spring CompositeCacheOperationSource 源码
spring CompositeCacheOperationSource 代码
文件路径：/spring-context/src/main/java/org/springframework/cache/interceptor/CompositeCacheOperationSource.java
/*
* Copyright 2002-2019 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
*
* https://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 java.util.ArrayList;
import java.util.Collection;
import org.springframework.lang.Nullable;
import org.springframework.util.Assert;
/**
* Composite {@link CacheOperationSource} implementation that iterates
* over a given array of {@code CacheOperationSource} instances.
*
* @author Costin Leau
* @author Juergen Hoeller
* @since 3.1
*/
@SuppressWarnings("serial")
public class CompositeCacheOperationSource implements CacheOperationSource, Serializable {
private final CacheOperationSource[] cacheOperationSources;
/**
* Create a new CompositeCacheOperationSource for the given sources.
* @param cacheOperationSources the CacheOperationSource instances to combine
*/
public CompositeCacheOperationSource(CacheOperationSource... cacheOperationSources) {
Assert.notEmpty(cacheOperationSources, "CacheOperationSource array must not be empty");
this.cacheOperationSources = cacheOperationSources;
}
/**
* Return the {@code CacheOperationSource} instances that this
* {@code CompositeCacheOperationSource} combines.
*/
public final CacheOperationSource[] getCacheOperationSources() {
return this.cacheOperationSources;
}
@Override
public boolean isCandidateClass(Class<?> targetClass) {
for (CacheOperationSource source : this.cacheOperationSources) {
if (source.isCandidateClass(targetClass)) {
return true;
}
}
return false;
}
@Override
@Nullable
public Collection<CacheOperation> getCacheOperations(Method method, @Nullable Class<?> targetClass) {
Collection<CacheOperation> ops = null;
for (CacheOperationSource source : this.cacheOperationSources) {
Collection<CacheOperation> cacheOperations = source.getCacheOperations(method, targetClass);
if (cacheOperations != null) {
if (ops == null) {
ops = new ArrayList<>();
}
ops.addAll(cacheOperations);
}
}
return ops;
}
}
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