001/* 002 * Copyright 2002-2019 the original author or authors. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * https://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016 017package org.springframework.cache.interceptor; 018 019import java.io.Serializable; 020import java.lang.reflect.Method; 021import java.util.ArrayList; 022import java.util.Collection; 023 024import org.springframework.util.Assert; 025 026/** 027 * Composite {@link CacheOperationSource} implementation that iterates 028 * over a given array of {@code CacheOperationSource} instances. 029 * 030 * @author Costin Leau 031 * @author Juergen Hoeller 032 * @since 3.1 033 */ 034@SuppressWarnings("serial") 035public class CompositeCacheOperationSource implements CacheOperationSource, Serializable { 036 037 private final CacheOperationSource[] cacheOperationSources; 038 039 040 /** 041 * Create a new CompositeCacheOperationSource for the given sources. 042 * @param cacheOperationSources the CacheOperationSource instances to combine 043 */ 044 public CompositeCacheOperationSource(CacheOperationSource... cacheOperationSources) { 045 Assert.notEmpty(cacheOperationSources, "CacheOperationSource array must not be empty"); 046 this.cacheOperationSources = cacheOperationSources; 047 } 048 049 /** 050 * Return the {@code CacheOperationSource} instances that this 051 * {@code CompositeCacheOperationSource} combines. 052 */ 053 public final CacheOperationSource[] getCacheOperationSources() { 054 return this.cacheOperationSources; 055 } 056 057 058 @Override 059 public Collection<CacheOperation> getCacheOperations(Method method, Class<?> targetClass) { 060 Collection<CacheOperation> ops = null; 061 for (CacheOperationSource source : this.cacheOperationSources) { 062 Collection<CacheOperation> cacheOperations = source.getCacheOperations(method, targetClass); 063 if (cacheOperations != null) { 064 if (ops == null) { 065 ops = new ArrayList<CacheOperation>(); 066 } 067 ops.addAll(cacheOperations); 068 } 069 } 070 return ops; 071 } 072 073}