Polishing

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

@@ -332,37 +332,38 @@ public class DefaultListableBeanFactory extends AbstractAutowireCapableBeanFacto
 	}
 
 	@Override
+	@SuppressWarnings("unchecked")
 	public <T> T getBean(Class<T> requiredType, Object... args) throws BeansException {
 		Assert.notNull(requiredType, "Required type must not be null");
-		String[] beanNames = getBeanNamesForType(requiredType);
+		String[] candidateNames = getBeanNamesForType(requiredType);
 
-		if (beanNames.length > 1) {
-			ArrayList<String> autowireCandidates = new ArrayList<String>();
-			for (String beanName : beanNames) {
+		if (candidateNames.length > 1) {
+			List<String> autowireCandidates = new ArrayList<String>(candidateNames.length);
+			for (String beanName : candidateNames) {
 				if (!containsBeanDefinition(beanName) || getBeanDefinition(beanName).isAutowireCandidate()) {
 					autowireCandidates.add(beanName);
 				}
 			}
 			if (autowireCandidates.size() > 0) {
-				beanNames = autowireCandidates.toArray(new String[autowireCandidates.size()]);
+				candidateNames = autowireCandidates.toArray(new String[autowireCandidates.size()]);
 			}
 		}
 
-		if (beanNames.length == 1) {
-			return getBean(beanNames[0], requiredType, args);
+		if (candidateNames.length == 1) {
+			return getBean(candidateNames[0], requiredType, args);
 		}
-		else if (beanNames.length > 1) {
+		else if (candidateNames.length > 1) {
 			Map<String, Object> candidates = new LinkedHashMap<String, Object>();
-			for (String beanName : beanNames) {
+			for (String beanName : candidateNames) {
 				candidates.put(beanName, getBean(beanName, requiredType, args));
 			}
 			String primaryCandidate = determinePrimaryCandidate(candidates, requiredType);
 			if (primaryCandidate != null) {
-				return getBean(primaryCandidate, requiredType, args);
+				return (T) candidates.get(primaryCandidate);
 			}
 			String priorityCandidate = determineHighestPriorityCandidate(candidates, requiredType);
 			if (priorityCandidate != null) {
-				return getBean(priorityCandidate, requiredType, args);
+				return (T) candidates.get(priorityCandidate);
 			}
 			throw new NoUniqueBeanDefinitionException(requiredType, candidates.keySet());
 		}
@@ -1477,7 +1478,7 @@ public class DefaultListableBeanFactory extends AbstractAutowireCapableBeanFacto
 		public DependencyObjectFactory(DependencyDescriptor descriptor, String beanName) {
 			this.descriptor = new DependencyDescriptor(descriptor);
 			this.descriptor.increaseNestingLevel();
-			this.optional = this.descriptor.getDependencyType().equals(javaUtilOptionalClass);
+			this.optional = (this.descriptor.getDependencyType() == javaUtilOptionalClass);
 			this.beanName = beanName;
 		}
 
@@ -1541,7 +1542,7 @@ public class DefaultListableBeanFactory extends AbstractAutowireCapableBeanFacto
 			if (beanDefinition == null) {
 				return null;
 			}
-			List<Object> sources = new ArrayList<Object>();
+			List<Object> sources = new ArrayList<Object>(2);
 			Method factoryMethod = beanDefinition.getResolvedFactoryMethod();
 			if (factoryMethod != null) {
 				sources.add(factoryMethod);

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2014 the original author or authors.
+ * Copyright 2002-2016 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.
@@ -48,9 +48,10 @@ public abstract class OrderUtils {
 
 	/**
 	 * Return the order on the specified {@code type}.
-	 * <p>Take care of {@link Order @Order} and {@code @javax.annotation.Priority}.
+	 * <p>Takes care of {@link Order @Order} and {@code @javax.annotation.Priority}.
 	 * @param type the type to handle
 	 * @return the order value, or {@code null} if none can be found
+	 * @see #getPriority(Class)
 	 */
 	public static Integer getOrder(Class<?> type) {
 		return getOrder(type, null);
@@ -59,9 +60,10 @@ public abstract class OrderUtils {
 	/**
 	 * Return the order on the specified {@code type}, or the specified
 	 * default value if none can be found.
-	 * <p>Take care of {@link Order @Order} and {@code @javax.annotation.Priority}.
+	 * <p>Takes care of {@link Order @Order} and {@code @javax.annotation.Priority}.
 	 * @param type the type to handle
 	 * @return the priority value, or the specified default order if none can be found
+	 * @see #getPriority(Class)
 	 */
 	public static Integer getOrder(Class<?> type, Integer defaultOrder) {
 		Order order = AnnotationUtils.findAnnotation(type, Order.class);