SPR-7971

+ add target object to KeyGenerator

Author: Costin Leau

org.springframework.context/src/main/java/org/springframework/cache/KeyGenerator.java

@@ -26,5 +26,5 @@
  */
 public interface KeyGenerator<K> {
 
-	K extract(Method method, Object... params);
+	K extract(Object target, Method method, Object... params);
 }

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

@@ -306,6 +306,7 @@ protected class CacheOperationContext {
 
 		private CacheDefinition definition;
 		private final Collection<Cache<?, ?>> caches;
+		private final Object target;
 		private final Method method;
 		private final Object[] args;
 
@@ -318,6 +319,7 @@ public CacheOperationContext(CacheDefinition operationDefinition, Method method,
 				Object target, Class<?> targetClass) {
 			this.definition = operationDefinition;
 			this.caches = CacheAspectSupport.this.getCaches(definition);
+			this.target = target;
 			this.method = method;
 			this.args = args;
 
@@ -352,7 +354,7 @@ protected Object generateKey() {
 				return evaluator.key(definition.getKey(), method, evalContext);
 			}
 
-			return keyGenerator.extract(method, args);
+			return keyGenerator.extract(target, method, args);
 		}
 
 		protected Collection<Cache<?, ?>> getCaches() {

org.springframework.context/src/main/java/org/springframework/cache/support/DefaultKeyGenerator.java

@@ -28,7 +28,7 @@
  */
 public class DefaultKeyGenerator implements KeyGenerator<Object> {
 
-	public Object extract(Method method, Object... params) {
+	public Object extract(Object target, Method method, Object... params) {
 		if (params.length == 1) {
 			return params[0];
 		}