Java tutorial
/** * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you 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 * <p> * http://www.apache.org/licenses/LICENSE-2.0 * <p> * 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.apache.gora.couchdb.util; import com.fasterxml.jackson.annotation.JsonInclude; import com.fasterxml.jackson.databind.ObjectMapper; import com.fasterxml.jackson.databind.SerializationFeature; import org.ektorp.CouchDbConnector; import org.ektorp.impl.ObjectMapperFactory; import org.ektorp.impl.jackson.EktorpJacksonModule; /** * This class is implemantation of {@link org.ektorp.impl.ObjectMapperFactory}. * Created a object mapper instance. */ public class CouchDBObjectMapperFactory implements ObjectMapperFactory { private ObjectMapper instance; private boolean writeDatesAsTimestamps = false; /** * Create a object mapper instance * * @return */ public synchronized ObjectMapper createObjectMapper() { if (instance == null) { instance = new ObjectMapper(); applyDefaultConfiguration(instance); } return instance; } /** * Create a object mapper object via couchdb connector * * @param connector * @return */ public synchronized ObjectMapper createObjectMapper(CouchDbConnector connector) { this.createObjectMapper(); instance.registerModule(new EktorpJacksonModule(connector, instance)); return instance; } /** * Apply default configuration * * @param om a object mapper object */ private void applyDefaultConfiguration(ObjectMapper om) { om.configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, this.writeDatesAsTimestamps); om.getSerializationConfig().withSerializationInclusion(JsonInclude.Include.NON_NULL); } }