revise cache API

+ add missing files (remember to check "show unversioned files")

org.springframework.context/src/main/java/org/springframework/cache/annotation/AnnotationCacheOperationSource.java

+/*
+ * Copyright 2010-2011 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.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.cache.annotation;
+
+import java.io.Serializable;
+import java.lang.reflect.AnnotatedElement;
+import java.lang.reflect.Method;
+import java.util.Collections;
+import java.util.LinkedHashSet;
+import java.util.Set;
+
+import org.springframework.cache.interceptor.AbstractFallbackCacheOperationSource;
+import org.springframework.cache.interceptor.CacheOperation;
+import org.springframework.util.Assert;
+
+/**
+ * 
+ * Implementation of the {@link org.springframework.cache.interceptor.CacheOperationSource}
+ * interface for working with caching metadata in JDK 1.5+ annotation format.
+ *
+ * <p>This class reads Spring's JDK 1.5+ {@link Cacheable} and {@link CacheEvict} 
+ * annotations and exposes corresponding caching operation definition to Spring's cache infrastructure.
+ * This class may also serve as base class for a custom CacheOperationSource.
+ *
+ * @author Costin Leau
+ */
+@SuppressWarnings("serial")
+public class AnnotationCacheOperationSource extends AbstractFallbackCacheOperationSource implements
+		Serializable {
+
+	private final boolean publicMethodsOnly;
+
+	private final Set<CacheAnnotationParser> annotationParsers;
+
+	/**
+	 * Create a default AnnotationCacheOperationSource, supporting
+	 * public methods that carry the <code>Cacheable</code> and <code>CacheEvict</code>
+	 * annotations.
+	 */
+	public AnnotationCacheOperationSource() {
+		this(true);
+	}
+
+	/**
+	 * Create a custom AnnotationCacheOperationSource, supporting
+	 * public methods that carry the <code>Cacheable</code> and 
+	 * <code>CacheEvict</code> annotations.
+	 *  
+	 * @param publicMethodsOnly whether to support only annotated public methods
+	 * typically for use with proxy-based AOP), or protected/private methods as well
+	 * (typically used with AspectJ class weaving)
+	 */
+	public AnnotationCacheOperationSource(boolean publicMethodsOnly) {
+		this.publicMethodsOnly = publicMethodsOnly;
+		this.annotationParsers = new LinkedHashSet<CacheAnnotationParser>(1);
+		this.annotationParsers.add(new SpringCachingAnnotationParser());
+	}
+
+	/**
+	 * Create a custom AnnotationCacheOperationSource.
+	 * @param annotationParsers the CacheAnnotationParser to use
+	 */
+	public AnnotationCacheOperationSource(CacheAnnotationParser... annotationParsers) {
+		this.publicMethodsOnly = true;
+		Assert.notEmpty(annotationParsers, "At least one CacheAnnotationParser needs to be specified");
+		Set<CacheAnnotationParser> parsers = new LinkedHashSet<CacheAnnotationParser>(annotationParsers.length);
+		Collections.addAll(parsers, annotationParsers);
+		this.annotationParsers = parsers;
+	}
+
+	@Override
+	protected CacheOperation findCacheOperation(Class<?> clazz) {
+		return determineCacheOperation(clazz);
+	}
+
+	@Override
+	protected CacheOperation findCacheOperation(Method method) {
+		return determineCacheOperation(method);
+	}
+
+	/**
+	 * Determine the cache operation definition for the given method or class.
+	 * <p>This implementation delegates to configured
+	 * {@link CacheAnnotationParser CacheAnnotationParsers}
+	 * for parsing known annotations into Spring's metadata attribute class.
+	 * Returns <code>null</code> if it's not cacheable.
+	 * <p>Can be overridden to support custom annotations that carry caching metadata.
+	 * @param ae the annotated method or class
+	 * @return CacheOperation the configured caching operation,
+	 * or <code>null</code> if none was found
+	 */
+	protected CacheOperation determineCacheOperation(AnnotatedElement ae) {
+		for (CacheAnnotationParser annotationParser : this.annotationParsers) {
+			CacheOperation attr = annotationParser.parseCacheAnnotation(ae);
+			if (attr != null) {
+				return attr;
+			}
+		}
+		return null;
+	}
+
+	/**
+	 * By default, only public methods can be made cacheable.
+	 */
+	@Override
+	protected boolean allowPublicMethodsOnly() {
+		return this.publicMethodsOnly;
+	}
+}
\ No newline at end of file

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

+/*
+ * Copyright 2010-2011 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.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.cache.interceptor;
+
+import java.lang.reflect.Method;
+import java.lang.reflect.Modifier;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.springframework.core.BridgeMethodResolver;
+import org.springframework.util.ClassUtils;
+import org.springframework.util.ObjectUtils;
+
+/**
+ * Abstract implementation of {@link CacheOperation} that caches
+ * attributes for methods and implements a fallback policy: 1. specific target
+ * method; 2. target class; 3. declaring method; 4. declaring class/interface.
+ *
+ * <p>Defaults to using the target class's caching attribute if none is
+ * associated with the target method. Any caching attribute associated with
+ * the target method completely overrides a class caching attribute.
+ * If none found on the target class, the interface that the invoked method
+ * has been called through (in case of a JDK proxy) will be checked.
+ *
+ * <p>This implementation caches attributes by method after they are first used.
+ * If it is ever desirable to allow dynamic changing of cacheable attributes
+ * (which is very unlikely), caching could be made configurable.
+
+ * @author Costin Leau
+ * @see org.springframework.transaction.interceptor.AbstractFallbackTransactionAttributeSource
+ */
+public abstract class AbstractFallbackCacheOperationSource implements CacheOperationSource {
+
+	/**
+	 * Canonical value held in cache to indicate no caching attribute was
+	 * found for this method and we don't need to look again.
+	 */
+	private final static CacheOperation NULL_CACHING_ATTRIBUTE = new CacheUpdateOperation();
+
+	/**
+	 * Logger available to subclasses.
+	 * <p>As this base class is not marked Serializable, the logger will be recreated
+	 * after serialization - provided that the concrete subclass is Serializable.
+	 */
+	protected final Log logger = LogFactory.getLog(getClass());
+
+	/**
+	 * Cache of CacheOperationDefinitions, keyed by DefaultCacheKey (Method + target Class).
+	 * <p>As this base class is not marked Serializable, the cache will be recreated
+	 * after serialization - provided that the concrete subclass is Serializable.
+	 */
+	final Map<Object, CacheOperation> attributeCache = new ConcurrentHashMap<Object, CacheOperation>();
+
+	/**
+	 * Determine the caching attribute for this method invocation.
+	 * <p>Defaults to the class's caching attribute if no method attribute is found.
+	 * @param method the method for the current invocation (never <code>null</code>)
+	 * @param targetClass the target class for this invocation (may be <code>null</code>)
+	 * @return {@link CacheOperation} for this method, or <code>null</code> if the method
+	 * is not cacheable
+	 */
+	public CacheOperation getCacheOperation(Method method, Class<?> targetClass) {
+		// First, see if we have a cached value.
+		Object cacheKey = getCacheKey(method, targetClass);
+		CacheOperation cached = this.attributeCache.get(cacheKey);
+		if (cached != null) {
+			if (cached == NULL_CACHING_ATTRIBUTE) {
+				return null;
+			}
+			// Value will either be canonical value indicating there is no caching attribute,
+			// or an actual caching attribute.
+			return cached;
+		}
+		else {
+			// We need to work it out.
+			CacheOperation cacheDef = computeCacheOperationDefinition(method, targetClass);
+			// Put it in the cache.
+			if (cacheDef == null) {
+				this.attributeCache.put(cacheKey, NULL_CACHING_ATTRIBUTE);
+			}
+			else {
+				if (logger.isDebugEnabled()) {
+					logger.debug("Adding cacheable method '" + method.getName() + "' with attribute: " + cacheDef);
+				}
+				this.attributeCache.put(cacheKey, cacheDef);
+			}
+			return cacheDef;
+		}
+	}
+
+	/**
+	 * Determine a cache key for the given method and target class.
+	 * <p>Must not produce same key for overloaded methods.
+	 * Must produce same key for different instances of the same method.
+	 * @param method the method (never <code>null</code>)
+	 * @param targetClass the target class (may be <code>null</code>)
+	 * @return the cache key (never <code>null</code>)
+	 */
+	protected Object getCacheKey(Method method, Class<?> targetClass) {
+		return new DefaultCacheKey(method, targetClass);
+	}
+
+	/**
+	 * Same signature as {@link #getTransactionAttribute}, but doesn't cache the result.
+	 * {@link #getTransactionAttribute} is effectively a caching decorator for this method.
+	 * @see #getTransactionAttribute
+	 */
+	private CacheOperation computeCacheOperationDefinition(Method method, Class<?> targetClass) {
+		// Don't allow no-public methods as required.
+		if (allowPublicMethodsOnly() && !Modifier.isPublic(method.getModifiers())) {
+			return null;
+		}
+
+		// The method may be on an interface, but we need attributes from the target class.
+		// If the target class is null, the method will be unchanged.
+		Method specificMethod = ClassUtils.getMostSpecificMethod(method, targetClass);
+		// If we are dealing with method with generic parameters, find the original method.
+		specificMethod = BridgeMethodResolver.findBridgedMethod(specificMethod);
+
+		// First try is the method in the target class.
+		CacheOperation opDef = findCacheOperation(specificMethod);
+		if (opDef != null) {
+			return opDef;
+		}
+
+		// Second try is the caching operation on the target class.
+		opDef = findCacheOperation(specificMethod.getDeclaringClass());
+		if (opDef != null) {
+			return opDef;
+		}
+
+		if (specificMethod != method) {
+			// Fall back is to look at the original method.
+			opDef = findCacheOperation(method);
+			if (opDef != null) {
+				return opDef;
+			}
+			// Last fall back is the class of the original method.
+			return findCacheOperation(method.getDeclaringClass());
+		}
+		return null;
+	}
+
+	/**
+	 * Subclasses need to implement this to return the caching attribute
+	 * for the given method, if any.
+	 * @param method the method to retrieve the attribute for
+	 * @return all caching attribute associated with this method
+	 * (or <code>null</code> if none)
+	 */
+	protected abstract CacheOperation findCacheOperation(Method method);
+
+	/**
+	 * Subclasses need to implement this to return the caching attribute
+	 * for the given class, if any.
+	 * @param clazz the class to retrieve the attribute for
+	 * @return all caching attribute associated with this class
+	 * (or <code>null</code> if none)
+	 */
+	protected abstract CacheOperation findCacheOperation(Class<?> clazz);
+
+	/**
+	 * Should only public methods be allowed to have caching semantics?
+	 * <p>The default implementation returns <code>false</code>.
+	 */
+	protected boolean allowPublicMethodsOnly() {
+		return false;
+	}
+
+	/**
+	 * Default cache key for the CacheOperationDefinition cache.
+	 */
+	private static class DefaultCacheKey {
+
+		private final Method method;
+
+		private final Class<?> targetClass;
+
+		public DefaultCacheKey(Method method, Class<?> targetClass) {
+			this.method = method;
+			this.targetClass = targetClass;
+		}
+
+		@Override
+		public boolean equals(Object other) {
+			if (this == other) {
+				return true;
+			}
+			if (!(other instanceof DefaultCacheKey)) {
+				return false;
+			}
+			DefaultCacheKey otherKey = (DefaultCacheKey) other;
+			return (this.method.equals(otherKey.method) && ObjectUtils.nullSafeEquals(this.targetClass,
+					otherKey.targetClass));
+		}
+
+		@Override
+		public int hashCode() {
+			return this.method.hashCode() * 29 + (this.targetClass != null ? this.targetClass.hashCode() : 0);
+		}
+	}
+}
\ No newline at end of file

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

+/*
+ * Copyright 2010-2011 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.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.cache.interceptor;
+
+import org.springframework.aop.ClassFilter;
+import org.springframework.aop.Pointcut;
+import org.springframework.aop.support.AbstractBeanFactoryPointcutAdvisor;
+
+/**
+ * Advisor driven by a {@link CacheOperationSource}, used to include a
+ * cache advice bean for methods that are cacheable.
+ * 
+ * @author Costin Leau
+ */
+@SuppressWarnings("serial")
+public class BeanFactoryCacheOperationSourceAdvisor extends AbstractBeanFactoryPointcutAdvisor {
+
+	private CacheOperationSource cacheDefinitionSource;
+
+	private final CacheOperationSourcePointcut pointcut = new CacheOperationSourcePointcut() {
+		@Override
+		protected CacheOperationSource getCacheOperationSource() {
+			return cacheDefinitionSource;
+		}
+	};
+
+	/**
+	 * Set the cache operation attribute source which is used to find cache
+	 * attributes. This should usually be identical to the source reference
+	 * set on the cache interceptor itself.
+	 * @see CacheInterceptor#setCacheAttributeSource
+	 */
+	public void setCacheDefinitionSource(CacheOperationSource cacheDefinitionSource) {
+		this.cacheDefinitionSource = cacheDefinitionSource;
+	}
+
+	/**
+	 * Set the {@link ClassFilter} to use for this pointcut.
+	 * Default is {@link ClassFilter#TRUE}.
+	 */
+	public void setClassFilter(ClassFilter classFilter) {
+		this.pointcut.setClassFilter(classFilter);
+	}
+
+	public Pointcut getPointcut() {
+		return this.pointcut;
+	}
+}
\ No newline at end of file

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

+/*
+ * Copyright 2010-2011 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.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.cache.interceptor;
+
+/**
+ * Class describing an 'evict' operation.  
+ * 
+ * @author Costin Leau
+ */
+public class CacheEvictOperation extends CacheOperation {
+
+	private boolean cacheWide = false;
+
+	public boolean isCacheWide() {
+		return cacheWide;
+	}
+
+	public void setCacheWide(boolean cacheWide) {
+		this.cacheWide = cacheWide;
+	}
+
+	@Override
+	protected StringBuilder getOperationDescription() {
+		StringBuilder sb = super.getOperationDescription();
+		sb.append(",");
+		sb.append(cacheWide);
+		return sb;
+	}
+}

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

+/*
+ * Copyright 2010-2011 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.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.cache.interceptor;
+
+import java.util.Collections;
+import java.util.LinkedHashSet;
+import java.util.Set;
+
+import org.springframework.util.Assert;
+
+/**
+ * Base class implementing {@link CacheOperation}.
+ *  
+ * @author Costin Leau
+ */
+public abstract class CacheOperation {
+
+	private Set<String> cacheNames = Collections.emptySet();
+	private String condition = "";
+	private String key = "";
+	private String name = "";
+
+
+	public Set<String> getCacheNames() {
+		return cacheNames;
+	}
+
+	public String getCondition() {
+		return condition;
+	}
+
+	public String getKey() {
+		return key;
+	}
+
+	public String getName() {
+		return name;
+	}
+
+	public void setCacheName(String cacheName) {
+		Assert.hasText(cacheName);
+		this.cacheNames = Collections.singleton(cacheName);
+	}
+
+	public void setCacheNames(String[] cacheNames) {
+		Assert.notEmpty(cacheNames);
+		this.cacheNames = new LinkedHashSet<String>(cacheNames.length);
+		for (String string : cacheNames) {
+			this.cacheNames.add(string);
+		}
+	}
+
+	public void setCondition(String condition) {
+		Assert.notNull(condition);
+		this.condition = condition;
+	}
+
+	public void setKey(String key) {
+		Assert.notNull(key);
+		this.key = key;
+	}
+
+	public void setName(String name) {
+		Assert.hasText(name);
+		this.name = name;
+	}
+
+	/**
+	 * This implementation compares the <code>toString()</code> results.
+	 * @see #toString()
+	 */
+	@Override
+	public boolean equals(Object other) {
+		return (other instanceof CacheOperation && toString().equals(other.toString()));
+	}
+
+	/**
+	 * This implementation returns <code>toString()</code>'s hash code.
+	 * @see #toString()
+	 */
+	@Override
+	public int hashCode() {
+		return toString().hashCode();
+	}
+
+	/**
+	 * Return an identifying description for this cache operation.
+	 * <p>Has to be overridden in subclasses for correct <code>equals</code>
+	 * and <code>hashCode</code> behavior. Alternatively, {@link #equals}
+	 * and {@link #hashCode} can be overridden themselves.
+	 */
+	@Override
+	public String toString() {
+		return getOperationDescription().toString();
+	}
+
+	/**
+	 * Return an identifying description for this caching operation.
+	 * <p>Available to subclasses, for inclusion in their <code>toString()</code> result.
+	 */
+	protected StringBuilder getOperationDescription() {
+		StringBuilder result = new StringBuilder();
+		result.append("CacheDefinition[");
+		result.append(name);
+		result.append("] caches=");
+		result.append(cacheNames);
+		result.append(" | condition='");
+		result.append(condition);
+		result.append("' | key='");
+		result.append(key);
+		result.append("'");
+		return result;
+	}
+}
\ No newline at end of file

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

+/*
+ * Copyright 2010-2011 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.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.cache.interceptor;
+
+import java.lang.reflect.Method;
+
+
+/**
+ * Interface used by CacheInterceptor. Implementations know
+ * how to source cache operation attributes, whether from configuration,
+ * metadata attributes at source level, or anywhere else.
+ * 
+ * @author Costin Leau
+ */
+public interface CacheOperationSource {
+
+	/**
+	 * Return the cache operation definition for this method.
+	 * Return null if the method is not cacheable.
+	 * @param method method
+	 * @param targetClass target class. May be <code>null</code>, in which
+	 * case the declaring class of the method must be used.
+	 * @return {@link CacheOperation} the matching cache operation,
+	 * or <code>null</code> if none found
+	 */
+	CacheOperation getCacheOperation(Method method, Class<?> targetClass);
+}

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

+/*
+ * Copyright 2010-2011 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.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.cache.interceptor;
+
+import java.io.Serializable;
+import java.lang.reflect.Method;
+
+import org.springframework.aop.support.StaticMethodMatcherPointcut;
+import org.springframework.util.ObjectUtils;
+
+/**
+ * Inner class that implements a Pointcut that matches if the underlying
+ * {@link CacheOperationSource} has an attribute for a given method.
+ *
+ * @author Costin Leau
+ */
+@SuppressWarnings("serial")
+abstract class CacheOperationSourcePointcut extends StaticMethodMatcherPointcut implements Serializable {
+
+	public boolean matches(Method method, Class<?> targetClass) {
+		CacheOperationSource cas = getCacheOperationSource();
+		return (cas == null || cas.getCacheOperation(method, targetClass) != null);
+	}
+
+	@Override
+	public boolean equals(Object other) {
+		if (this == other) {
+			return true;
+		}
+		if (!(other instanceof CacheOperationSourcePointcut)) {
+			return false;
+		}
+		CacheOperationSourcePointcut otherPc = (CacheOperationSourcePointcut) other;
+		return ObjectUtils.nullSafeEquals(getCacheOperationSource(),
+				otherPc.getCacheOperationSource());
+	}
+
+	@Override
+	public int hashCode() {
+		return CacheOperationSourcePointcut.class.hashCode();
+	}
+
+	@Override
+	public String toString() {
+		return getClass().getName() + ": " + getCacheOperationSource();
+	}
+
+
+	/**
+	 * Obtain the underlying CacheOperationDefinitionSource (may be <code>null</code>).
+	 * To be implemented by subclasses.
+	 */
+	protected abstract CacheOperationSource getCacheOperationSource();
+}
\ No newline at end of file

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

+/*
+ * Copyright 2010-2011 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.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.cache.interceptor;
+
+/**
+ * Class describing an 'update' operation.    
+ * 
+ * @author Costin Leau
+ */
+public class CacheUpdateOperation extends CacheOperation {
+
+}

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

+/*
+ * Copyright 2010-2011 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.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.cache.interceptor;
+
+import java.io.Serializable;
+import java.lang.reflect.Method;
+
+import org.springframework.util.Assert;
+
+/**
+ * Composite {@link CacheOperationSource} implementation that iterates
+ * over a given array of {@link CacheOperationSource} instances.
+ * 
+ * @author Costin Leau
+ */
+@SuppressWarnings("serial")
+public class CompositeCacheOperationSource implements CacheOperationSource, Serializable {
+
+	private final CacheOperationSource[] cacheDefinitionSources;
+
+	/**
+	 * Create a new CompositeCachingDefinitionSource for the given sources.
+	 * @param cacheDefinitionSourcess the CacheDefinitionSource instances to combine
+	 */
+	public CompositeCacheOperationSource(CacheOperationSource[] cacheDefinitionSources) {
+		Assert.notNull(cacheDefinitionSources, "cacheDefinitionSource array must not be null");
+		this.cacheDefinitionSources = cacheDefinitionSources;
+	}
+
+	/**
+	 * Return the CacheDefinitionSource instances that this
+	 * CompositeCachingDefinitionSource combines.
+	 */
+	public final CacheOperationSource[] getCacheDefinitionSources() {
+		return this.cacheDefinitionSources;
+	}
+
+
+	public CacheOperation getCacheOperation(Method method, Class<?> targetClass) {
+		for (CacheOperationSource source : cacheDefinitionSources) {
+			CacheOperation definition = source.getCacheOperation(method, targetClass);
+			if (definition != null) {
+				return definition;
+			}
+		}
+
+		return null;
+	}
+}
\ No newline at end of file

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

+/*
+ * Copyright 2011 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.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.cache.interceptor;
+
+import org.springframework.cache.Cache.ValueWrapper;
+
+/**
+ * Default implementation for {@link org.springframework.cache.Cache.ValueWrapper}.
+ * 
+ * @author Costin Leau
+ */
+public class DefaultValue<V> implements ValueWrapper<V> {
+
+	private final V value;
+
+	public DefaultValue(V value) {
+		this.value = value;
+	}
+
+	public V get() {
+		return value;
+	}
+}