;
 		}
-		ComposablePointcut that = (ComposablePointcut) other;
-		return ObjectUtils.nullSafeEquals(that.classFilter, this.classFilter) &&
-				ObjectUtils.nullSafeEquals(that.methodMatcher, this.methodMatcher);
+		ComposablePointcut otherPointcut = (ComposablePointcut) other;
+		return (this.classFilter.equals(otherPointcut.classFilter) &&
+				this.methodMatcher.equals(otherPointcut.methodMatcher));
 	}
 
 	@Override
 	public int hashCode() {
-		int code = 17;
-		if (this.classFilter != null) {
-			code = 37 * code + this.classFilter.hashCode();
-		}
-		if (this.methodMatcher != null) {
-			code = 37 * code + this.methodMatcher.hashCode();
-		}
-		return code;
+		return this.classFilter.hashCode() * 37 + this.methodMatcher.hashCode();
 	}
 
 	@Override

spring-aop/src/main/java/org/springframework/aop/support/NameMatchMethodPointcut.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2014 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

spring-aop/src/main/java/org/springframework/aop/support/annotation/AnnotationMatchingPointcut.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2013 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -22,7 +22,6 @@ import org.springframework.aop.ClassFilter;
 import org.springframework.aop.MethodMatcher;
 import org.springframework.aop.Pointcut;
 import org.springframework.util.Assert;
-import org.springframework.util.ObjectUtils;
 
 /**
  * Simple Pointcut that looks for a specific Java 5 annotation
@@ -46,16 +45,15 @@ public class AnnotationMatchingPointcut implements Pointcut {
 	 * @param classAnnotationType the annotation type to look for at the class level
 	 */
 	public AnnotationMatchingPointcut(Class<? extends Annotation> classAnnotationType) {
-		this.classFilter = new AnnotationClassFilter(classAnnotationType);
-		this.methodMatcher = MethodMatcher.TRUE;
+		this(classAnnotationType, false);
 	}
 
 	/**
 	 * Create a new AnnotationMatchingPointcut for the given annotation type.
 	 * @param classAnnotationType the annotation type to look for at the class level
-	 * @param checkInherited whether to explicitly check the superclasses and
-	 * interfaces for the annotation type as well (even if the annotation type
-	 * is not marked as inherited itself)
+	 * @param checkInherited whether to also check the superclasses and interfaces
+	 * as well as meta-annotations for the annotation type
+	 * @see AnnotationClassFilter#AnnotationClassFilter(Class, boolean)
 	 */
 	public AnnotationMatchingPointcut(Class<? extends Annotation> classAnnotationType, boolean checkInherited) {
 		this.classFilter = new AnnotationClassFilter(classAnnotationType, checkInherited);
@@ -109,21 +107,14 @@ public class AnnotationMatchingPointcut implements Pointcut {
 		if (!(other instanceof AnnotationMatchingPointcut)) {
 			return false;
 		}
-		AnnotationMatchingPointcut that = (AnnotationMatchingPointcut) other;
-		return ObjectUtils.nullSafeEquals(that.classFilter, this.classFilter) &&
-				ObjectUtils.nullSafeEquals(that.methodMatcher, this.methodMatcher);
+		AnnotationMatchingPointcut otherPointcut = (AnnotationMatchingPointcut) other;
+		return (this.classFilter.equals(otherPointcut.classFilter) &&
+				this.methodMatcher.equals(otherPointcut.methodMatcher));
 	}
 
 	@Override
 	public int hashCode() {
-		int code = 17;
-		if (this.classFilter != null) {
-			code = 37 * code + this.classFilter.hashCode();
-		}
-		if (this.methodMatcher != null) {
-			code = 37 * code + this.methodMatcher.hashCode();
-		}
-		return code;
+		return this.classFilter.hashCode() * 37 + this.methodMatcher.hashCode();
 	}
 
 	@Override

spring-beans/src/main/java/org/springframework/beans/PropertyAccessor.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2016 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -81,8 +81,6 @@ public interface PropertyAccessor {
 	 * (may be a nested path and/or an indexed/mapped property)
 	 * @return the property type for the particular property,
 	 * or {@code null} if not determinable
-	 * @throws InvalidPropertyException if there is no such property or
-	 * if the property isn't readable
 	 * @throws PropertyAccessException if the property was valid but the
 	 * accessor method failed
 	 */
@@ -95,8 +93,8 @@ public interface PropertyAccessor {
 	 * (may be a nested path and/or an indexed/mapped property)
 	 * @return the property type for the particular property,
 	 * or {@code null} if not determinable
-	 * @throws InvalidPropertyException if there is no such property or
-	 * if the property isn't readable
+	 * @throws PropertyAccessException if the property was valid but the
+	 * accessor method failed
 	 */
 	TypeDescriptor getPropertyTypeDescriptor(String propertyName) throws BeansException;
 

spring-beans/src/main/java/org/springframework/beans/factory/BeanFactory.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2016 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -158,6 +158,22 @@ public interface BeanFactory {
 	 */
 	<T> T getBean(String name, Class<T> requiredType) throws BeansException;
 
+	/**
+	 * Return an instance, which may be shared or independent, of the specified bean.
+	 * <p>Allows for specifying explicit constructor arguments / factory method arguments,
+	 * overriding the specified default arguments (if any) in the bean definition.
+	 * @param name the name of the bean to retrieve
+	 * @param args arguments to use when creating a bean instance using explicit arguments
+	 * (only applied when creating a new instance as opposed to retrieving an existing one)
+	 * @return an instance of the bean
+	 * @throws NoSuchBeanDefinitionException if there is no such bean definition
+	 * @throws BeanDefinitionStoreException if arguments have been given but
+	 * the affected bean isn't a prototype
+	 * @throws BeansException if the bean could not be created
+	 * @since 2.5
+	 */
+	Object getBean(String name, Object... args) throws BeansException;
+
 	/**
 	 * Return the bean instance that uniquely matches the given object type, if any.
 	 * <p>This method goes into {@link ListableBeanFactory} by-type lookup territory
@@ -175,22 +191,6 @@ public interface BeanFactory {
 	 */
 	<T> T getBean(Class<T> requiredType) throws BeansException;
 
-	/**
-	 * Return an instance, which may be shared or independent, of the specified bean.
-	 * <p>Allows for specifying explicit constructor arguments / factory method arguments,
-	 * overriding the specified default arguments (if any) in the bean definition.
-	 * @param name the name of the bean to retrieve
-	 * @param args arguments to use when creating a bean instance using explicit arguments
-	 * (only applied when creating a new instance as opposed to retrieving an existing one)
-	 * @return an instance of the bean
-	 * @throws NoSuchBeanDefinitionException if there is no such bean definition
-	 * @throws BeanDefinitionStoreException if arguments have been given but
-	 * the affected bean isn't a prototype
-	 * @throws BeansException if the bean could not be created
-	 * @since 2.5
-	 */
-	Object getBean(String name, Object... args) throws BeansException;
-
 	/**
 	 * Return an instance, which may be shared or independent, of the specified bean.
 	 * <p>Allows for specifying explicit constructor arguments / factory method arguments,

spring-beans/src/main/java/org/springframework/beans/factory/config/ServiceLocatorFactoryBean.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2015 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -281,15 +281,15 @@ public class ServiceLocatorFactoryBean implements FactoryBean<Object>, BeanFacto
 	@SuppressWarnings("unchecked")
 	protected Constructor<Exception> determineServiceLocatorExceptionConstructor(Class<? extends Exception> exceptionClass) {
 		try {
-			return (Constructor<Exception>) exceptionClass.getConstructor(new Class<?>[] {String.class, Throwable.class});
+			return (Constructor<Exception>) exceptionClass.getConstructor(String.class, Throwable.class);
 		}
 		catch (NoSuchMethodException ex) {
 			try {
-				return (Constructor<Exception>) exceptionClass.getConstructor(new Class<?>[] {Throwable.class});
+				return (Constructor<Exception>) exceptionClass.getConstructor(Throwable.class);
 			}
 			catch (NoSuchMethodException ex2) {
 				try {
-					return (Constructor<Exception>) exceptionClass.getConstructor(new Class<?>[] {String.class});
+					return (Constructor<Exception>) exceptionClass.getConstructor(String.class);
 				}
 				catch (NoSuchMethodException ex3) {
 					throw new IllegalArgumentException(
@@ -357,7 +357,7 @@ public class ServiceLocatorFactoryBean implements FactoryBean<Object>, BeanFacto
 				return System.identityHashCode(proxy);
 			}
 			else if (ReflectionUtils.isToStringMethod(method)) {
-				return "Service locator: " + serviceLocatorInterface.getName();
+				return "Service locator: " + serviceLocatorInterface;
 			}
 			else {
 				return invokeServiceLocatorMethod(method, args);

spring-beans/src/main/java/org/springframework/beans/factory/parsing/ReaderContext.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2007 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -37,6 +37,13 @@ public class ReaderContext {
 	private final SourceExtractor sourceExtractor;
 
 
+	/**
+	 * Construct a new {@code ReaderContext}.
+	 * @param resource the XML bean definition resource
+	 * @param problemReporter the problem reporter in use
+	 * @param eventListener the event listener in use
+	 * @param sourceExtractor the source extractor in use
+	 */
 	public ReaderContext(Resource resource, ProblemReporter problemReporter,
 			ReaderEventListener eventListener, SourceExtractor sourceExtractor) {
 
@@ -51,83 +58,150 @@ public class ReaderContext {
 	}
 
 
+	// Errors and warnings
+
+	/**
+	 * Raise a fatal error.
+	 */
 	public void fatal(String message, Object source) {
 		fatal(message, source, null, null);
 	}
 
+	/**
+	 * Raise a fatal error.
+	 */
 	public void fatal(String message, Object source, Throwable ex) {
 		fatal(message, source, null, ex);
 	}
 
+	/**
+	 * Raise a fatal error.
+	 */
 	public void fatal(String message, Object source, ParseState parseState) {
 		fatal(message, source, parseState, null);
 	}
 
+	/**
+	 * Raise a fatal error.
+	 */
 	public void fatal(String message, Object source, ParseState parseState, Throwable cause) {
 		Location location = new Location(getResource(), source);
 		this.problemReporter.fatal(new Problem(message, location, parseState, cause));
 	}
 
+	/**
+	 * Raise a regular error.
+	 */
 	public void error(String message, Object source) {
 		error(message, source, null, null);
 	}
 
+	/**
+	 * Raise a regular error.
+	 */
 	public void error(String message, Object source, Throwable ex) {
 		error(message, source, null, ex);
 	}
 
+	/**
+	 * Raise a regular error.
+	 */
 	public void error(String message, Object source, ParseState parseState) {
 		error(message, source, parseState, null);
 	}
 
+	/**
+	 * Raise a regular error.
+	 */
 	public void error(String message, Object source, ParseState parseState, Throwable cause) {
 		Location location = new Location(getResource(), source);
 		this.problemReporter.error(new Problem(message, location, parseState, cause));
 	}
 
+	/**
+	 * Raise a non-critical warning.
+	 */
 	public void warning(String message, Object source) {
 		warning(message, source, null, null);
 	}
 
+	/**
+	 * Raise a non-critical warning.
+	 */
 	public void warning(String message, Object source, Throwable ex) {
 		warning(message, source, null, ex);
 	}
 
+	/**
+	 * Raise a non-critical warning.
+	 */
 	public void warning(String message, Object source, ParseState parseState) {
 		warning(message, source, parseState, null);
 	}
 
+	/**
+	 * Raise a non-critical warning.
+	 */
 	public void warning(String message, Object source, ParseState parseState, Throwable cause) {
 		Location location = new Location(getResource(), source);
 		this.problemReporter.warning(new Problem(message, location, parseState, cause));
 	}
 
 
+	// Explicit parse events
+
+	/**
+	 * Fire an defaults-registered event.
+	 */
 	public void fireDefaultsRegistered(DefaultsDefinition defaultsDefinition) {
 		this.eventListener.defaultsRegistered(defaultsDefinition);
 	}
 
+	/**
+	 * Fire an component-registered event.
+	 */
 	public void fireComponentRegistered(ComponentDefinition componentDefinition) {
 		this.eventListener.componentRegistered(componentDefinition);
 	}
 
+	/**
+	 * Fire an alias-registered event.
+	 */
 	public void fireAliasRegistered(String beanName, String alias, Object source) {
 		this.eventListener.aliasRegistered(new AliasDefinition(beanName, alias, source));
 	}
 
+	/**
+	 * Fire an import-processed event.
+	 */
 	public void fireImportProcessed(String importedResource, Object source) {
 		this.eventListener.importProcessed(new ImportDefinition(importedResource, source));
 	}
 
+	/**
+	 * Fire an import-processed event.
+	 */
 	public void fireImportProcessed(String importedResource, Resource[] actualResources, Object source) {
 		this.eventListener.importProcessed(new ImportDefinition(importedResource, actualResources, source));
 	}
 
 
+	// Source extraction
+
+	/**
+	 * Return the source extractor in use.
+	 */
 	public SourceExtractor getSourceExtractor() {
 		return this.sourceExtractor;
 	}
 
+	/**
+	 * Call the source extractor for the given source object.
+	 * @param sourceCandidate the original source object
+	 * @return the source object to store, or {@code null} for none.
+	 * @see #getSourceExtractor()
+	 * @see SourceExtractor#extractSource
+	 */
 	public Object extractSource(Object sourceCandidate) {
 		return this.sourceExtractor.extractSource(sourceCandidate, this.resource);
 	}

spring-beans/src/main/java/org/springframework/beans/factory/support/BeanDefinitionDefaults.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2012 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -62,7 +62,7 @@ public class BeanDefinitionDefaults {
 	}
 
 	public void setInitMethodName(String initMethodName) {
-		this.initMethodName = (StringUtils.hasText(initMethodName)) ? initMethodName : null;
+		this.initMethodName = (StringUtils.hasText(initMethodName) ? initMethodName : null);
 	}
 
 	public String getInitMethodName() {
@@ -70,7 +70,7 @@ public class BeanDefinitionDefaults {
 	}
 
 	public void setDestroyMethodName(String destroyMethodName) {
-		this.destroyMethodName = (StringUtils.hasText(destroyMethodName)) ? destroyMethodName : null;
+		this.destroyMethodName = (StringUtils.hasText(destroyMethodName) ? destroyMethodName : null);
 	}
 
 	public String getDestroyMethodName() {

spring-beans/src/main/java/org/springframework/beans/propertyeditors/ResourceBundleEditor.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2015 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -96,8 +96,7 @@ public class ResourceBundleEditor extends PropertyEditorSupport {
 			}
 			String localeString = name.substring(separator + 1);
 			Locale locale = StringUtils.parseLocaleString(localeString);
-			setValue((StringUtils.hasText(localeString)) ? ResourceBundle.getBundle(baseName, locale) :
-					ResourceBundle.getBundle(baseName));
+			setValue(locale != null ? ResourceBundle.getBundle(baseName, locale) : ResourceBundle.getBundle(baseName));
 		}
 	}
 

spring-context-support/src/main/java/org/springframework/cache/jcache/JCacheCache.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2015 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -110,8 +110,7 @@ public class JCacheCache extends AbstractValueAdaptingCache {
 
 		@SuppressWarnings("unchecked")
 		@Override
-		public T process(MutableEntry<Object, Object> entry, Object... arguments)
-				throws EntryProcessorException {
+		public T process(MutableEntry<Object, Object> entry, Object... arguments) throws EntryProcessorException {
 			Callable<T> valueLoader = (Callable<T>) arguments[0];
 			if (entry.exists()) {
 				return (T) fromStoreValue(entry.getValue());

spring-context-support/src/main/java/org/springframework/cache/jcache/interceptor/JCacheAspectSupport.java

@@ -94,7 +94,7 @@ public class JCacheAspectSupport extends AbstractCacheInvoker implements Initial
 	protected Object execute(CacheOperationInvoker invoker, Object target, Method method, Object[] args) {
 		// Check whether aspect is enabled to cope with cases where the AJ is pulled in automatically
 		if (this.initialized) {
-			Class<?> targetClass = getTargetClass(target);
+			Class<?> targetClass = AopProxyUtils.ultimateTargetClass(target);
 			JCacheOperation<?> operation = getCacheOperationSource().getCacheOperation(method, targetClass);
 			if (operation != null) {
 				CacheOperationInvocationContext<?> context =
@@ -114,14 +114,6 @@ public class JCacheAspectSupport extends AbstractCacheInvoker implements Initial
 				(JCacheOperation<Annotation>) operation, target, args);
 	}
 
-	private Class<?> getTargetClass(Object target) {
-		Class<?> targetClass = AopProxyUtils.ultimateTargetClass(target);
-		if (targetClass == null && target != null) {
-			targetClass = target.getClass();
-		}
-		return targetClass;
-	}
-
 	@SuppressWarnings("unchecked")
 	private Object execute(CacheOperationInvocationContext<?> context, CacheOperationInvoker invoker) {
 		CacheOperationInvoker adapter = new CacheOperationInvokerAdapter(invoker);

spring-context-support/src/main/java/org/springframework/mail/MailMessage.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2005 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -35,26 +35,26 @@ import java.util.Date;
  */
 public interface MailMessage {
 
-	public void setFrom(String from) throws MailParseException;
+	void setFrom(String from) throws MailParseException;
 
-	public void setReplyTo(String replyTo) throws MailParseException;
+	void setReplyTo(String replyTo) throws MailParseException;
 
-	public void setTo(String to) throws MailParseException;
+	void setTo(String to) throws MailParseException;
 
-	public void setTo(String[] to) throws MailParseException;
+	void setTo(String[] to) throws MailParseException;
 
-	public void setCc(String cc) throws MailParseException;
+	void setCc(String cc) throws MailParseException;
 
-	public void setCc(String[] cc) throws MailParseException;
+	void setCc(String[] cc) throws MailParseException;
 
-	public void setBcc(String bcc) throws MailParseException;
+	void setBcc(String bcc) throws MailParseException;
 
-	public void setBcc(String[] bcc) throws MailParseException;
+	void setBcc(String[] bcc) throws MailParseException;
 
-	public void setSentDate(Date sentDate) throws MailParseException;
+	void setSentDate(Date sentDate) throws MailParseException;
 
-	public void setSubject(String subject) throws MailParseException;
+	void setSubject(String subject) throws MailParseException;
 
-	public void setText(String text) throws MailParseException;
+	void setText(String text) throws MailParseException;
 
 }

spring-context-support/src/main/java/org/springframework/mail/SimpleMailMessage.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2012 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -68,10 +68,9 @@ public class SimpleMailMessage implements MailMessage, Serializable {
 	/**
 	 * Copy constructor for creating a new {@code SimpleMailMessage} from the state
 	 * of an existing {@code SimpleMailMessage} instance.
-	 * @throws IllegalArgumentException if the supplied message is {@code null}
 	 */
 	public SimpleMailMessage(SimpleMailMessage original) {
-		Assert.notNull(original, "The 'original' message argument cannot be null");
+		Assert.notNull(original, "'original' message argument must not be null");
 		this.from = original.getFrom();
 		this.replyTo = original.getReplyTo();
 		if (original.getTo() != null) {
@@ -104,7 +103,7 @@ public class SimpleMailMessage implements MailMessage, Serializable {
 	}
 
 	public String getReplyTo() {
-		return replyTo;
+		return this.replyTo;
 	}
 
 	@Override
@@ -132,7 +131,7 @@ public class SimpleMailMessage implements MailMessage, Serializable {
 	}
 
 	public String[] getCc() {
-		return cc;
+		return this.cc;
 	}
 
 	@Override
@@ -146,7 +145,7 @@ public class SimpleMailMessage implements MailMessage, Serializable {
 	}
 
 	public String[] getBcc() {
-		return bcc;
+		return this.bcc;
 	}
 
 	@Override
@@ -155,7 +154,7 @@ public class SimpleMailMessage implements MailMessage, Serializable {
 	}
 
 	public Date getSentDate() {
-		return sentDate;
+		return this.sentDate;
 	}
 
 	@Override

spring-context/src/main/java/org/springframework/cache/config/AnnotationDrivenCacheBeanDefinitionParser.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2016 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -201,16 +201,16 @@ class AnnotationDrivenCacheBeanDefinitionParser implements BeanDefinitionParser
 
 		private static void registerCacheAdvisor(Element element, ParserContext parserContext) {
 			if (!parserContext.getRegistry().containsBeanDefinition(CacheManagementConfigUtils.JCACHE_ADVISOR_BEAN_NAME)) {
-				Object eleSource = parserContext.extractSource(element);
+				Object source = parserContext.extractSource(element);
 
 				// Create the CacheOperationSource definition.
-				BeanDefinition sourceDef = createJCacheOperationSourceBeanDefinition(element, eleSource);
+				BeanDefinition sourceDef = createJCacheOperationSourceBeanDefinition(element, source);
 				String sourceName = parserContext.getReaderContext().registerWithGeneratedName(sourceDef);
 
 				// Create the CacheInterceptor definition.
 				RootBeanDefinition interceptorDef =
 						new RootBeanDefinition("org.springframework.cache.jcache.interceptor.JCacheInterceptor");
-				interceptorDef.setSource(eleSource);
+				interceptorDef.setSource(source);
 				interceptorDef.setRole(BeanDefinition.ROLE_INFRASTRUCTURE);
 				interceptorDef.getPropertyValues().add("cacheOperationSource", new RuntimeBeanReference(sourceName));
 				parseErrorHandler(element, interceptorDef);
@@ -219,7 +219,7 @@ class AnnotationDrivenCacheBeanDefinitionParser implements BeanDefinitionParser
 				// Create the CacheAdvisor definition.
 				RootBeanDefinition advisorDef = new RootBeanDefinition(
 						"org.springframework.cache.jcache.interceptor.BeanFactoryJCacheOperationSourceAdvisor");
-				advisorDef.setSource(eleSource);
+				advisorDef.setSource(source);
 				advisorDef.setRole(BeanDefinition.ROLE_INFRASTRUCTURE);
 				advisorDef.getPropertyValues().add("cacheOperationSource", new RuntimeBeanReference(sourceName));
 				advisorDef.getPropertyValues().add("adviceBeanName", interceptorName);
@@ -228,7 +228,7 @@ class AnnotationDrivenCacheBeanDefinitionParser implements BeanDefinitionParser
 				}
 				parserContext.getRegistry().registerBeanDefinition(CacheManagementConfigUtils.JCACHE_ADVISOR_BEAN_NAME, advisorDef);
 
-				CompositeComponentDefinition compositeDef = new CompositeComponentDefinition(element.getTagName(), eleSource);
+				CompositeComponentDefinition compositeDef = new CompositeComponentDefinition(element.getTagName(), source);
 				compositeDef.addNestedComponent(new BeanComponentDefinition(sourceDef, sourceName));
 				compositeDef.addNestedComponent(new BeanComponentDefinition(interceptorDef, interceptorName));
 				compositeDef.addNestedComponent(new BeanComponentDefinition(advisorDef, CacheManagementConfigUtils.JCACHE_ADVISOR_BEAN_NAME));

spring-context/src/main/java/org/springframework/cache/config/CacheAdviceParser.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2016 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -196,7 +196,7 @@ class CacheAdviceParser extends AbstractSingleBeanDefinitionParser {
 
 		private String method;
 
-		private String[] caches = null;
+		private String[] caches;
 
 		Props(Element root) {
 			String defaultCache = root.getAttribute("cache");

spring-context/src/main/java/org/springframework/cache/interceptor/CacheAspectSupport.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2016 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -164,7 +164,6 @@ public abstract class CacheAspectSupport extends AbstractCacheInvoker
 	 * @see SimpleCacheResolver
 	 */
 	public void setCacheResolver(CacheResolver cacheResolver) {
-		Assert.notNull(cacheResolver, "CacheResolver must not be null");
 		this.cacheResolver = cacheResolver;
 	}
 

spring-context/src/main/java/org/springframework/cache/interceptor/CacheOperationExpressionEvaluator.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2016 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -140,9 +140,6 @@ class CacheOperationExpressionEvaluator extends CachedExpressionEvaluator {
 		Method targetMethod = this.targetMethodCache.get(methodKey);
 		if (targetMethod == null) {
 			targetMethod = AopUtils.getMostSpecificMethod(method, targetClass);
-			if (targetMethod == null) {
-				targetMethod = method;
-			}
 			this.targetMethodCache.put(methodKey, targetMethod);
 		}
 		return targetMethod;

spring-context/src/main/java/org/springframework/cache/interceptor/CacheProxyFactoryBean.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2010-2012 the original author or authors.
+ * Copyright 2010-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -35,6 +35,7 @@ import org.springframework.aop.support.DefaultPointcutAdvisor;
  * of the Spring reference documentation for more information.
  *
  * @author Costin Leau
+ * @author Juergen Hoeller
  * @since 3.1
  * @see org.springframework.aop.framework.ProxyFactoryBean
  * @see CacheInterceptor
@@ -44,9 +45,16 @@ public class CacheProxyFactoryBean extends AbstractSingletonProxyFactoryBean {
 
 	private final CacheInterceptor cachingInterceptor = new CacheInterceptor();
 
-	private Pointcut pointcut;
+	private Pointcut pointcut = Pointcut.TRUE;
 
 
+	/**
+	 * Set the sources used to find cache operations.
+	 */
+	public void setCacheOperationSources(CacheOperationSource... cacheOperationSources) {
+		this.cachingInterceptor.setCacheOperationSources(cacheOperationSources);
+	}
+
 	/**
 	 * Set a pointcut, i.e a bean that can cause conditional invocation
 	 * of the CacheInterceptor depending on method and attributes passed.
@@ -61,18 +69,7 @@ public class CacheProxyFactoryBean extends AbstractSingletonProxyFactoryBean {
 	@Override
 	protected Object createMainInterceptor() {
 		this.cachingInterceptor.afterPropertiesSet();
-		if (this.pointcut == null) {
-			// Rely on default pointcut.
-			throw new UnsupportedOperationException();
-		}
 		return new DefaultPointcutAdvisor(this.pointcut, this.cachingInterceptor);
 	}
 
-	/**
-	 * Set the sources used to find cache operations.
-	 */
-	public void setCacheOperationSources(CacheOperationSource... cacheOperationSources) {
-		this.cachingInterceptor.setCacheOperationSources(cacheOperationSources);
-	}
-
 }

spring-context/src/main/java/org/springframework/cache/support/NoOpCache.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2016 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -19,10 +19,10 @@ package org.springframework.cache.support;
 import java.util.concurrent.Callable;
 
 import org.springframework.cache.Cache;
+import org.springframework.util.Assert;
 
 /**
- * A no operation {@link Cache} implementation suitable
- * for disabling caching.
+ * A no operation {@link Cache} implementation suitable for disabling caching.
  *
  * <p>Will simply accept any items into the cache not actually storing them.
  *
@@ -34,20 +34,25 @@ public class NoOpCache implements Cache {
 
 	private final String name;
 
+
 	/**
 	 * Create a {@link NoOpCache} instance with the specified name
 	 * @param name the name of the cache
 	 */
 	public NoOpCache(String name) {
+		Assert.notNull(name, "Cache name must not be null");
 		this.name = name;
 	}
 
+
 	@Override
-	public void clear() {
+	public String getName() {
+		return this.name;
 	}
 
 	@Override
-	public void evict(Object key) {
+	public Object getNativeCache() {
+		return null;
 	}
 
 	@Override
@@ -71,22 +76,20 @@ public class NoOpCache implements Cache {
 	}
 
 	@Override
-	public String getName() {
-		return this.name;
+	public void put(Object key, Object value) {
 	}
 
 	@Override
-	public Object getNativeCache() {
+	public ValueWrapper putIfAbsent(Object key, Object value) {
 		return null;
 	}
 
 	@Override
-	public void put(Object key, Object value) {
+	public void evict(Object key) {
 	}
 
 	@Override
-	public ValueWrapper putIfAbsent(Object key, Object value) {
-		return null;
+	public void clear() {
 	}
 
 }

spring-context/src/main/java/org/springframework/context/annotation/ComponentScanAnnotationParser.java

@@ -66,8 +66,8 @@ class ComponentScanAnnotationParser {
 	public ComponentScanAnnotationParser(Environment environment, ResourceLoader resourceLoader,
 			BeanNameGenerator beanNameGenerator, BeanDefinitionRegistry registry) {
 
-		this.resourceLoader = resourceLoader;
 		this.environment = environment;
+		this.resourceLoader = resourceLoader;
 		this.beanNameGenerator = beanNameGenerator;
 		this.registry = registry;
 	}

spring-context/src/main/java/org/springframework/context/annotation/MBeanExportConfiguration.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2015 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -121,7 +121,7 @@ public class MBeanExportConfiguration implements ImportAware, EnvironmentAware,
 	}
 
 
-	public static enum SpecificPlatform {
+	public enum SpecificPlatform {
 
 		WEBLOGIC("weblogic.management.Helper") {
 			@Override
@@ -146,7 +146,7 @@ public class MBeanExportConfiguration implements ImportAware, EnvironmentAware,
 
 		private final String identifyingClass;
 
-		private SpecificPlatform(String identifyingClass) {
+		SpecificPlatform(String identifyingClass) {
 			this.identifyingClass = identifyingClass;
 		}
 

spring-context/src/main/java/org/springframework/context/event/EventExpressionEvaluator.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2016 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -68,8 +68,8 @@ class EventExpressionEvaluator extends CachedExpressionEvaluator {
 	public boolean condition(String conditionExpression,
 			AnnotatedElementKey elementKey, EvaluationContext evalContext) {
 
-		return getExpression(this.conditionCache, elementKey, conditionExpression)
-				.getValue(evalContext, boolean.class);
+		return getExpression(this.conditionCache, elementKey, conditionExpression).getValue(
+				evalContext, boolean.class);
 	}
 
 	private Method getTargetMethod(Class<?> targetClass, Method method) {
@@ -77,9 +77,6 @@ class EventExpressionEvaluator extends CachedExpressionEvaluator {
 		Method targetMethod = this.targetMethodCache.get(methodKey);
 		if (targetMethod == null) {
 			targetMethod = AopUtils.getMostSpecificMethod(method, targetClass);
-			if (targetMethod == null) {
-				targetMethod = method;
-			}
 			this.targetMethodCache.put(methodKey, targetMethod);
 		}
 		return targetMethod;

spring-context/src/main/java/org/springframework/context/event/EventPublicationInterceptor.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2012 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -64,15 +64,14 @@ public class EventPublicationInterceptor
 	 */
 	public void setApplicationEventClass(Class<?> applicationEventClass) {
 		if (ApplicationEvent.class == applicationEventClass ||
-			!ApplicationEvent.class.isAssignableFrom(applicationEventClass)) {
-			throw new IllegalArgumentException("applicationEventClass needs to extend ApplicationEvent");
+				!ApplicationEvent.class.isAssignableFrom(applicationEventClass)) {
+			throw new IllegalArgumentException("'applicationEventClass' needs to extend ApplicationEvent");
 		}
 		try {
-			this.applicationEventClassConstructor =
-					applicationEventClass.getConstructor(new Class<?>[] {Object.class});
+			this.applicationEventClassConstructor = applicationEventClass.getConstructor(Object.class);
 		}
 		catch (NoSuchMethodException ex) {
-			throw new IllegalArgumentException("applicationEventClass [" +
+			throw new IllegalArgumentException("ApplicationEvent class [" +
 					applicationEventClass.getName() + "] does not have the required Object constructor: " + ex);
 		}
 	}
@@ -85,7 +84,7 @@ public class EventPublicationInterceptor
 	@Override
 	public void afterPropertiesSet() throws Exception {
 		if (this.applicationEventClassConstructor == null) {
-			throw new IllegalArgumentException("applicationEventClass is required");
+			throw new IllegalArgumentException("Property 'applicationEventClass' is required");
 		}
 	}
 
@@ -95,7 +94,7 @@ public class EventPublicationInterceptor
 		Object retVal = invocation.proceed();
 
 		ApplicationEvent event = (ApplicationEvent)
-				this.applicationEventClassConstructor.newInstance(new Object[] {invocation.getThis()});
+				this.applicationEventClassConstructor.newInstance(invocation.getThis());
 		this.applicationEventPublisher.publishEvent(event);
 
 		return retVal;

spring-context/src/main/java/org/springframework/context/event/GenericApplicationListenerAdapter.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2016 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -75,12 +75,8 @@ public class GenericApplicationListenerAdapter implements GenericApplicationList
 
 	@Override
 	public boolean supportsSourceType(Class<?> sourceType) {
-		if (this.delegate instanceof SmartApplicationListener) {
-			return ((SmartApplicationListener) this.delegate).supportsSourceType(sourceType);
-		}
-		else {
-			return true;
-		}
+		return !(this.delegate instanceof SmartApplicationListener) ||
+				((SmartApplicationListener) this.delegate).supportsSourceType(sourceType);
 	}
 
 	@Override
@@ -91,17 +87,13 @@ public class GenericApplicationListenerAdapter implements GenericApplicationList
 
 	static ResolvableType resolveDeclaredEventType(Class<?> listenerType) {
 		ResolvableType resolvableType = ResolvableType.forClass(listenerType).as(ApplicationListener.class);
-		if (resolvableType == null || !resolvableType.hasGenerics()) {
-			return null;
-		}
-		return resolvableType.getGeneric();
+		return (resolvableType.hasGenerics() ? resolvableType.getGeneric() : null);
 	}
 
 	private static ResolvableType resolveDeclaredEventType(ApplicationListener<ApplicationEvent> listener) {
 		ResolvableType declaredEventType = resolveDeclaredEventType(listener.getClass());
 		if (declaredEventType == null || declaredEventType.isAssignableFrom(
 				ResolvableType.forClass(ApplicationEvent.class))) {
-
 			Class<?> targetClass = AopUtils.getTargetClass(listener);
 			if (targetClass != listener.getClass()) {
 				declaredEventType = resolveDeclaredEventType(targetClass);

spring-context/src/main/java/org/springframework/context/expression/AnnotatedElementKey.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2016 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -75,6 +75,9 @@ public final class AnnotatedElementKey implements Comparable<AnnotatedElementKey
 	public int compareTo(AnnotatedElementKey other) {
 		int result = this.element.toString().compareTo(other.element.toString());
 		if (result == 0 && this.targetClass != null) {
+			if (other.targetClass == null) {
+				return 1;
+			}
 			result = this.targetClass.getName().compareTo(other.targetClass.getName());
 		}
 		return result;

spring-context/src/main/java/org/springframework/context/expression/MapAccessor.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2015 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -68,27 +68,6 @@ public class MapAccessor implements CompilablePropertyAccessor {
 		map.put(name, newValue);
 	}
 
-
-	/**
-	 * Exception thrown from {@code read} in order to reset a cached
-	 * PropertyAccessor, allowing other accessors to have a try.
-	 */
-	@SuppressWarnings("serial")
-	private static class MapAccessException extends AccessException {
-
-		private final String key;
-
-		public MapAccessException(String key) {
-			super(null);
-			this.key = key;
-		}
-
-		@Override
-		public String getMessage() {
-			return "Map does not contain a value for key '" + this.key + "'";
-		}
-	}
-
 	@Override
 	public boolean isCompilable() {
 		return true;
@@ -112,4 +91,25 @@ public class MapAccessor implements CompilablePropertyAccessor {
 		mv.visitMethodInsn(INVOKEINTERFACE, "java/util/Map", "get","(Ljava/lang/Object;)Ljava/lang/Object;",true);
 	}
 
+
+	/**
+	 * Exception thrown from {@code read} in order to reset a cached
+	 * PropertyAccessor, allowing other accessors to have a try.
+	 */
+	@SuppressWarnings("serial")
+	private static class MapAccessException extends AccessException {
+
+		private final String key;
+
+		public MapAccessException(String key) {
+			super(null);
+			this.key = key;
+		}
+
+		@Override
+		public String getMessage() {
+			return "Map does not contain a value for key '" + this.key + "'";
+		}
+	}
+
 }

spring-context/src/main/java/org/springframework/context/expression/StandardBeanExpressionResolver.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2014 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -160,7 +160,7 @@ public class StandardBeanExpressionResolver implements BeanExpressionResolver {
 			}
 			return expr.getValue(sec);
 		}
-		catch (Exception ex) {
+		catch (Throwable ex) {
 			throw new BeanExpressionException("Expression parsing failed", ex);
 		}
 	}

spring-context/src/main/java/org/springframework/context/support/DefaultMessageSourceResolvable.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2016 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -96,11 +96,6 @@ public class DefaultMessageSourceResolvable implements MessageSourceResolvable,
 	}
 
 
-	@Override
-	public String[] getCodes() {
-		return this.codes;
-	}
-
 	/**
 	 * Return the default code of this resolvable, that is,
 	 * the last one in the codes array.
@@ -109,6 +104,11 @@ public class DefaultMessageSourceResolvable implements MessageSourceResolvable,
 		return (this.codes != null && this.codes.length > 0 ? this.codes[this.codes.length - 1] : null);
 	}
 
+	@Override
+	public String[] getCodes() {
+		return this.codes;
+	}
+
 	@Override
 	public Object[] getArguments() {
 		return this.arguments;

spring-context/src/main/java/org/springframework/context/support/MessageSourceAccessor.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2012 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -40,6 +40,7 @@ public class MessageSourceAccessor {
 
 	private final Locale defaultLocale;
 
+
 	/**
 	 * Create a new MessageSourceAccessor, using LocaleContextHolder's locale
 	 * as default locale.
@@ -61,6 +62,7 @@ public class MessageSourceAccessor {
 		this.defaultLocale = defaultLocale;
 	}
 
+
 	/**
 	 * Return the default locale to use if no explicit locale has been given.
 	 * <p>The default implementation returns the default locale passed into the

spring-context/src/main/java/org/springframework/context/support/SimpleThreadScope.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2015 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -67,12 +67,12 @@ public class SimpleThreadScope implements Scope {
 	@Override
 	public Object get(String name, ObjectFactory<?> objectFactory) {
 		Map<String, Object> scope = this.threadScope.get();
-		Object object = scope.get(name);
-		if (object == null) {
-			object = objectFactory.getObject();
-			scope.put(name, object);
+		Object scopedObject = scope.get(name);
+		if (scopedObject == null) {
+			scopedObject = objectFactory.getObject();
+			scope.put(name, scopedObject);
 		}
-		return object;
+		return scopedObject;
 	}
 
 	@Override

spring-context/src/main/java/org/springframework/format/number/CurrencyStyleFormatter.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2015 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -72,7 +72,7 @@ public class CurrencyStyleFormatter extends AbstractNumberFormatter {
 	}
 
 	/**
-	 * Sets the pattern to use to format number values.
+	 * Specify the pattern to use to format number values.
 	 * If not specified, the default DecimalFormat pattern is used.
 	 * @see java.text.DecimalFormat#applyPattern(String)
 	 */

spring-context/src/main/java/org/springframework/format/number/NumberFormatAnnotationFormatterFactory.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2015 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

spring-context/src/main/java/org/springframework/format/number/NumberStyleFormatter.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2015 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -56,7 +56,7 @@ public class NumberStyleFormatter extends AbstractNumberFormatter {
 
 
 	/**
-	 * Sets the pattern to use to format number values.
+	 * Specify the pattern to use to format number values.
 	 * If not specified, the default DecimalFormat pattern is used.
 	 * @see java.text.DecimalFormat#applyPattern(String)
 	 */

spring-context/src/main/java/org/springframework/instrument/classloading/glassfish/GlassFishLoadTimeWeaver.java

@@ -48,10 +48,20 @@ public class GlassFishLoadTimeWeaver implements LoadTimeWeaver {
 	private final Method copyMethod;
 
 
+	/**
+	 * Create a new instance of the {@link GlassFishLoadTimeWeaver} class using
+	 * the default {@link ClassLoader class loader}.
+	 * @see org.springframework.util.ClassUtils#getDefaultClassLoader()
+	 */
 	public GlassFishLoadTimeWeaver() {
 		this(ClassUtils.getDefaultClassLoader());
 	}
 
+	/**
+	 * Create a new instance of the {@link GlassFishLoadTimeWeaver} class using
+	 * the supplied {@link ClassLoader}.
+	 * @param classLoader the {@code ClassLoader} to delegate to for weaving
+	 */
 	public GlassFishLoadTimeWeaver(ClassLoader classLoader) {
 		Assert.notNull(classLoader, "ClassLoader must not be null");
 

spring-context/src/main/java/org/springframework/instrument/classloading/weblogic/WebLogicClassPreProcessorAdapter.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2014 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -41,9 +41,7 @@ class WebLogicClassPreProcessorAdapter implements InvocationHandler {
 
 
 	/**
-	 * Creates a new {@link WebLogicClassPreProcessorAdapter}.
-	 * @param transformer the {@link ClassFileTransformer} to be adapted
-	 * (must not be {@code null})
+	 * Construct a new {@link WebLogicClassPreProcessorAdapter}.
 	 */
 	public WebLogicClassPreProcessorAdapter(ClassFileTransformer transformer, ClassLoader loader) {
 		this.transformer = transformer;

spring-context/src/main/java/org/springframework/instrument/classloading/websphere/WebSphereLoadTimeWeaver.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2016 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -25,7 +25,7 @@ import org.springframework.util.ClassUtils;
 
 /**
  * {@link LoadTimeWeaver} implementation for WebSphere's instrumentable ClassLoader.
- * Compatible with WebSphere 7 as well as 8.
+ * Compatible with WebSphere 7 as well as 8 and 9.
  *
  * @author Costin Leau
  * @since 3.1
@@ -48,7 +48,6 @@ public class WebSphereLoadTimeWeaver implements LoadTimeWeaver {
 	 * Create a new instance of the {@link WebSphereLoadTimeWeaver} class using
 	 * the supplied {@link ClassLoader}.
 	 * @param classLoader the {@code ClassLoader} to delegate to for weaving
-	 * (must not be {@code null})
 	 */
 	public WebSphereLoadTimeWeaver(ClassLoader classLoader) {
 		Assert.notNull(classLoader, "ClassLoader must not be null");

spring-context/src/main/java/org/springframework/jmx/export/assembler/InterfaceBasedMBeanInfoAssembler.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2012 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -60,21 +60,14 @@ import org.springframework.util.StringUtils;
 public class InterfaceBasedMBeanInfoAssembler extends AbstractConfigurableMBeanInfoAssembler
 		implements BeanClassLoaderAware, InitializingBean {
 
-	/**
-	 * Stores the array of interfaces to use for creating the management interface.
-	 */
 	private Class<?>[] managedInterfaces;
 
-	/**
-	 * Stores the mappings of bean keys to an array of {@code Class}es.
-	 */
+	/** Mappings of bean keys to an array of classes */
 	private Properties interfaceMappings;
 
 	private ClassLoader beanClassLoader = ClassUtils.getDefaultClassLoader();
 
-	/**
-	 * Stores the mappings of bean keys to an array of {@code Class}es.
-	 */
+	/** Mappings of bean keys to an array of classes */
 	private Map<String, Class<?>[]> resolvedInterfaceMappings;
 
 
@@ -86,7 +79,7 @@ public class InterfaceBasedMBeanInfoAssembler extends AbstractConfigurableMBeanI
 	 * Each entry <strong>MUST</strong> be an interface.
 	 * @see #setInterfaceMappings
 	 */
-	public void setManagedInterfaces(Class<?>[] managedInterfaces) {
+	public void setManagedInterfaces(Class<?>... managedInterfaces) {
 		if (managedInterfaces != null) {
 			for (Class<?> ifc : managedInterfaces) {
 				if (!ifc.isInterface()) {
@@ -103,7 +96,7 @@ public class InterfaceBasedMBeanInfoAssembler extends AbstractConfigurableMBeanI
 	 * <p>The property key should match the bean key and the property value should match
 	 * the list of interface names. When searching for interfaces for a bean, Spring
 	 * will check these mappings first.
-	 * @param mappings the mappins of bean keys to interface names
+	 * @param mappings the mappings of bean keys to interface names
 	 */
 	public void setInterfaceMappings(Properties mappings) {
 		this.interfaceMappings = mappings;
@@ -230,13 +223,11 @@ public class InterfaceBasedMBeanInfoAssembler extends AbstractConfigurableMBeanI
 			}
 		}
 
-		if (ifaces != null) {
-			for (Class<?> ifc : ifaces) {
-				for (Method ifcMethod : ifc.getMethods()) {
-					if (ifcMethod.getName().equals(method.getName()) &&
-							Arrays.equals(ifcMethod.getParameterTypes(), method.getParameterTypes())) {
-						return true;
-					}
+		for (Class<?> ifc : ifaces) {
+			for (Method ifcMethod : ifc.getMethods()) {
+				if (ifcMethod.getName().equals(method.getName()) &&
+						Arrays.equals(ifcMethod.getParameterTypes(), method.getParameterTypes())) {
+					return true;
 				}
 			}
 		}

spring-context/src/main/java/org/springframework/jmx/export/assembler/MetadataMBeanInfoAssembler.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2013 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -34,18 +34,17 @@ import org.springframework.jmx.export.metadata.ManagedNotification;
 import org.springframework.jmx.export.metadata.ManagedOperation;
 import org.springframework.jmx.export.metadata.ManagedOperationParameter;
 import org.springframework.jmx.export.metadata.ManagedResource;
-import org.springframework.jmx.support.MetricType;
 import org.springframework.util.Assert;
 import org.springframework.util.ObjectUtils;
 import org.springframework.util.StringUtils;
 
 /**
- * Implementation of the {@link MBeanInfoAssembler}
- * interface that reads the management interface information from source level metadata.
+ * Implementation of the {@link MBeanInfoAssembler} interface that reads
+ * the management interface information from source level metadata.
  *
  * <p>Uses the {@link JmxAttributeSource} strategy interface, so that
  * metadata can be read using any supported implementation. Out of the box,
- * Spring provides an implementation based on JDK 1.5+ annotations,
+ * Spring provides an implementation based on annotations:
  * {@code AnnotationJmxAttributeSource}.
  *
  * @author Rob Harrop
@@ -339,9 +338,9 @@ public class MetadataMBeanInfoAssembler extends AbstractReflectiveMBeanInfoAssem
 		}
 		else {
 			ManagedAttribute gma =
-				(getter == null) ? ManagedAttribute.EMPTY : this.attributeSource.getManagedAttribute(getter);
+					(getter == null) ? ManagedAttribute.EMPTY : this.attributeSource.getManagedAttribute(getter);
 			ManagedAttribute sma =
-				(setter == null) ? ManagedAttribute.EMPTY : this.attributeSource.getManagedAttribute(setter);
+					(setter == null) ? ManagedAttribute.EMPTY : this.attributeSource.getManagedAttribute(setter);
 			populateAttributeDescriptor(desc,gma,sma);
 		}
 	}
@@ -384,8 +383,7 @@ public class MetadataMBeanInfoAssembler extends AbstractReflectiveMBeanInfoAssem
 			desc.setField(FIELD_METRIC_CATEGORY, metric.getCategory());
 		}
 
-		String metricType = (metric.getMetricType() == null) ? MetricType.GAUGE.toString() : metric.getMetricType().toString();
-		desc.setField(FIELD_METRIC_TYPE, metricType);
+		desc.setField(FIELD_METRIC_TYPE, metric.getMetricType().toString());
 	}
 
 	/**

spring-context/src/main/java/org/springframework/jmx/export/metadata/JmxMetadataUtils.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2005 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -18,6 +18,7 @@ package org.springframework.jmx.export.metadata;
 
 import javax.management.modelmbean.ModelMBeanNotificationInfo;
 
+import org.springframework.util.ObjectUtils;
 import org.springframework.util.StringUtils;
 
 /**
@@ -34,16 +35,16 @@ public abstract class JmxMetadataUtils {
 	 * {@link javax.management.modelmbean.ModelMBeanNotificationInfo}.
 	 */
 	public static ModelMBeanNotificationInfo convertToModelMBeanNotificationInfo(ManagedNotification notificationInfo) {
+		String[] notifTypes = notificationInfo.getNotificationTypes();
+		if (ObjectUtils.isEmpty(notifTypes)) {
+			throw new IllegalArgumentException("Must specify at least one notification type");
+		}
+
 		String name = notificationInfo.getName();
 		if (!StringUtils.hasText(name)) {
 			throw new IllegalArgumentException("Must specify notification name");
 		}
 
-		String[] notifTypes = notificationInfo.getNotificationTypes();
-		if (notifTypes == null || notifTypes.length == 0) {
-			throw new IllegalArgumentException("Must specify at least one notification type");
-		}
-
 		String description = notificationInfo.getDescription();
 		return new ModelMBeanNotificationInfo(notifTypes, name, description);
 	}

spring-context/src/main/java/org/springframework/jmx/export/metadata/ManagedMetric.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2009 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -17,6 +17,7 @@
 package org.springframework.jmx.export.metadata;
 
 import org.springframework.jmx.support.MetricType;
+import org.springframework.util.Assert;
 
 /**
  * Metadata that indicates to expose a given bean property as a JMX attribute,
@@ -74,6 +75,7 @@ public class ManagedMetric extends AbstractJmxAttribute {
 	 * A description of how this metric's values change over time.
 	 */
 	public void setMetricType(MetricType metricType) {
+		Assert.notNull(metricType, "MetricType must not be null");
 		this.metricType = metricType;
 	}
 

spring-context/src/main/java/org/springframework/jmx/export/naming/KeyNamingStrategy.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2012 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -105,17 +105,14 @@ public class KeyNamingStrategy implements ObjectNamingStrategy, InitializingBean
 	 * Merges the {@code Properties} configured in the {@code mappings} and
 	 * {@code mappingLocations} into the final {@code Properties} instance
 	 * used for {@code ObjectName} resolution.
-	 * @throws IOException
 	 */
 	@Override
 	public void afterPropertiesSet() throws IOException {
 		this.mergedMappings = new Properties();
-
 		CollectionUtils.mergePropertiesIntoMap(this.mappings, this.mergedMappings);
 
 		if (this.mappingLocations != null) {
-			for (int i = 0; i < this.mappingLocations.length; i++) {
-				Resource location = this.mappingLocations[i];
+			for (Resource location : this.mappingLocations) {
 				if (logger.isInfoEnabled()) {
 					logger.info("Loading JMX object name mappings file from " + location);
 				}

spring-context/src/main/java/org/springframework/jmx/support/MetricType.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2011 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -18,18 +18,19 @@ package org.springframework.jmx.support;
 
 /**
  * Represents how the measurement values of a {@code ManagedMetric} will change over time.
+ *
  * @author Jennifer Hickey
  * @since 3.0
  */
 public enum MetricType {
 
 	/**
-	 * The measurement values may go up or down over time
+	 * The measurement values may go up or down over time.
 	 */
 	GAUGE,
 
 	/**
-	 * The measurement values will always increase
+	 * The measurement values will always increase.
 	 */
 	COUNTER
 

spring-context/src/main/java/org/springframework/jmx/support/NotificationListenerHolder.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2012 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -73,7 +73,7 @@ public class NotificationListenerHolder {
 
 	/**
 	 * Return the {@link javax.management.NotificationFilter} associated
-	 * with the encapsulated {@link #getNotificationFilter() NotificationFilter}.
+	 * with the encapsulated {@link #getNotificationListener() NotificationListener}.
 	 * <p>May be {@code null}.
 	 */
 	public NotificationFilter getNotificationFilter() {

spring-context/src/main/java/org/springframework/scheduling/concurrent/ConcurrentTaskScheduler.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2013 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -154,7 +154,7 @@ public class ConcurrentTaskScheduler extends ConcurrentTaskExecutor implements T
 	 * Provide an {@link ErrorHandler} strategy.
 	 */
 	public void setErrorHandler(ErrorHandler errorHandler) {
-		Assert.notNull(errorHandler, "'errorHandler' must not be null");
+		Assert.notNull(errorHandler, "ErrorHandler must not be null");
 		this.errorHandler = errorHandler;
 	}
 
@@ -166,7 +166,8 @@ public class ConcurrentTaskScheduler extends ConcurrentTaskExecutor implements T
 				return new EnterpriseConcurrentTriggerScheduler().schedule(decorateTask(task, true), trigger);
 			}
 			else {
-				ErrorHandler errorHandler = (this.errorHandler != null ? this.errorHandler : TaskUtils.getDefaultErrorHandler(true));
+				ErrorHandler errorHandler =
+						(this.errorHandler != null ? this.errorHandler : TaskUtils.getDefaultErrorHandler(true));
 				return new ReschedulingRunnable(task, trigger, this.scheduledExecutor, errorHandler).schedule();
 			}
 		}
@@ -248,9 +249,9 @@ public class ConcurrentTaskScheduler extends ConcurrentTaskExecutor implements T
 			return executor.schedule(task, new javax.enterprise.concurrent.Trigger() {
 				@Override
 				public Date getNextRunTime(LastExecution le, Date taskScheduledTime) {
-					return trigger.nextExecutionTime(le != null ?
+					return (trigger.nextExecutionTime(le != null ?
 							new SimpleTriggerContext(le.getScheduledStart(), le.getRunStart(), le.getRunEnd()) :
-							new SimpleTriggerContext());
+							new SimpleTriggerContext()));
 				}
 				@Override
 				public boolean skipRun(LastExecution lastExecution, Date scheduledRunTime) {

spring-context/src/main/java/org/springframework/scheduling/concurrent/ExecutorConfigurationSupport.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2013 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -196,29 +196,30 @@ public abstract class ExecutorConfigurationSupport extends CustomizableThreadFac
 	 * Perform a shutdown on the underlying ExecutorService.
 	 * @see java.util.concurrent.ExecutorService#shutdown()
 	 * @see java.util.concurrent.ExecutorService#shutdownNow()
-	 * @see #awaitTerminationIfNecessary()
 	 */
 	public void shutdown() {
 		if (logger.isInfoEnabled()) {
 			logger.info("Shutting down ExecutorService" + (this.beanName != null ? " '" + this.beanName + "'" : ""));
 		}
-		if (this.waitForTasksToCompleteOnShutdown) {
-			this.executor.shutdown();
-		}
-		else {
-			this.executor.shutdownNow();
+		if (this.executor != null) {
+			if (this.waitForTasksToCompleteOnShutdown) {
+				this.executor.shutdown();
+			}
+			else {
+				this.executor.shutdownNow();
+			}
+			awaitTerminationIfNecessary(this.executor);
 		}
-		awaitTerminationIfNecessary();
 	}
 
 	/**
 	 * Wait for the executor to terminate, according to the value of the
 	 * {@link #setAwaitTerminationSeconds "awaitTerminationSeconds"} property.
 	 */
-	private void awaitTerminationIfNecessary() {
+	private void awaitTerminationIfNecessary(ExecutorService executor) {
 		if (this.awaitTerminationSeconds > 0) {
 			try {
-				if (!this.executor.awaitTermination(this.awaitTerminationSeconds, TimeUnit.SECONDS)) {
+				if (!executor.awaitTermination(this.awaitTerminationSeconds, TimeUnit.SECONDS)) {
 					if (logger.isWarnEnabled()) {
 						logger.warn("Timed out while waiting for executor" +
 								(this.beanName != null ? " '" + this.beanName + "'" : "") + " to terminate");

spring-context/src/main/java/org/springframework/scheduling/concurrent/ThreadPoolTaskScheduler.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2014 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -67,10 +67,10 @@ public class ThreadPoolTaskScheduler extends ExecutorConfigurationSupport
 
 	private volatile boolean removeOnCancelPolicy = false;
 
-	private volatile ScheduledExecutorService scheduledExecutor;
-
 	private volatile ErrorHandler errorHandler;
 
+	private volatile ScheduledExecutorService scheduledExecutor;
+
 
 	/**
 	 * Set the ScheduledExecutorService's pool size.

spring-context/src/main/java/org/springframework/scheduling/support/PeriodicTrigger.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2013 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -116,7 +116,8 @@ public class PeriodicTrigger implements Trigger {
 			return false;
 		}
 		PeriodicTrigger other = (PeriodicTrigger) obj;
-		return (this.fixedRate == other.fixedRate && this.initialDelay == other.initialDelay && this.period == other.period);
+		return (this.fixedRate == other.fixedRate && this.initialDelay == other.initialDelay &&
+				this.period == other.period);
 	}
 
 	@Override

spring-context/src/main/java/org/springframework/scripting/support/ScriptFactoryPostProcessor.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2016 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -271,8 +271,8 @@ public class ScriptFactoryPostProcessor extends InstantiationAwareBeanPostProces
 			}
 		}
 		catch (Exception ex) {
-			if (ex instanceof BeanCreationException
-					&& ((BeanCreationException) ex).getMostSpecificCause() instanceof BeanCurrentlyInCreationException) {
+			if (ex instanceof BeanCreationException &&
+					((BeanCreationException) ex).getMostSpecificCause() instanceof BeanCurrentlyInCreationException) {
 				if (logger.isTraceEnabled()) {
 					logger.trace("Could not determine scripted object type for bean '" + beanName + "': "
 							+ ex.getMessage());

spring-context/src/main/java/org/springframework/validation/DefaultMessageCodesResolver.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2012 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -112,6 +112,14 @@ public class DefaultMessageCodesResolver implements MessageCodesResolver, Serial
 		this.prefix = (prefix != null ? prefix : "");
 	}
 
+	/**
+	 * Return the prefix to be applied to any code built by this resolver.
+	 * <p>Returns an empty String in case of no prefix.
+	 */
+	protected String getPrefix() {
+		return this.prefix;
+	}
+
 	/**
 	 * Specify the format for message codes built by this resolver.
 	 * <p>The default is {@link Format#PREFIX_ERROR_CODE}.
@@ -119,15 +127,7 @@ public class DefaultMessageCodesResolver implements MessageCodesResolver, Serial
 	 * @see Format
 	 */
 	public void setMessageCodeFormatter(MessageCodeFormatter formatter) {
-		this.formatter = (formatter == null ? DEFAULT_FORMATTER : formatter);
-	}
-
-	/**
-	 * Return the prefix to be applied to any code built by this resolver.
-	 * <p>Returns an empty String in case of no prefix.
-	 */
-	protected String getPrefix() {
-		return this.prefix;
+		this.formatter = (formatter != null ? formatter : DEFAULT_FORMATTER);
 	}
 
 
@@ -141,7 +141,7 @@ public class DefaultMessageCodesResolver implements MessageCodesResolver, Serial
 	 * object/field-specific code, a field-specific code, a plain error code.
 	 * <p>Arrays, Lists and Maps are resolved both for specific elements and
 	 * the whole collection.
-	 * <p>See the {@link DefaultMessageCodesResolver class level Javadoc} for
+	 * <p>See the {@link DefaultMessageCodesResolver class level javadoc} for
 	 * details on the generated codes.
 	 * @return the list of codes
 	 */
@@ -208,14 +208,10 @@ public class DefaultMessageCodesResolver implements MessageCodesResolver, Serial
 
 	/**
 	 * Common message code formats.
-	 *
-	 * @author Phillip Webb
-	 * @author Chris Beams
-	 * @since 3.2
 	 * @see MessageCodeFormatter
 	 * @see DefaultMessageCodesResolver#setMessageCodeFormatter(MessageCodeFormatter)
 	 */
-	public static enum Format implements MessageCodeFormatter {
+	public enum Format implements MessageCodeFormatter {
 
 		/**
 		 * Prefix the error code at the beginning of the generated message code. e.g.:

spring-context/src/main/java/org/springframework/validation/FieldError.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2016 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -62,8 +62,7 @@ public class FieldError extends ObjectError {
 	 * @param arguments the array of arguments to be used to resolve this message
 	 * @param defaultMessage the default message to be used to resolve this message
 	 */
-	public FieldError(
-			String objectName, String field, Object rejectedValue, boolean bindingFailure,
+	public FieldError(String objectName, String field, Object rejectedValue, boolean bindingFailure,
 			String[] codes, Object[] arguments, String defaultMessage) {
 
 		super(objectName, codes, arguments, defaultMessage);

spring-context/src/main/java/org/springframework/validation/ObjectError.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2016 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -27,9 +27,9 @@ import org.springframework.util.Assert;
  * how a message code list is built for an {@code ObjectError}.
  *
  * @author Juergen Hoeller
+ * @since 10.03.2003
  * @see FieldError
  * @see DefaultMessageCodesResolver
- * @since 10.03.2003
  */
 @SuppressWarnings("serial")
 public class ObjectError extends DefaultMessageSourceResolvable {

spring-core/src/main/java/org/springframework/core/MethodClassKey.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2016 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -75,7 +75,7 @@ public final class MethodClassKey implements Comparable<MethodClassKey> {
 		int result = this.method.getName().compareTo(other.method.getName());
 		if (result == 0) {
 			result = this.method.toString().compareTo(other.method.toString());
-			if (result == 0 && this.targetClass != null) {
+			if (result == 0 && this.targetClass != null && other.targetClass != null) {
 				result = this.targetClass.getName().compareTo(other.targetClass.getName());
 			}
 		}

spring-core/src/main/java/org/springframework/core/ResolvableTypeProvider.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2015 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -24,7 +24,7 @@ package org.springframework.core;
  *
  * <p>Users of this interface should be careful in complex hierarchy scenarios, especially
  * when the generic type signature of the class changes in sub-classes. It is always
- * possible to return {@code null} to fallback on a default behaviour.
+ * possible to return {@code null} to fallback on a default behavior.
  *
  * @author Stephane Nicoll
  * @since 4.2

spring-core/src/main/java/org/springframework/core/SerializableTypeWrapper.java

@@ -35,19 +35,19 @@ import org.springframework.util.ConcurrentReferenceHashMap;
 import org.springframework.util.ReflectionUtils;
 
 /**
- * Internal utility class that can be used to obtain wrapped {@link Serializable} variants
- * of {@link java.lang.reflect.Type}s.
+ * Internal utility class that can be used to obtain wrapped {@link Serializable}
+ * variants of {@link java.lang.reflect.Type}s.
  *
  * <p>{@link #forField(Field) Fields} or {@link #forMethodParameter(MethodParameter)
- * MethodParameters} can be used as the root source for a serializable type. Alternatively
- * the {@link #forGenericSuperclass(Class) superclass},
+ * MethodParameters} can be used as the root source for a serializable type.
+ * Alternatively the {@link #forGenericSuperclass(Class) superclass},
  * {@link #forGenericInterfaces(Class) interfaces} or {@link #forTypeParameters(Class)
  * type parameters} or a regular {@link Class} can also be used as source.
  *
  * <p>The returned type will either be a {@link Class} or a serializable proxy of
  * {@link GenericArrayType}, {@link ParameterizedType}, {@link TypeVariable} or
- * {@link WildcardType}. With the exception of {@link Class} (which is final) calls to
- * methods that return further {@link Type}s (for example
+ * {@link WildcardType}. With the exception of {@link Class} (which is final) calls
+ * to methods that return further {@link Type}s (for example
  * {@link GenericArrayType#getGenericComponentType()}) will be automatically wrapped.
  *
  * @author Phillip Webb

spring-core/src/main/java/org/springframework/core/annotation/AnnotatedElementUtils.java

@@ -1441,8 +1441,8 @@ public class AnnotatedElementUtils {
 		 * <p>If this method returns {@code true}, then {@link #getAggregatedResults()}
 		 * must return a non-null value.
 		 * @return {@code true} if this processor supports aggregated results
-		 * @see #getAggregatedResults
 		 * @since 4.3
+		 * @see #getAggregatedResults
 		 */
 		boolean aggregates();
 
@@ -1453,10 +1453,9 @@ public class AnnotatedElementUtils {
 		 * responsible for asking this processor if it {@link #aggregates} results
 		 * and then adding the post-processed results to the list returned by this
 		 * method.
-		 * @return the list of results aggregated by this processor
-		 * (never {@code null} unless {@link #aggregates} returns {@code false})
-		 * @see #aggregates
+		 * @return the list of results aggregated by this processor (never {@code null})
 		 * @since 4.3
+		 * @see #aggregates
 		 */
 		List<T> getAggregatedResults();
 	}

spring-core/src/main/java/org/springframework/core/annotation/AnnotationAttributes.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2016 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -243,10 +243,9 @@ public class AnnotationAttributes extends LinkedHashMap<String, Object> {
 	}
 
 	/**
-	 * Get the value stored under the specified {@code attributeName} as a
-	 * boolean.
-	 * @param attributeName the name of the attribute to get; never
-	 * {@code null} or empty
+	 * Get the value stored under the specified {@code attributeName} as a boolean.
+	 * @param attributeName the name of the attribute to get;
+	 * never {@code null} or empty
 	 * @return the value
 	 * @throws IllegalArgumentException if the attribute does not exist or
 	 * if it is not of the expected type
@@ -256,10 +255,9 @@ public class AnnotationAttributes extends LinkedHashMap<String, Object> {
 	}
 
 	/**
-	 * Get the value stored under the specified {@code attributeName} as a
-	 * number.
-	 * @param attributeName the name of the attribute to get; never
-	 * {@code null} or empty
+	 * Get the value stored under the specified {@code attributeName} as a number.
+	 * @param attributeName the name of the attribute to get;
+	 * never {@code null} or empty
 	 * @return the value
 	 * @throws IllegalArgumentException if the attribute does not exist or
 	 * if it is not of the expected type
@@ -270,10 +268,9 @@ public class AnnotationAttributes extends LinkedHashMap<String, Object> {
 	}
 
 	/**
-	 * Get the value stored under the specified {@code attributeName} as an
-	 * enum.
-	 * @param attributeName the name of the attribute to get; never
-	 * {@code null} or empty
+	 * Get the value stored under the specified {@code attributeName} as an enum.
+	 * @param attributeName the name of the attribute to get;
+	 * never {@code null} or empty
 	 * @return the value
 	 * @throws IllegalArgumentException if the attribute does not exist or
 	 * if it is not of the expected type
@@ -284,10 +281,9 @@ public class AnnotationAttributes extends LinkedHashMap<String, Object> {
 	}
 
 	/**
-	 * Get the value stored under the specified {@code attributeName} as a
-	 * class.
-	 * @param attributeName the name of the attribute to get; never
-	 * {@code null} or empty
+	 * Get the value stored under the specified {@code attributeName} as a class.
+	 * @param attributeName the name of the attribute to get;
+	 * never {@code null} or empty
 	 * @return the value
 	 * @throws IllegalArgumentException if the attribute does not exist or
 	 * if it is not of the expected type
@@ -300,11 +296,10 @@ public class AnnotationAttributes extends LinkedHashMap<String, Object> {
 	/**
 	 * Get the value stored under the specified {@code attributeName} as an
 	 * array of classes.
-	 * <p>If the value stored under the specified {@code attributeName} is
-	 * a class, it will be wrapped in a single-element array before
-	 * returning it.
-	 * @param attributeName the name of the attribute to get; never
-	 * {@code null} or empty
+	 * <p>If the value stored under the specified {@code attributeName} is a class,
+	 * it will be wrapped in a single-element array before returning it.
+	 * @param attributeName the name of the attribute to get;
+	 * never {@code null} or empty
 	 * @return the value
 	 * @throws IllegalArgumentException if the attribute does not exist or
 	 * if it is not of the expected type
@@ -361,8 +356,8 @@ public class AnnotationAttributes extends LinkedHashMap<String, Object> {
 	/**
 	 * Get the annotation of type {@code annotationType} stored under the
 	 * specified {@code attributeName}.
-	 * @param attributeName the name of the attribute to get; never
-	 * {@code null} or empty
+	 * @param attributeName the name of the attribute to get;
+	 * never {@code null} or empty
 	 * @param annotationType the expected annotation type; never {@code null}
 	 * @return the annotation
 	 * @throws IllegalArgumentException if the attribute does not exist or
@@ -381,8 +376,8 @@ public class AnnotationAttributes extends LinkedHashMap<String, Object> {
 	 * a single-element array before returning it.
 	 * <p>Note: if you expect an actual array of annotations, invoke
 	 * {@link #getAnnotationArray(String, Class)} instead.
-	 * @param attributeName the name of the attribute to get; never
-	 * {@code null} or empty
+	 * @param attributeName the name of the attribute to get;
+	 * never {@code null} or empty
 	 * @return the array of {@code AnnotationAttributes}
 	 * @throws IllegalArgumentException if the attribute does not exist or
 	 * if it is not of the expected type
@@ -397,8 +392,8 @@ public class AnnotationAttributes extends LinkedHashMap<String, Object> {
 	 * <p>If the value stored under the specified {@code attributeName} is
 	 * an {@code Annotation}, it will be wrapped in a single-element array
 	 * before returning it.
-	 * @param attributeName the name of the attribute to get; never
-	 * {@code null} or empty
+	 * @param attributeName the name of the attribute to get;
+	 * never {@code null} or empty
 	 * @param annotationType the expected annotation type; never {@code null}
 	 * @return the annotation array
 	 * @throws IllegalArgumentException if the attribute does not exist or
@@ -419,8 +414,8 @@ public class AnnotationAttributes extends LinkedHashMap<String, Object> {
 	 * component type of the expected array type, the single element will be
 	 * wrapped in a single-element array of the appropriate type before
 	 * returning it.
-	 * @param attributeName the name of the attribute to get; never
-	 * {@code null} or empty
+	 * @param attributeName the name of the attribute to get;
+	 * never {@code null} or empty
 	 * @param expectedType the expected type; never {@code null}
 	 * @return the value
 	 * @throws IllegalArgumentException if the attribute does not exist or

spring-core/src/main/java/org/springframework/core/convert/Property.java

@@ -207,8 +207,8 @@ public final class Property {
 	}
 
 	private void addAnnotationsToMap(
-		Map<Class<? extends Annotation>, Annotation> annotationMap,
-		AnnotatedElement object) {
+			Map<Class<? extends Annotation>, Annotation> annotationMap, AnnotatedElement object) {
+
 		if (object != null) {
 			for (Annotation annotation : object.getAnnotations()) {
 				annotationMap.put(annotation.annotationType(), annotation);

spring-core/src/main/java/org/springframework/core/convert/support/ByteBufferConverter.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2015 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -112,6 +112,10 @@ final class ByteBufferConverter implements ConditionalGenericConverter {
 		byte[] bytes = (byte[]) (source instanceof byte[] ? source :
 				this.conversionService.convert(source, sourceType, BYTE_ARRAY_TYPE));
 
+		if (bytes == null) {
+			return ByteBuffer.wrap(new byte[0]);
+		}
+
 		ByteBuffer byteBuffer = ByteBuffer.allocate(bytes.length);
 		byteBuffer.put(bytes);
 

spring-core/src/main/java/org/springframework/core/convert/support/CollectionToArrayConverter.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2012 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -40,10 +40,12 @@ final class CollectionToArrayConverter implements ConditionalGenericConverter {
 
 	private final ConversionService conversionService;
 
+
 	public CollectionToArrayConverter(ConversionService conversionService) {
 		this.conversionService = conversionService;
 	}
 
+
 	@Override
 	public Set<ConvertiblePair> getConvertibleTypes() {
 		return Collections.singleton(new ConvertiblePair(Collection.class, Object[].class));
@@ -51,7 +53,8 @@ final class CollectionToArrayConverter implements ConditionalGenericConverter {
 
 	@Override
 	public boolean matches(TypeDescriptor sourceType, TypeDescriptor targetType) {
-		return ConversionUtils.canConvertElements(sourceType.getElementTypeDescriptor(), targetType.getElementTypeDescriptor(), this.conversionService);
+		return ConversionUtils.canConvertElements(sourceType.getElementTypeDescriptor(),
+				targetType.getElementTypeDescriptor(), this.conversionService);
 	}
 
 	@Override
@@ -63,7 +66,8 @@ final class CollectionToArrayConverter implements ConditionalGenericConverter {
 		Object array = Array.newInstance(targetType.getElementTypeDescriptor().getType(), sourceCollection.size());
 		int i = 0;
 		for (Object sourceElement : sourceCollection) {
-			Object targetElement = this.conversionService.convert(sourceElement, sourceType.elementTypeDescriptor(sourceElement), targetType.getElementTypeDescriptor());
+			Object targetElement = this.conversionService.convert( sourceElement,
+					sourceType.elementTypeDescriptor(sourceElement), targetType.getElementTypeDescriptor());
 			Array.set(array, i++, targetElement);
 		}
 		return array;

spring-core/src/main/java/org/springframework/core/env/ReadOnlySystemAttributesMap.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2015 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -50,10 +50,9 @@ abstract class ReadOnlySystemAttributesMap implements Map<String, String> {
 	public String get(Object key) {
 		if (!(key instanceof String)) {
 			throw new IllegalArgumentException(
-					"Type of key [" + (key != null ? key.getClass().getName() : "null") +
-					"] must be java.lang.String.");
+					"Type of key [" + key.getClass().getName() + "] must be java.lang.String");
 		}
-		return this.getSystemAttribute((String) key);
+		return getSystemAttribute((String) key);
 	}
 
 	@Override

spring-core/src/main/java/org/springframework/core/io/ByteArrayResource.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2015 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -21,6 +21,8 @@ import java.io.IOException;
 import java.io.InputStream;
 import java.util.Arrays;
 
+import org.springframework.util.Assert;
+
 /**
  * {@link Resource} implementation for a given byte array.
  * <p>Creates a {@link ByteArrayInputStream} for the given byte array.
@@ -58,9 +60,7 @@ public class ByteArrayResource extends AbstractResource {
 	 * @param description where the byte array comes from
 	 */
 	public ByteArrayResource(byte[] byteArray, String description) {
-		if (byteArray == null) {
-			throw new IllegalArgumentException("Byte array must not be null");
-		}
+		Assert.notNull(byteArray, "Byte array must not be null");
 		this.byteArray = byteArray;
 		this.description = (description != null ? description : "");
 	}

spring-core/src/main/java/org/springframework/core/io/VfsUtils.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2014 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -46,10 +46,10 @@ public abstract class VfsUtils {
 	private static final String VFS3_PKG = "org.jboss.vfs.";
 	private static final String VFS_NAME = "VFS";
 
-	private static Method VFS_METHOD_GET_ROOT_URL = null;
-	private static Method VFS_METHOD_GET_ROOT_URI = null;
+	private static Method VFS_METHOD_GET_ROOT_URL;
+	private static Method VFS_METHOD_GET_ROOT_URI;
 
-	private static Method VIRTUAL_FILE_METHOD_EXISTS = null;
+	private static Method VIRTUAL_FILE_METHOD_EXISTS;
 	private static Method VIRTUAL_FILE_METHOD_GET_INPUT_STREAM;
 	private static Method VIRTUAL_FILE_METHOD_GET_SIZE;
 	private static Method VIRTUAL_FILE_METHOD_GET_LAST_MODIFIED;
@@ -62,8 +62,8 @@ public abstract class VfsUtils {
 	protected static Class<?> VIRTUAL_FILE_VISITOR_INTERFACE;
 	protected static Method VIRTUAL_FILE_METHOD_VISIT;
 
-	private static Field VISITOR_ATTRIBUTES_FIELD_RECURSE = null;
-	private static Method GET_PHYSICAL_FILE = null;
+	private static Field VISITOR_ATTRIBUTES_FIELD_RECURSE;
+	private static Method GET_PHYSICAL_FILE;
 
 	static {
 		ClassLoader loader = VfsUtils.class.getClassLoader();
@@ -90,7 +90,7 @@ public abstract class VfsUtils {
 			Class<?> visitorAttributesClass = loader.loadClass(VFS3_PKG + "VisitorAttributes");
 			VISITOR_ATTRIBUTES_FIELD_RECURSE = ReflectionUtils.findField(visitorAttributesClass, "RECURSE");
 		}
-		catch (ClassNotFoundException ex) {
+		catch (Throwable ex) {
 			throw new IllegalStateException("Could not detect JBoss VFS infrastructure", ex);
 		}
 	}

spring-core/src/main/java/org/springframework/util/FastByteArrayOutputStream.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2016 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -404,12 +404,6 @@ public class FastByteArrayOutputStream extends OutputStream {
 			else if (len == 0) {
 				return 0;
 			}
-			else if (len < 0) {
-				throw new IllegalArgumentException("len must be 0 or greater: " + len);
-			}
-			else if (off < 0) {
-				throw new IllegalArgumentException("off must be 0 or greater: " + off);
-			}
 			else {
 				if (this.currentBuffer == null) {
 					// This stream doesn't have any data in it...

spring-core/src/main/java/org/springframework/util/MethodInvoker.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2013 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -122,8 +122,8 @@ public class MethodInvoker {
 	 * Set arguments for the method invocation. If this property is not set,
 	 * or the Object array is of length 0, a method with no arguments is assumed.
 	 */
-	public void setArguments(Object[] arguments) {
-		this.arguments = (arguments != null ? arguments : new Object[0]);
+	public void setArguments(Object... arguments) {
+		this.arguments = arguments;
 	}
 
 	/**
@@ -156,12 +156,8 @@ public class MethodInvoker {
 
 		Class<?> targetClass = getTargetClass();
 		String targetMethod = getTargetMethod();
-		if (targetClass == null) {
-			throw new IllegalArgumentException("Either 'targetClass' or 'targetObject' is required");
-		}
-		if (targetMethod == null) {
-			throw new IllegalArgumentException("Property 'targetMethod' is required");
-		}
+		Assert.notNull(targetClass, "Either 'targetClass' or 'targetObject' is required");
+		Assert.notNull(targetMethod, "Property 'targetMethod' is required");
 
 		Object[] arguments = getArguments();
 		Class<?>[] argTypes = new Class<?>[arguments.length];

spring-core/src/main/java/org/springframework/util/ReflectionUtils.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2016 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -724,12 +724,8 @@ public abstract class ReflectionUtils {
 	 * work on objects with public no-arg constructors.
 	 */
 	public static void shallowCopyFieldState(final Object src, final Object dest) {
-		if (src == null) {
-			throw new IllegalArgumentException("Source for field copy cannot be null");
-		}
-		if (dest == null) {
-			throw new IllegalArgumentException("Destination for field copy cannot be null");
-		}
+		Assert.notNull(src, "Source for field copy cannot be null");
+		Assert.notNull(dest, "Destination for field copy cannot be null");
 		if (!src.getClass().isAssignableFrom(dest.getClass())) {
 			throw new IllegalArgumentException("Destination class [" + dest.getClass().getName() +
 					"] must be same or subclass as source class [" + src.getClass().getName() + "]");

spring-core/src/main/java/org/springframework/util/TypeUtils.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2016 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -215,7 +215,6 @@ public abstract class TypeUtils {
 		if (rhsType == null) {
 			return true;
 		}
-
 		if (lhsType == null) {
 			return false;
 		}

spring-core/src/main/java/org/springframework/util/concurrent/FutureAdapter.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2016 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -49,7 +49,7 @@ public abstract class FutureAdapter<T, S> implements Future<T> {
 	 * @param adaptee the future to delegate to
 	 */
 	protected FutureAdapter(Future<S> adaptee) {
-		Assert.notNull(adaptee, "'delegate' must not be null");
+		Assert.notNull(adaptee, "Delegate must not be null");
 		this.adaptee = adaptee;
 	}
 

spring-expression/src/main/java/org/springframework/expression/AccessException.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2012 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -26,20 +26,20 @@ package org.springframework.expression;
 public class AccessException extends Exception {
 
 	/**
-	 * Create an AccessException with a specific message and cause.
+	 * Create an AccessException with a specific message.
 	 * @param message the message
-	 * @param cause the cause
 	 */
-	public AccessException(String message, Exception cause) {
-		super(message, cause);
+	public AccessException(String message) {
+		super(message);
 	}
 
 	/**
-	 * Create an AccessException with a specific message.
+	 * Create an AccessException with a specific message and cause.
 	 * @param message the message
+	 * @param cause the cause
 	 */
-	public AccessException(String message) {
-		super(message);
+	public AccessException(String message, Exception cause) {
+		super(message, cause);
 	}
 
 }

spring-expression/src/main/java/org/springframework/expression/ConstructorExecutor.java

@@ -36,13 +36,12 @@ public interface ConstructorExecutor {
 
 	/**
 	 * Execute a constructor in the specified context using the specified arguments.
-	 *
 	 * @param context the evaluation context in which the command is being executed
-	 * @param arguments the arguments to the constructor call, should match (in terms of
-	 *        number and type) whatever the command will need to run
+	 * @param arguments the arguments to the constructor call, should match (in terms
+	 * of number and type) whatever the command will need to run
 	 * @return the new object
 	 * @throws AccessException if there is a problem executing the command or the
-	 *         CommandExecutor is no longer valid
+	 * CommandExecutor is no longer valid
 	 */
 	TypedValue execute(EvaluationContext context, Object... arguments) throws AccessException;
 

spring-expression/src/main/java/org/springframework/expression/OperatorOverloader.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2013 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -17,9 +17,9 @@
 package org.springframework.expression;
 
 /**
- * By default the mathematical operators {@link Operation} support simple types like
- * numbers. By providing an implementation of OperatorOverloader, a user of the expression
- * language can support these operations on other types.
+ * By default the mathematical operators {@link Operation} support simple types
+ * like numbers. By providing an implementation of OperatorOverloader, a user
+ * of the expression language can support these operations on other types.
  *
  * @author Andy Clement
  * @since 3.0
@@ -27,21 +27,21 @@ package org.springframework.expression;
 public interface OperatorOverloader {
 
 	/**
-	 * Return true if the operator overloader supports the specified operation between the
-	 * two operands and so should be invoked to handle it.
+	 * Return true if the operator overloader supports the specified operation
+	 * between the two operands and so should be invoked to handle it.
 	 * @param operation the operation to be performed
 	 * @param leftOperand the left operand
 	 * @param rightOperand the right operand
-	 * @return true if the OperatorOverloader supports the specified operation between the
-	 *         two operands
+	 * @return true if the OperatorOverloader supports the specified operation
+	 * between the two operands
 	 * @throws EvaluationException if there is a problem performing the operation
 	 */
 	boolean overridesOperation(Operation operation, Object leftOperand, Object rightOperand)
 			throws EvaluationException;
 
 	/**
-	 * Execute the specified operation on two operands, returning a result. See
-	 * {@link Operation} for supported operations.
+	 * Execute the specified operation on two operands, returning a result.
+	 * See {@link Operation} for supported operations.
 	 * @param operation the operation to be performed
 	 * @param leftOperand the left operand
 	 * @param rightOperand the right operand

spring-expression/src/main/java/org/springframework/expression/common/TemplateAwareExpressionParser.java

@@ -112,6 +112,7 @@ public abstract class TemplateAwareExpressionParser implements ExpressionParser
 		String prefix = context.getExpressionPrefix();
 		String suffix = context.getExpressionSuffix();
 		int startIdx = 0;
+
 		while (startIdx < expressionString.length()) {
 			int prefixIndex = expressionString.indexOf(prefix, startIdx);
 			if (prefixIndex >= startIdx) {
@@ -126,22 +127,18 @@ public abstract class TemplateAwareExpressionParser implements ExpressionParser
 							"No ending suffix '" + suffix + "' for expression starting at character " +
 							prefixIndex + ": " + expressionString.substring(prefixIndex));
 				}
-
 				if (suffixIndex == afterPrefixIndex) {
 					throw new ParseException(expressionString, prefixIndex,
 							"No expression defined within delimiter '" + prefix + suffix +
 							"' at character " + prefixIndex);
 				}
-
 				String expr = expressionString.substring(prefixIndex + prefix.length(), suffixIndex);
 				expr = expr.trim();
-
 				if (expr.isEmpty()) {
 					throw new ParseException(expressionString, prefixIndex,
 							"No expression defined within delimiter '" + prefix + suffix +
 							"' at character " + prefixIndex);
 				}
-
 				expressions.add(doParseExpression(expr, context));
 				startIdx = suffixIndex + suffix.length();
 			}
@@ -151,6 +148,7 @@ public abstract class TemplateAwareExpressionParser implements ExpressionParser
 				startIdx = expressionString.length();
 			}
 		}
+
 		return expressions.toArray(new Expression[expressions.size()]);
 	}
 

spring-expression/src/main/java/org/springframework/expression/spel/ExpressionState.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2015 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -32,6 +32,7 @@ import org.springframework.expression.TypeComparator;
 import org.springframework.expression.TypeConverter;
 import org.springframework.expression.TypedValue;
 import org.springframework.util.Assert;
+import org.springframework.util.CollectionUtils;
 
 /**
  * An ExpressionState is for maintaining per-expression-evaluation state, any changes to
@@ -53,6 +54,12 @@ public class ExpressionState {
 
 	private final TypedValue rootObject;
 
+	private final SpelParserConfiguration configuration;
+
+	private Stack<TypedValue> contextObjects;
+
+	private Stack<VariableScope> variableScopes;
+
 	// When entering a new scope there is a new base object which should be used
 	// for '#this' references (or to act as a target for unqualified references).
 	// This stack captures those objects at each nested scope level.
@@ -62,12 +69,6 @@ public class ExpressionState {
 	// element from list1
 	private Stack<TypedValue> scopeRootObjects;
 
-	private final SpelParserConfiguration configuration;
-
-	private Stack<VariableScope> variableScopes;
-
-	private Stack<TypedValue> contextObjects;
-
 
 	public ExpressionState(EvaluationContext context) {
 		this(context, context.getRootObject(), new SpelParserConfiguration(false, false));
@@ -105,7 +106,7 @@ public class ExpressionState {
 	 * The active context object is what unqualified references to properties/etc are resolved against.
 	 */
 	public TypedValue getActiveContextObject() {
-		if (this.contextObjects == null || this.contextObjects.isEmpty()) {
+		if (CollectionUtils.isEmpty(this.contextObjects)) {
 			return this.rootObject;
 		}
 		return this.contextObjects.peek();
@@ -130,7 +131,7 @@ public class ExpressionState {
 	}
 
 	public TypedValue getScopeRootContextObject() {
-		if (this.scopeRootObjects == null || this.scopeRootObjects.isEmpty()) {
+		if (CollectionUtils.isEmpty(this.scopeRootObjects)) {
 			return this.rootObject;
 		}
 		return this.scopeRootObjects.peek();
@@ -142,12 +143,7 @@ public class ExpressionState {
 
 	public TypedValue lookupVariable(String name) {
 		Object value = this.relatedContext.lookupVariable(name);
-		if (value == null) {
-			return TypedValue.NULL;
-		}
-		else {
-			return new TypedValue(value);
-		}
+		return (value != null ? new TypedValue(value) : TypedValue.NULL);
 	}
 
 	public TypeComparator getTypeComparator() {

spring-expression/src/main/java/org/springframework/expression/spel/SpelParserConfiguration.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2014 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -18,7 +18,6 @@ package org.springframework.expression.spel;
 
 import org.springframework.core.SpringProperties;
 
-
 /**
  * Configuration object for the SpEL expression parser.
  *
@@ -106,35 +105,35 @@ public class SpelParserConfiguration {
 
 
 	/**
-	 * @return the configuration mode for parsers using this configuration object
+	 * Return the configuration mode for parsers using this configuration object.
 	 */
 	public SpelCompilerMode getCompilerMode() {
 		return this.compilerMode;
 	}
 
 	/**
-	 * @return the ClassLoader to use as the basis for expression compilation
+	 * Return the ClassLoader to use as the basis for expression compilation.
 	 */
 	public ClassLoader getCompilerClassLoader() {
 		return this.compilerClassLoader;
 	}
 
 	/**
-	 * @return {@code true} if {@code null} references should be automatically grown
+	 * Return {@code true} if {@code null} references should be automatically grown.
 	 */
 	public boolean isAutoGrowNullReferences() {
 		return this.autoGrowNullReferences;
 	}
 
 	/**
-	 * @return {@code true} if collections should be automatically grown
+	 * Return {@code true} if collections should be automatically grown.
 	 */
 	public boolean isAutoGrowCollections() {
 		return this.autoGrowCollections;
 	}
 
 	/**
-	 * @return the maximum size that a collection can auto grow
+	 * Return the maximum size that a collection can auto grow.
 	 */
 	public int getMaximumAutoGrowSize() {
 		return this.maximumAutoGrowSize;

spring-expression/src/main/java/org/springframework/expression/spel/ast/BeanReference.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2014 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -37,7 +37,7 @@ public class BeanReference extends SpelNodeImpl {
 	private final String beanName;
 
 
-	public BeanReference(int pos,String beanName) {
+	public BeanReference(int pos, String beanName) {
 		super(pos);
 		this.beanName = beanName;
 	}

spring-expression/src/main/java/org/springframework/expression/spel/ast/CompoundExpression.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2015 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -31,7 +31,7 @@ import org.springframework.expression.spel.SpelEvaluationException;
  */
 public class CompoundExpression extends SpelNodeImpl {
 
-	public CompoundExpression(int pos,SpelNodeImpl... expressionComponents) {
+	public CompoundExpression(int pos, SpelNodeImpl... expressionComponents) {
 		super(pos, expressionComponents);
 		if (expressionComponents.length < 2) {
 			throw new IllegalStateException("Do not build compound expressions with less than two entries: " +

spring-expression/src/main/java/org/springframework/expression/spel/ast/FunctionReference.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2016 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -59,7 +59,7 @@ public class FunctionReference extends SpelNodeImpl {
 
 
 	public FunctionReference(String functionName, int pos, SpelNodeImpl... arguments) {
-		super(pos,arguments);
+		super(pos, arguments);
 		this.name = functionName;
 	}
 
@@ -107,15 +107,15 @@ public class FunctionReference extends SpelNodeImpl {
 					SpelMessage.FUNCTION_MUST_BE_STATIC, ClassUtils.getQualifiedMethodName(method), this.name);
 		}
 
-		argumentConversionOccurred = false;
+		this.argumentConversionOccurred = false;
 		// Convert arguments if necessary and remap them for varargs if required
 		if (functionArgs != null) {
 			TypeConverter converter = state.getEvaluationContext().getTypeConverter();
-			argumentConversionOccurred = ReflectionHelper.convertAllArguments(converter, functionArgs, method);
+			this.argumentConversionOccurred = ReflectionHelper.convertAllArguments(converter, functionArgs, method);
 		}
 		if (method.isVarArgs()) {
-			functionArgs =
-					ReflectionHelper.setupArgumentsForVarargsInvocation(method.getParameterTypes(), functionArgs);
+			functionArgs = ReflectionHelper.setupArgumentsForVarargsInvocation(
+					method.getParameterTypes(), functionArgs);
 		}
 
 		try {

spring-expression/src/main/java/org/springframework/expression/spel/ast/Indexer.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2016 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -51,7 +51,7 @@ import org.springframework.expression.spel.support.ReflectivePropertyAccessor;
 // TODO support correct syntax for multidimensional [][][] and not [,,,]
 public class Indexer extends SpelNodeImpl {
 
-	private static enum IndexedType {ARRAY, LIST, MAP, STRING, OBJECT}
+	private enum IndexedType {ARRAY, LIST, MAP, STRING, OBJECT}
 
 
 	// These fields are used when the indexer is being used as a property read accessor.

spring-expression/src/main/java/org/springframework/expression/spel/ast/NullLiteral.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2014 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -29,7 +29,7 @@ import org.springframework.expression.spel.CodeFlow;
 public class NullLiteral extends Literal {
 
 	public NullLiteral(int pos) {
-		super(null,pos);
+		super(null, pos);
 		this.exitTypeDescriptor = "Ljava/lang/Object";
 	}
 

spring-expression/src/main/java/org/springframework/expression/spel/ast/OpAnd.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2014 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -44,7 +44,7 @@ public class OpAnd extends Operator {
 
 	@Override
 	public TypedValue getValueInternal(ExpressionState state) throws EvaluationException {
-		if (getBooleanValue(state, getLeftOperand()) == false) {
+		if (!getBooleanValue(state, getLeftOperand())) {
 			// no need to evaluate right operand
 			return BooleanTypedValue.FALSE;
 		}

spring-expression/src/main/java/org/springframework/expression/spel/ast/OpPlus.java

@@ -192,8 +192,8 @@ public class OpPlus extends Operator {
 	private void walk(MethodVisitor mv, CodeFlow cf, SpelNodeImpl operand) {
 		if (operand instanceof OpPlus) {
 			OpPlus plus = (OpPlus)operand;
-			walk(mv,cf,plus.getLeftOperand());
-			walk(mv,cf,plus.getRightOperand());
+			walk(mv, cf, plus.getLeftOperand());
+			walk(mv, cf, plus.getRightOperand());
 		}
 		else {
 			cf.enterCompilationScope();

spring-expression/src/main/java/org/springframework/expression/spel/ast/Operator.java

@@ -87,7 +87,7 @@ public abstract class Operator extends SpelNodeImpl {
 
 	protected boolean isCompilableOperatorUsingNumerics() {
 		SpelNodeImpl left = getLeftOperand();
-		SpelNodeImpl right= getRightOperand();
+		SpelNodeImpl right = getRightOperand();
 		if (!left.isCompilable() || !right.isCompilable()) {
 			return false;
 		}
@@ -273,11 +273,11 @@ public abstract class Operator extends SpelNodeImpl {
 			boolean rightNumeric = CodeFlow.isPrimitiveOrUnboxableSupportedNumberOrBoolean(rd);
 			
 			// If the declared descriptors aren't providing the information, try the actual descriptors
-			if (!leftNumeric && !ld.equals(leftActualDescriptor)) {
+			if (!leftNumeric && !ObjectUtils.nullSafeEquals(ld, leftActualDescriptor)) {
 				ld = leftActualDescriptor;
 				leftNumeric = CodeFlow.isPrimitiveOrUnboxableSupportedNumberOrBoolean(ld);
 			}
-			if (!rightNumeric && !rd.equals(rightActualDescriptor)) {
+			if (!rightNumeric && !ObjectUtils.nullSafeEquals(rd, rightActualDescriptor)) {
 				rd = rightActualDescriptor;
 				rightNumeric = CodeFlow.isPrimitiveOrUnboxableSupportedNumberOrBoolean(rd);
 			}

spring-expression/src/main/java/org/springframework/expression/spel/ast/OperatorMatches.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2015 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

spring-expression/src/main/java/org/springframework/expression/spel/ast/SpelNodeImpl.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2014 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -77,6 +77,7 @@ public abstract class SpelNodeImpl implements SpelNode, Opcodes {
 	}
 
 
+	@Deprecated
 	protected SpelNodeImpl getPreviousChild() {
 		SpelNodeImpl result = null;
 		if (this.parent != null) {
@@ -214,9 +215,9 @@ public abstract class SpelNodeImpl implements SpelNode, Opcodes {
 
 	
 	/**
-	 * Generate code that handles building the argument values for the specified method. This method will take account
-	 * of whether the invoked method is a varargs method and if it is then the argument values will be appropriately
-	 * packaged into an array.
+	 * Generate code that handles building the argument values for the specified method.
+	 * This method will take account of whether the invoked method is a varargs method
+	 * and if it is then the argument values will be appropriately packaged into an array.
 	 * @param mv the method visitor where code should be generated
 	 * @param cf the current codeflow
 	 * @param member the method or constructor for which arguments are being setup
@@ -226,7 +227,7 @@ public abstract class SpelNodeImpl implements SpelNode, Opcodes {
 		String[] paramDescriptors = null;
 		boolean isVarargs = false;
 		if (member instanceof Constructor) {
-			Constructor<?> ctor = (Constructor<?>)member;
+			Constructor<?> ctor = (Constructor<?>) member;
 			paramDescriptors = CodeFlow.toDescriptors(ctor.getParameterTypes());
 			isVarargs = ctor.isVarArgs();
 		}
@@ -246,25 +247,25 @@ public abstract class SpelNodeImpl implements SpelNode, Opcodes {
 				generateCodeForArgument(mv, cf, arguments[p], paramDescriptors[p]);
 			}
 			
-			SpelNodeImpl lastchild = (childCount == 0 ? null : arguments[childCount - 1]);
-			String arraytype = paramDescriptors[paramDescriptors.length - 1];
+			SpelNodeImpl lastChild = (childCount == 0 ? null : arguments[childCount - 1]);
+			String arrayType = paramDescriptors[paramDescriptors.length - 1];
 			// Determine if the final passed argument is already suitably packaged in array
 			// form to be passed to the method
-			if (lastchild != null && lastchild.getExitDescriptor().equals(arraytype)) {
-				generateCodeForArgument(mv, cf, lastchild, paramDescriptors[p]);
+			if (lastChild != null && arrayType.equals(lastChild.getExitDescriptor())) {
+				generateCodeForArgument(mv, cf, lastChild, paramDescriptors[p]);
 			}
 			else {
-				arraytype = arraytype.substring(1); // trim the leading '[', may leave other '['		
+				arrayType = arrayType.substring(1); // trim the leading '[', may leave other '['
 				// build array big enough to hold remaining arguments
-				CodeFlow.insertNewArrayCode(mv, childCount - p, arraytype);
+				CodeFlow.insertNewArrayCode(mv, childCount - p, arrayType);
 				// Package up the remaining arguments into the array
 				int arrayindex = 0;
 				while (p < childCount) {
 					SpelNodeImpl child = arguments[p];
 					mv.visitInsn(DUP);
 					CodeFlow.insertOptimalLoad(mv, arrayindex++);
-					generateCodeForArgument(mv, cf, child, arraytype);
-					CodeFlow.insertArrayStore(mv, arraytype);
+					generateCodeForArgument(mv, cf, child, arrayType);
+					CodeFlow.insertArrayStore(mv, arrayType);
 					p++;
 				}
 			}
@@ -283,15 +284,16 @@ public abstract class SpelNodeImpl implements SpelNode, Opcodes {
 	protected static void generateCodeForArgument(MethodVisitor mv, CodeFlow cf, SpelNodeImpl argument, String paramDesc) {
 		cf.enterCompilationScope();
 		argument.generateCode(mv, cf);
-		boolean primitiveOnStack = CodeFlow.isPrimitive(cf.lastDescriptor());
+		String lastDesc = cf.lastDescriptor();
+		boolean primitiveOnStack = CodeFlow.isPrimitive(lastDesc);
 		// Check if need to box it for the method reference?
 		if (primitiveOnStack && paramDesc.charAt(0) == 'L') {
-			CodeFlow.insertBoxIfNecessary(mv, cf.lastDescriptor().charAt(0));
+			CodeFlow.insertBoxIfNecessary(mv, lastDesc.charAt(0));
 		}
 		else if (paramDesc.length() == 1 && !primitiveOnStack) {
-			CodeFlow.insertUnboxInsns(mv, paramDesc.charAt(0), cf.lastDescriptor());
+			CodeFlow.insertUnboxInsns(mv, paramDesc.charAt(0), lastDesc);
 		}
-		else if (!cf.lastDescriptor().equals(paramDesc)) {
+		else if (!paramDesc.equals(lastDesc)) {
 			// This would be unnecessary in the case of subtyping (e.g. method takes Number but Integer passed in)
 			CodeFlow.insertCheckCast(mv, paramDesc);
 		}

spring-expression/src/main/java/org/springframework/expression/spel/standard/SpelCompiler.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2015 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -88,14 +88,13 @@ public class SpelCompiler implements Opcodes {
 
 
 	/**
-	 * Attempt compilation of the supplied expression. A check is
-	 * made to see if it is compilable before compilation proceeds. The
-	 * check involves visiting all the nodes in the expression Ast and
-	 * ensuring enough state is known about them that bytecode can
-	 * be generated for them.
+	 * Attempt compilation of the supplied expression. A check is made to see
+	 * if it is compilable before compilation proceeds. The check involves
+	 * visiting all the nodes in the expression Ast and ensuring enough state
+	 * is known about them that bytecode can be generated for them.
 	 * @param expression the expression to compile
-	 * @return an instance of the class implementing the compiled expression, or null
-	 * if compilation is not possible
+	 * @return an instance of the class implementing the compiled expression,
+	 * or {@code null} if compilation is not possible
 	 */
 	public CompiledExpression compile(SpelNodeImpl expression) {
 		if (expression.isCompilable()) {

spring-expression/src/main/java/org/springframework/expression/spel/support/ReflectionHelper.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2016 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -27,6 +27,7 @@ import org.springframework.expression.TypeConverter;
 import org.springframework.expression.spel.SpelEvaluationException;
 import org.springframework.util.Assert;
 import org.springframework.util.ClassUtils;
+import org.springframework.util.CollectionUtils;
 import org.springframework.util.MethodInvoker;
 
 /**
@@ -141,8 +142,8 @@ public class ReflectionHelper {
 	static ArgumentsMatchInfo compareArgumentsVarargs(
 			List<TypeDescriptor> expectedArgTypes, List<TypeDescriptor> suppliedArgTypes, TypeConverter typeConverter) {
 
-		Assert.isTrue(expectedArgTypes != null && expectedArgTypes.size() > 0,
-				"Expected arguments must at least include one array (the vargargs parameter)");
+		Assert.isTrue(!CollectionUtils.isEmpty(expectedArgTypes),
+				"Expected arguments must at least include one array (the varargs parameter)");
 		Assert.isTrue(expectedArgTypes.get(expectedArgTypes.size() - 1).isArray(),
 				"Final expected argument should be array type (the varargs parameter)");
 

spring-expression/src/main/java/org/springframework/expression/spel/support/ReflectiveMethodExecutor.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2015 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -44,6 +44,7 @@ public class ReflectiveMethodExecutor implements MethodExecutor {
 
 	private boolean argumentConversionOccurred = false;
 
+
 	public ReflectiveMethodExecutor(Method method) {
 		this.method = method;
 		if (method.isVarArgs()) {
@@ -55,6 +56,7 @@ public class ReflectiveMethodExecutor implements MethodExecutor {
 		}
 	}
 
+
 	public Method getMethod() {
 		return this.method;
 	}
@@ -68,8 +70,8 @@ public class ReflectiveMethodExecutor implements MethodExecutor {
 	 * method (if there is one!). For toString() it may walk as far as Object.
 	 */
 	public Class<?> getPublicDeclaringClass() {
-		if (!computedPublicDeclaringClass) {
-			this.publicDeclaringClass = discoverPublicClass(method, method.getDeclaringClass());
+		if (!this.computedPublicDeclaringClass) {
+			this.publicDeclaringClass = discoverPublicClass(this.method, this.method.getDeclaringClass());
 			this.computedPublicDeclaringClass = true;
 		}
 		return this.publicDeclaringClass;

spring-expression/src/main/java/org/springframework/expression/spel/support/StandardEvaluationContext.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2014 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -93,14 +93,23 @@ public class StandardEvaluationContext implements EvaluationContext {
 		return this.rootObject;
 	}
 
-	public void addConstructorResolver(ConstructorResolver resolver) {
-		ensureConstructorResolversInitialized();
-		this.constructorResolvers.add(this.constructorResolvers.size() - 1, resolver);
+	public void setPropertyAccessors(List<PropertyAccessor> propertyAccessors) {
+		this.propertyAccessors = propertyAccessors;
 	}
 
-	public boolean removeConstructorResolver(ConstructorResolver resolver) {
-		ensureConstructorResolversInitialized();
-		return this.constructorResolvers.remove(resolver);
+	@Override
+	public List<PropertyAccessor> getPropertyAccessors() {
+		ensurePropertyAccessorsInitialized();
+		return this.propertyAccessors;
+	}
+
+	public void addPropertyAccessor(PropertyAccessor accessor) {
+		ensurePropertyAccessorsInitialized();
+		this.propertyAccessors.add(this.propertyAccessors.size() - 1, accessor);
+	}
+
+	public boolean removePropertyAccessor(PropertyAccessor accessor) {
+		return this.propertyAccessors.remove(accessor);
 	}
 
 	public void setConstructorResolvers(List<ConstructorResolver> constructorResolvers) {
@@ -113,14 +122,14 @@ public class StandardEvaluationContext implements EvaluationContext {
 		return this.constructorResolvers;
 	}
 
-	public void addMethodResolver(MethodResolver resolver) {
-		ensureMethodResolversInitialized();
-		this.methodResolvers.add(this.methodResolvers.size() - 1, resolver);
+	public void addConstructorResolver(ConstructorResolver resolver) {
+		ensureConstructorResolversInitialized();
+		this.constructorResolvers.add(this.constructorResolvers.size() - 1, resolver);
 	}
 
-	public boolean removeMethodResolver(MethodResolver methodResolver) {
-		ensureMethodResolversInitialized();
-		return this.methodResolvers.remove(methodResolver);
+	public boolean removeConstructorResolver(ConstructorResolver resolver) {
+		ensureConstructorResolversInitialized();
+		return this.constructorResolvers.remove(resolver);
 	}
 
 	public void setMethodResolvers(List<MethodResolver> methodResolvers) {
@@ -133,32 +142,23 @@ public class StandardEvaluationContext implements EvaluationContext {
 		return this.methodResolvers;
 	}
 
-	public void setBeanResolver(BeanResolver beanResolver) {
-		this.beanResolver = beanResolver;
-	}
-
-	@Override
-	public BeanResolver getBeanResolver() {
-		return this.beanResolver;
-	}
-
-	public void addPropertyAccessor(PropertyAccessor accessor) {
-		ensurePropertyAccessorsInitialized();
-		this.propertyAccessors.add(this.propertyAccessors.size() - 1, accessor);
+	public void addMethodResolver(MethodResolver resolver) {
+		ensureMethodResolversInitialized();
+		this.methodResolvers.add(this.methodResolvers.size() - 1, resolver);
 	}
 
-	public boolean removePropertyAccessor(PropertyAccessor accessor) {
-		return this.propertyAccessors.remove(accessor);
+	public boolean removeMethodResolver(MethodResolver methodResolver) {
+		ensureMethodResolversInitialized();
+		return this.methodResolvers.remove(methodResolver);
 	}
 
-	public void setPropertyAccessors(List<PropertyAccessor> propertyAccessors) {
-		this.propertyAccessors = propertyAccessors;
+	public void setBeanResolver(BeanResolver beanResolver) {
+		this.beanResolver = beanResolver;
 	}
 
 	@Override
-	public List<PropertyAccessor> getPropertyAccessors() {
-		ensurePropertyAccessorsInitialized();
-		return this.propertyAccessors;
+	public BeanResolver getBeanResolver() {
+		return this.beanResolver;
 	}
 
 	public void setTypeLocator(TypeLocator typeLocator) {
@@ -169,7 +169,7 @@ public class StandardEvaluationContext implements EvaluationContext {
 	@Override
 	public TypeLocator getTypeLocator() {
 		if (this.typeLocator == null) {
-			 this.typeLocator = new StandardTypeLocator();
+			this.typeLocator = new StandardTypeLocator();
 		}
 		return this.typeLocator;
 	}
@@ -244,6 +244,7 @@ public class StandardEvaluationContext implements EvaluationContext {
 		}
 	}
 
+
 	private void ensurePropertyAccessorsInitialized() {
 		if (this.propertyAccessors == null) {
 			initializePropertyAccessors();
@@ -258,6 +259,20 @@ public class StandardEvaluationContext implements EvaluationContext {
 		}
 	}
 
+	private void ensureConstructorResolversInitialized() {
+		if (this.constructorResolvers == null) {
+			initializeConstructorResolvers();
+		}
+	}
+
+	private synchronized void initializeConstructorResolvers() {
+		if (this.constructorResolvers == null) {
+			List<ConstructorResolver> defaultResolvers = new ArrayList<ConstructorResolver>();
+			defaultResolvers.add(new ReflectiveConstructorResolver());
+			this.constructorResolvers = defaultResolvers;
+		}
+	}
+
 	private void ensureMethodResolversInitialized() {
 		if (this.methodResolvers == null) {
 			initializeMethodResolvers();
@@ -273,18 +288,4 @@ public class StandardEvaluationContext implements EvaluationContext {
 		}
 	}
 
-	private void ensureConstructorResolversInitialized() {
-		if (this.constructorResolvers == null) {
-			initializeConstructorResolvers();
-		}
-	}
-
-	private synchronized void initializeConstructorResolvers() {
-		if (this.constructorResolvers == null) {
-			List<ConstructorResolver> defaultResolvers = new ArrayList<ConstructorResolver>();
-			defaultResolvers.add(new ReflectiveConstructorResolver());
-			this.constructorResolvers = defaultResolvers;
-		}
-	}
-
 }

spring-expression/src/main/java/org/springframework/expression/spel/support/StandardTypeConverter.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2016 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -67,8 +67,9 @@ public class StandardTypeConverter implements TypeConverter {
 			return this.conversionService.convert(value, sourceType, targetType);
 		}
 		catch (ConversionException ex) {
-			throw new SpelEvaluationException(
-					ex, SpelMessage.TYPE_CONVERSION_ERROR, sourceType.toString(), targetType.toString());
+			throw new SpelEvaluationException(ex, SpelMessage.TYPE_CONVERSION_ERROR,
+					(sourceType != null ? sourceType.toString() : (value != null ? value.getClass().getName() : "null")),
+					targetType.toString());
 		}
 	}
 

spring-jdbc/src/main/java/org/springframework/jdbc/datasource/LazyConnectionDataSourceProxy.java

@@ -408,7 +408,7 @@ public class LazyConnectionDataSourceProxy extends DelegatingDataSource {
 				// Apply kept transaction settings, if any.
 				if (this.readOnly) {
 					try {
-						this.target.setReadOnly(this.readOnly);
+						this.target.setReadOnly(true);
 					}
 					catch (Exception ex) {
 						// "read-only not supported" -> ignore, it's just a hint anyway

spring-jdbc/src/main/java/org/springframework/jdbc/datasource/init/ResourceDatabasePopulator.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2016 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -153,7 +153,7 @@ public class ResourceDatabasePopulator implements DatabasePopulator {
 	 * @see #addScript(Resource)
 	 */
 	public void setSqlScriptEncoding(String sqlScriptEncoding) {
-		this.sqlScriptEncoding = StringUtils.hasText(sqlScriptEncoding) ? sqlScriptEncoding : null;
+		this.sqlScriptEncoding = (StringUtils.hasText(sqlScriptEncoding) ? sqlScriptEncoding : null);
 	}
 
 	/**

spring-messaging/src/main/java/org/springframework/messaging/converter/ContentTypeResolver.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2013 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -17,6 +17,7 @@
 package org.springframework.messaging.converter;
 
 import org.springframework.messaging.MessageHeaders;
+import org.springframework.util.InvalidMimeTypeException;
 import org.springframework.util.MimeType;
 
 /**
@@ -29,15 +30,11 @@ public interface ContentTypeResolver {
 
 	/**
 	 * Determine the {@link MimeType} of a message from the given MessageHeaders.
-	 *
 	 * @param headers the headers to use for the resolution
-	 * @return the resolved {@code MimeType} of {@code null} if none found
-	 *
-	 * @throws org.springframework.util.InvalidMimeTypeException if the content type
-	 * 	is a String that cannot be parsed
-	 * @throws java.lang.IllegalArgumentException if there is a content type but
-	 * 	its type is unknown
+	 * @return the resolved {@code MimeType}, or {@code null} if none found
+	 * @throws InvalidMimeTypeException if the content type is a String that cannot be parsed
+	 * @throws IllegalArgumentException if there is a content type but its type is unknown
 	 */
-	MimeType resolve(MessageHeaders headers);
+	MimeType resolve(MessageHeaders headers) throws InvalidMimeTypeException;
 
 }

spring-messaging/src/main/java/org/springframework/messaging/converter/MarshallingMessageConverter.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2015 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -175,7 +175,7 @@ public class MarshallingMessageConverter extends AbstractMessageConverter {
 				payload = writer.toString();
 			}
 		}
-		catch (Exception ex) {
+		catch (Throwable ex) {
 			throw new MessageConversionException("Could not marshal XML: " + ex.getMessage(), ex);
 		}
 		return payload;

spring-messaging/src/main/java/org/springframework/messaging/handler/DestinationPatternsMessageCondition.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2015 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -190,6 +190,9 @@ public class DestinationPatternsMessageCondition extends AbstractMessageConditio
 	@Override
 	public int compareTo(DestinationPatternsMessageCondition other, Message<?> message) {
 		String destination = (String) message.getHeaders().get(LOOKUP_DESTINATION_HEADER);
+		if (destination == null) {
+			return 0;
+		}
 		Comparator<String> patternComparator = this.pathMatcher.getPatternComparator(destination);
 
 		Iterator<String> iterator = patterns.iterator();

spring-messaging/src/main/java/org/springframework/messaging/handler/invocation/AbstractExceptionHandlerMethodResolver.java

@@ -38,11 +38,14 @@ import org.springframework.util.ClassUtils;
  */
 public abstract class AbstractExceptionHandlerMethodResolver {
 
-	private static final Method NO_METHOD_FOUND = ClassUtils.getMethodIfAvailable(System.class, "currentTimeMillis");
+	private static final Method NO_METHOD_FOUND =
+			ClassUtils.getMethodIfAvailable(System.class, "currentTimeMillis");
 
-	private final Map<Class<? extends Throwable>, Method> mappedMethods = new ConcurrentHashMap<Class<? extends Throwable>, Method>(16);
+	private final Map<Class<? extends Throwable>, Method> mappedMethods =
+			new ConcurrentHashMap<Class<? extends Throwable>, Method>(16);
 
-	private final Map<Class<? extends Throwable>, Method> exceptionLookupCache = new ConcurrentHashMap<Class<? extends Throwable>, Method>(16);
+	private final Map<Class<? extends Throwable>, Method> exceptionLookupCache =
+			new ConcurrentHashMap<Class<? extends Throwable>, Method>(16);
 
 
 	/**

spring-messaging/src/main/java/org/springframework/messaging/handler/invocation/HandlerMethodReturnValueHandler.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2013 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -40,13 +40,13 @@ public interface HandlerMethodReturnValueHandler {
 	/**
 	 * Handle the given return value.
 	 * @param returnValue the value returned from the handler method
-	 * @param returnType the type of the return value. This type must have
-	 * previously been passed to
-	 * {@link #supportsReturnType(org.springframework.core.MethodParameter)}
-	 * and it must have returned {@code true}
+	 * @param returnType the type of the return value. This type must have previously
+	 * been passed to {@link #supportsReturnType(org.springframework.core.MethodParameter)}
+	 * and it must have returned {@code true}.
 	 * @param message the message that caused this method to be called
 	 * @throws Exception if the return value handling results in an error
 	 */
-	void handleReturnValue(Object returnValue, MethodParameter returnType, Message<?> message) throws Exception;
+	void handleReturnValue(Object returnValue, MethodParameter returnType, Message<?> message)
+			throws Exception;
 
 }

spring-messaging/src/main/java/org/springframework/messaging/simp/SimpAttributesContextHolder.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2014 the original author or authors.
+ * Copyright 2002-2017 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -19,7 +19,6 @@ package org.springframework.messaging.simp;
 import org.springframework.core.NamedThreadLocal;
 import org.springframework.messaging.Message;
 
-
 /**
  * Holder class to expose SiMP attributes associated with a session (e.g. WebSocket)
  * in the form of a thread-bound {@link SimpAttributes} object.