Polishing

spring-aop/src/main/java/org/springframework/aop/interceptor/AsyncUncaughtExceptionHandler.java

@@ -19,11 +19,11 @@ package org.springframework.aop.interceptor;
 import java.lang.reflect.Method;
 
 /**
- * A strategy for handling uncaught exception thrown by asynchronous methods.
+ * A strategy for handling uncaught exceptions thrown from asynchronous methods.
  *
  * <p>An asynchronous method usually returns a {@link java.util.concurrent.Future}
- * instance that gives access to the underlying exception. When the method
- * does not provide that return type, this handler can be used to managed such
+ * instance that gives access to the underlying exception. When the method does
+ * not provide that return type, this handler can be used to managed such
  * uncaught exceptions.
  *
  * @author Stephane Nicoll
@@ -32,11 +32,11 @@ import java.lang.reflect.Method;
 public interface AsyncUncaughtExceptionHandler {
 
 	/**
-	 * Handle the given uncaught error thrown while processing
-	 * an asynchronous method.
-	 * @param ex the exception thrown by invoking the async operation
-	 * @param method the async operation
+	 * Handle the given uncaught exception thrown from an asynchronous method.
+	 * @param ex the exception thrown from the asynchronous method
+	 * @param method the asynchronous method
 	 * @param params the parameters used to invoked the method
 	 */
 	void handleUncaughtException(Throwable ex, Method method, Object... params);
+
 }

spring-context/src/main/java/org/springframework/scheduling/annotation/AnnotationAsyncExecutionInterceptor.java

@@ -40,28 +40,28 @@ import org.springframework.core.annotation.AnnotationUtils;
 public class AnnotationAsyncExecutionInterceptor extends AsyncExecutionInterceptor {
 
 	/**
-	 * Create a new {@code AnnotationAsyncExecutionInterceptor} with the given executor.
+	 * Create a new {@code AnnotationAsyncExecutionInterceptor} with the given executor
+	 * and a simple {@link AsyncUncaughtExceptionHandler}.
 	 * @param defaultExecutor the executor to be used by default if no more specific
 	 * executor has been qualified at the method level using {@link Async#value()}
-	 * @param exceptionHandler the {@link AsyncUncaughtExceptionHandler} to use to
-	 * handle exceptions thrown by asynchronous method executions with {@code void}
-	 * return type
 	 */
-	public AnnotationAsyncExecutionInterceptor(Executor defaultExecutor,
-											   AsyncUncaughtExceptionHandler exceptionHandler) {
-		super(defaultExecutor, exceptionHandler);
+	public AnnotationAsyncExecutionInterceptor(Executor defaultExecutor) {
+		this(defaultExecutor, new SimpleAsyncUncaughtExceptionHandler());
 	}
 
 	/**
-	 * Create a new {@code AnnotationAsyncExecutionInterceptor} with the given executor
-	 * and a simple {@link AsyncUncaughtExceptionHandler}.
+	 * Create a new {@code AnnotationAsyncExecutionInterceptor} with the given executor.
 	 * @param defaultExecutor the executor to be used by default if no more specific
 	 * executor has been qualified at the method level using {@link Async#value()}
+	 * @param exceptionHandler the {@link AsyncUncaughtExceptionHandler} to use to
+	 * handle exceptions thrown by asynchronous method executions with {@code void}
+	 * return type
 	 */
-	public AnnotationAsyncExecutionInterceptor(Executor defaultExecutor) {
-		this(defaultExecutor, new SimpleAsyncUncaughtExceptionHandler());
+	public AnnotationAsyncExecutionInterceptor(Executor defaultExecutor, AsyncUncaughtExceptionHandler exceptionHandler) {
+		super(defaultExecutor, exceptionHandler);
 	}
 
+
 	/**
 	 * Return the qualifier or bean name of the executor to be used when executing the
 	 * given method, specified via {@link Async#value} at the method or declaring

spring-context/src/test/java/org/springframework/context/annotation/ConfigurationClassPostProcessorTests.java

@@ -23,6 +23,7 @@ import java.lang.annotation.Target;
 
 import org.junit.Before;
 import org.junit.Test;
+
 import org.springframework.aop.scope.ScopedObject;
 import org.springframework.aop.scope.ScopedProxyUtils;
 import org.springframework.beans.factory.FactoryBean;
@@ -86,8 +87,7 @@ public class ConfigurationClassPostProcessorTests {
 	 */
 	@Test
 	public void alreadyLoadedConfigurationClasses() {
-		beanFactory.registerBeanDefinition("unloadedConfig", new RootBeanDefinition(UnloadedConfig.class.getName(),
-			null, null));
+		beanFactory.registerBeanDefinition("unloadedConfig", new RootBeanDefinition(UnloadedConfig.class.getName()));
 		beanFactory.registerBeanDefinition("loadedConfig", new RootBeanDefinition(LoadedConfig.class));
 		ConfigurationClassPostProcessor pp = new ConfigurationClassPostProcessor();
 		pp.postProcessBeanFactory(beanFactory);
@@ -126,56 +126,56 @@ public class ConfigurationClassPostProcessorTests {
 	@Test
 	public void postProcessorWorksWithComposedConfigurationWithAttributeOverridesUsingReflection() {
 		RootBeanDefinition beanDefinition = new RootBeanDefinition(
-			ComposedConfigurationWithAttributeOverridesClass.class);
+				ComposedConfigurationWithAttributeOverridesClass.class);
 		assertSupportForComposedAnnotation(beanDefinition);
 	}
 
 	@Test
 	public void postProcessorWorksWithComposedConfigurationWithAttributeOverridesUsingAsm() {
 		RootBeanDefinition beanDefinition = new RootBeanDefinition(
-			ComposedConfigurationWithAttributeOverridesClass.class.getName());
+				ComposedConfigurationWithAttributeOverridesClass.class.getName());
 		assertSupportForComposedAnnotation(beanDefinition);
 	}
 
 	@Test
 	public void postProcessorWorksWithComposedComposedConfigurationWithAttributeOverridesUsingReflection() {
 		RootBeanDefinition beanDefinition = new RootBeanDefinition(
-			ComposedComposedConfigurationWithAttributeOverridesClass.class);
+				ComposedComposedConfigurationWithAttributeOverridesClass.class);
 		assertSupportForComposedAnnotation(beanDefinition);
 	}
 
 	@Test
 	public void postProcessorWorksWithComposedComposedConfigurationWithAttributeOverridesUsingAsm() {
 		RootBeanDefinition beanDefinition = new RootBeanDefinition(
-			ComposedComposedConfigurationWithAttributeOverridesClass.class.getName());
+				ComposedComposedConfigurationWithAttributeOverridesClass.class.getName());
 		assertSupportForComposedAnnotation(beanDefinition);
 	}
 
 	@Test
 	public void postProcessorWorksWithMetaComponentScanConfigurationWithAttributeOverridesUsingReflection() {
 		RootBeanDefinition beanDefinition = new RootBeanDefinition(
-			MetaComponentScanConfigurationWithAttributeOverridesClass.class);
+				MetaComponentScanConfigurationWithAttributeOverridesClass.class);
 		assertSupportForComposedAnnotation(beanDefinition);
 	}
 
 	@Test
 	public void postProcessorWorksWithMetaComponentScanConfigurationWithAttributeOverridesUsingAsm() {
 		RootBeanDefinition beanDefinition = new RootBeanDefinition(
-			MetaComponentScanConfigurationWithAttributeOverridesClass.class.getName());
+				MetaComponentScanConfigurationWithAttributeOverridesClass.class.getName());
 		assertSupportForComposedAnnotation(beanDefinition);
 	}
 
 	@Test
 	public void postProcessorWorksWithMetaComponentScanConfigurationWithAttributeOverridesSubclassUsingReflection() {
 		RootBeanDefinition beanDefinition = new RootBeanDefinition(
-			SubMetaComponentScanConfigurationWithAttributeOverridesClass.class);
+				SubMetaComponentScanConfigurationWithAttributeOverridesClass.class);
 		assertSupportForComposedAnnotation(beanDefinition);
 	}
 
 	@Test
 	public void postProcessorWorksWithMetaComponentScanConfigurationWithAttributeOverridesSubclassUsingAsm() {
 		RootBeanDefinition beanDefinition = new RootBeanDefinition(
-			SubMetaComponentScanConfigurationWithAttributeOverridesClass.class.getName());
+				SubMetaComponentScanConfigurationWithAttributeOverridesClass.class.getName());
 		assertSupportForComposedAnnotation(beanDefinition);
 	}
 
@@ -208,8 +208,8 @@ public class ConfigurationClassPostProcessorTests {
 	public void postProcessorDoesNotOverrideRegularBeanDefinitionsEvenWithScopedProxy() {
 		RootBeanDefinition rbd = new RootBeanDefinition(TestBean.class);
 		rbd.setResource(new DescriptiveResource("XML or something"));
-		BeanDefinitionHolder proxied = ScopedProxyUtils.createScopedProxy(new BeanDefinitionHolder(rbd, "bar"),
-			beanFactory, true);
+		BeanDefinitionHolder proxied = ScopedProxyUtils.createScopedProxy(
+				new BeanDefinitionHolder(rbd, "bar"), beanFactory, true);
 		beanFactory.registerBeanDefinition("bar", proxied.getBeanDefinition());
 		beanFactory.registerBeanDefinition("config", new RootBeanDefinition(SingletonBeanConfig.class));
 		ConfigurationClassPostProcessor pp = new ConfigurationClassPostProcessor();
@@ -296,8 +296,7 @@ public class ConfigurationClassPostProcessorTests {
 		RootBeanDefinition bd = new RootBeanDefinition(RepositoryInjectionBean.class);
 		bd.setScope(RootBeanDefinition.SCOPE_PROTOTYPE);
 		beanFactory.registerBeanDefinition("annotatedBean", bd);
-		beanFactory.registerBeanDefinition("configClass", new RootBeanDefinition(
-			ScopedProxyRepositoryConfiguration.class));
+		beanFactory.registerBeanDefinition("configClass", new RootBeanDefinition(ScopedProxyRepositoryConfiguration.class));
 		ConfigurationClassPostProcessor pp = new ConfigurationClassPostProcessor();
 		pp.postProcessBeanFactory(beanFactory);
 		beanFactory.freezeConfiguration();
@@ -332,8 +331,7 @@ public class ConfigurationClassPostProcessorTests {
 		RootBeanDefinition bd = new RootBeanDefinition(RepositoryFactoryBeanInjectionBean.class);
 		bd.setScope(RootBeanDefinition.SCOPE_PROTOTYPE);
 		beanFactory.registerBeanDefinition("annotatedBean", bd);
-		beanFactory.registerBeanDefinition("configClass", new RootBeanDefinition(
-			RepositoryFactoryBeanConfiguration.class));
+		beanFactory.registerBeanDefinition("configClass", new RootBeanDefinition(RepositoryFactoryBeanConfiguration.class));
 		ConfigurationClassPostProcessor pp = new ConfigurationClassPostProcessor();
 		pp.postProcessBeanFactory(beanFactory);
 		beanFactory.preInstantiateSingletons();
@@ -374,8 +372,7 @@ public class ConfigurationClassPostProcessorTests {
 
 	@Test
 	public void genericsBasedInjectionWithWildcardWithGenericExtendsMatch() {
-		beanFactory.registerBeanDefinition("configClass", new RootBeanDefinition(
-			WildcardWithGenericExtendsConfiguration.class));
+		beanFactory.registerBeanDefinition("configClass", new RootBeanDefinition(WildcardWithGenericExtendsConfiguration.class));
 		ConfigurationClassPostProcessor pp = new ConfigurationClassPostProcessor();
 		pp.postProcessBeanFactory(beanFactory);
 
@@ -574,7 +571,6 @@ public class ConfigurationClassPostProcessorTests {
 		@Scope(value = "prototype", proxyMode = ScopedProxyMode.TARGET_CLASS)
 		public Repository<String> stringRepo() {
 			return new Repository<String>() {
-
 				@Override
 				public String toString() {
 					return "Repository<String>";
@@ -586,7 +582,6 @@ public class ConfigurationClassPostProcessorTests {
 		@Scope(value = "prototype", proxyMode = ScopedProxyMode.TARGET_CLASS)
 		public Repository<Integer> integerRepo() {
 			return new Repository<Integer>() {
-
 				@Override
 				public String toString() {
 					return "Repository<Integer>";

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2012 the original author or authors.
+ * Copyright 2002-2014 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.core.env;
 
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
+
 import org.springframework.util.Assert;
 
 /**
@@ -53,22 +54,23 @@ public abstract class EnumerablePropertySource<T> extends PropertySource<T> {
 		super(name, source);
 	}
 
+
 	/**
-	 * Return the names of all properties contained by the {@linkplain #getSource()
-	 * source} object (never {@code null}).
+	 * Return the names of all properties contained by the
+	 * {@linkplain #getSource() source} object (never {@code null}).
 	 */
 	public abstract String[] getPropertyNames();
 
 	/**
 	 * Return whether this {@code PropertySource} contains a property with the given name.
-	 * <p>This implementation checks for the presence of the given name within
-	 * the {@link #getPropertyNames()} array.
-	 * @param name the property to find
+	 * <p>This implementation checks for the presence of the given name within the
+	 * {@link #getPropertyNames()} array.
+	 * @param name the name of the property to find
 	 */
 	@Override
 	public boolean containsProperty(String name) {
-		Assert.notNull(name, "property name must not be null");
-		for (String candidate : this.getPropertyNames()) {
+		Assert.notNull(name, "Property name must not be null");
+		for (String candidate : getPropertyNames()) {
 			if (candidate.equals(name)) {
 				if (logger.isDebugEnabled()) {
 					logger.debug(String.format("PropertySource [%s] contains '%s'", getName(), name));

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2011 the original author or authors.
+ * Copyright 2002-2014 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 +18,9 @@ package org.springframework.core.env;
 
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
+
 import org.springframework.util.Assert;
+import org.springframework.util.ObjectUtils;
 
 /**
  * Abstract base class representing a source of name/value property pairs. The underlying
@@ -55,12 +57,13 @@ import org.springframework.util.Assert;
  */
 public abstract class PropertySource<T> {
 
-	protected final Log logger = LogFactory.getLog(this.getClass());
+	protected final Log logger = LogFactory.getLog(getClass());
 
 	protected final String name;
 
 	protected final T source;
 
+
 	/**
 	 * Create a new {@code PropertySource} with the given name and source object.
 	 */
@@ -83,6 +86,7 @@ public abstract class PropertySource<T> {
 		this(name, (T) new Object());
 	}
 
+
 	/**
 	 * Return the name of this {@code PropertySource}
 	 */
@@ -94,7 +98,7 @@ public abstract class PropertySource<T> {
 	 * Return the underlying source object for this {@code PropertySource}.
 	 */
 	public T getSource() {
-		return source;
+		return this.source;
 	}
 
 	/**
@@ -105,80 +109,64 @@ public abstract class PropertySource<T> {
 	 * @param name the property name to find
 	 */
 	public boolean containsProperty(String name) {
-		return this.getProperty(name) != null;
+		return (getProperty(name) != null);
 	}
 
 	/**
-	 * Return the value associated with the given name, {@code null} if not found.
+	 * Return the value associated with the given name,
+	 * or {@code null} if not found.
 	 * @param name the property to find
 	 * @see PropertyResolver#getRequiredProperty(String)
 	 */
 	public abstract Object getProperty(String name);
 
-	/**
-	 * Return a hashcode derived from the {@code name} property of this {@code PropertySource}
-	 * object.
-	 */
-	@Override
-	public int hashCode() {
-		final int prime = 31;
-		int result = 1;
-		result = prime * result + ((this.name == null) ? 0 : this.name.hashCode());
-		return result;
-	}
 
 	/**
 	 * This {@code PropertySource} object is equal to the given object if:
 	 * <ul>
-	 *   <li>they are the same instance
-	 *   <li>the {@code name} properties for both objects are equal
+	 * <li>they are the same instance
+	 * <li>the {@code name} properties for both objects are equal
 	 * </ul>
-	 *
-	 * <P>No properties other than {@code name} are evaluated.
+	 * <p>No properties other than {@code name} are evaluated.
 	 */
 	@Override
 	public boolean equals(Object obj) {
-		if (this == obj)
-			return true;
-		if (obj == null)
-			return false;
-		if (!(obj instanceof PropertySource))
-			return false;
-		PropertySource<?> other = (PropertySource<?>) obj;
-		if (this.name == null) {
-			if (other.name != null)
-				return false;
-		} else if (!this.name.equals(other.name))
-			return false;
-		return true;
+		return (this == obj || (obj instanceof PropertySource &&
+				ObjectUtils.nullSafeEquals(this.name, ((PropertySource<?>) obj).name)));
+	}
+
+	/**
+	 * Return a hash code derived from the {@code name} property
+	 * of this {@code PropertySource} object.
+	 */
+	@Override
+	public int hashCode() {
+		return ObjectUtils.nullSafeHashCode(this.name);
 	}
 
 	/**
 	 * Produce concise output (type and name) if the current log level does not include
-	 * debug. If debug is enabled, produce verbose output including hashcode of the
+	 * debug. If debug is enabled, produce verbose output including hash code of the
 	 * PropertySource instance and every name/value property pair.
-	 *
-	 * This variable verbosity is useful as a property source such as system properties
+	 * <p>This variable verbosity is useful as a property source such as system properties
 	 * or environment variables may contain an arbitrary number of property pairs,
 	 * potentially leading to difficult to read exception and log messages.
-	 *
 	 * @see Log#isDebugEnabled()
 	 */
 	@Override
 	public String toString() {
 		if (logger.isDebugEnabled()) {
 			return String.format("%s@%s [name='%s', properties=%s]",
-					this.getClass().getSimpleName(), System.identityHashCode(this), this.name, this.source);
+					getClass().getSimpleName(), System.identityHashCode(this), this.name, this.source);
+		}
+		else {
+			return String.format("%s [name='%s']", getClass().getSimpleName(), this.name);
 		}
-
-		return String.format("%s [name='%s']",
-				this.getClass().getSimpleName(), this.name);
 	}
 
 
 	/**
 	 * Return a {@code PropertySource} implementation intended for collection comparison purposes only.
-	 *
 	 * <p>Primarily for internal use, but given a collection of {@code PropertySource} objects, may be
 	 * used as follows:
 	 * <pre class="code">
@@ -189,11 +177,9 @@ public abstract class PropertySource<T> {
 	 * assert sources.contains(PropertySource.named("sourceB"));
 	 * assert !sources.contains(PropertySource.named("sourceC"));
 	 * }</pre>
-	 *
 	 * The returned {@code PropertySource} will throw {@code UnsupportedOperationException}
 	 * if any methods other than {@code equals(Object)}, {@code hashCode()}, and {@code toString()}
 	 * are called.
-	 *
 	 * @param name the name of the comparison {@code PropertySource} to be created and returned.
 	 */
 	public static PropertySource<?> named(String name) {
@@ -209,7 +195,6 @@ public abstract class PropertySource<T> {
 	 * {@code ApplicationContext}.  In such cases, a stub should be used to hold the
 	 * intended default position/order of the property source, then be replaced
 	 * during context refresh.
-	 *
 	 * @see org.springframework.context.support.AbstractApplicationContext#initPropertySources()
 	 * @see org.springframework.web.context.support.StandardServletEnvironment
 	 * @see org.springframework.web.context.support.ServletContextPropertySource
@@ -221,7 +206,7 @@ public abstract class PropertySource<T> {
 		}
 
 		/**
-		 * Always return {@code null}.
+		 * Always returns {@code null}.
 		 */
 		@Override
 		public String getProperty(String name) {

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2013 the original author or authors.
+ * Copyright 2002-2014 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.
@@ -317,7 +317,7 @@ public abstract class CollectionUtils {
 	 * Enumeration elements must be assignable to the type of the given array. The array
 	 * returned will be a different instance than the array given.
 	 */
-	public static <A,E extends A> A[] toArray(Enumeration<E> enumeration, A[] array) {
+	public static <A, E extends A> A[] toArray(Enumeration<E> enumeration, A[] array) {
 		ArrayList<A> elements = new ArrayList<A>();
 		while (enumeration.hasMoreElements()) {
 			elements.add(enumeration.nextElement());