Polishing

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2017 the original author or authors.
+ * Copyright 2002-2018 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.
@@ -31,6 +31,7 @@ import org.springframework.util.Assert;
  * invocation context.
  *
  * @author Stephane Nicoll
+ * @author Juergen Hoeller
  * @since 4.1
  */
 public abstract class AbstractCacheResolver implements CacheResolver, InitializingBean {
@@ -38,9 +39,17 @@ public abstract class AbstractCacheResolver implements CacheResolver, Initializi
 	private CacheManager cacheManager;
 
 
+	/**
+	 * Construct a new {@code AbstractCacheResolver}.
+	 * @see #setCacheManager
+	 */
 	protected AbstractCacheResolver() {
 	}
 
+	/**
+	 * Construct a new {@code AbstractCacheResolver} for the given {@link CacheManager}.
+	 * @param cacheManager the CacheManager to use
+	 */
 	protected AbstractCacheResolver(CacheManager cacheManager) {
 		this.cacheManager = cacheManager;
 	}
@@ -72,18 +81,16 @@ public abstract class AbstractCacheResolver implements CacheResolver, Initializi
 		if (cacheNames == null) {
 			return Collections.emptyList();
 		}
-		else {
-			Collection<Cache> result = new ArrayList<Cache>();
-			for (String cacheName : cacheNames) {
-				Cache cache = getCacheManager().getCache(cacheName);
-				if (cache == null) {
-					throw new IllegalArgumentException("Cannot find cache named '" +
-							cacheName + "' for " + context.getOperation());
-				}
-				result.add(cache);
+		Collection<Cache> result = new ArrayList<Cache>(cacheNames.size());
+		for (String cacheName : cacheNames) {
+			Cache cache = getCacheManager().getCache(cacheName);
+			if (cache == null) {
+				throw new IllegalArgumentException("Cannot find cache named '" +
+						cacheName + "' for " + context.getOperation());
 			}
-			return result;
+			result.add(cache);
 		}
+		return result;
 	}
 
 	/**