Java tutorial
/* * 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. * 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.util.Collection; import org.springframework.cache.Cache; import org.springframework.cache.CacheManager; import org.springframework.lang.Nullable; /** * A simple {@link CacheResolver} that resolves the {@link Cache} instance(s) * based on a configurable {@link CacheManager} and the name of the * cache(s) as provided by {@link BasicOperation#getCacheNames() getCacheNames()}. * * @author Stephane Nicoll * @author Juergen Hoeller * @since 4.1 * @see BasicOperation#getCacheNames() */ public class SimpleCacheResolver extends AbstractCacheResolver { /** * Construct a new {@code SimpleCacheResolver}. * @see #setCacheManager */ public SimpleCacheResolver() { } /** * Construct a new {@code SimpleCacheResolver} for the given {@link CacheManager}. * @param cacheManager the CacheManager to use */ public SimpleCacheResolver(CacheManager cacheManager) { super(cacheManager); } @Override protected Collection<String> getCacheNames(CacheOperationInvocationContext<?> context) { return context.getOperation().getCacheNames(); } /** * Return a {@code SimpleCacheResolver} for the given {@link CacheManager}. * @param cacheManager the CacheManager (potentially {@code null}) * @return the SimpleCacheResolver ({@code null} if the CacheManager was {@code null}) * @since 5.1 */ @Nullable static SimpleCacheResolver of(@Nullable CacheManager cacheManager) { return (cacheManager != null ? new SimpleCacheResolver(cacheManager) : null); } }