/* * Copyright (c) 2010 Lockheed Martin Corporation * * 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.eurekastreams.server.persistence.mappers.cache; import org.eurekastreams.server.persistence.mappers.DomainMapper; import org.eurekastreams.server.persistence.mappers.stream.CachedDomainMapper; /** * Generic mapper to retrieve single values named using the input request. * * @param <TRequestType> * Request type; toString must return the value used in the cache key. * @param <TReturnType> * Return type. */ public class GetKeyedSingleValueCacheMapper<TRequestType, TReturnType> extends CachedDomainMapper implements DomainMapper<TRequestType, TReturnType> { /** Prefix on the cache key. */ private String keyPrefix; /** * Constructor. * * @param inKeyPrefix * Prefix on the cache key. */ public GetKeyedSingleValueCacheMapper(final String inKeyPrefix) { keyPrefix = inKeyPrefix; } /** * {@inheritDoc} */ @Override public TReturnType execute(final TRequestType inRequest) { return (TReturnType) getCache().get(keyPrefix + inRequest.toString()); } }