Java tutorial
// Licensed to Cloudera, Inc. under one // or more contributor license agreements. See the NOTICE file // distributed with this work for additional information // regarding copyright ownership. Cloudera, Inc. 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 // // 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 com.cloudera.api; import com.fasterxml.jackson.databind.AnnotationIntrospector; import com.fasterxml.jackson.databind.MapperFeature; import com.fasterxml.jackson.databind.ObjectMapper; import com.fasterxml.jackson.databind.SerializationFeature; import com.fasterxml.jackson.module.jaxb.JaxbAnnotationIntrospector; import java.text.DateFormat; import java.text.SimpleDateFormat; import java.util.Calendar; import java.util.SimpleTimeZone; /** * This class is injected to give us control over the object mapper */ public class ApiObjectMapper extends ObjectMapper { public ApiObjectMapper() { // Print the JSON with indentation (ie. pretty print) configure(SerializationFeature.INDENT_OUTPUT, true); // Allow JAX-B annotations. setAnnotationIntrospector(new AnnotationIntrospector.Pair( getSerializationConfig().getAnnotationIntrospector(), new JaxbAnnotationIntrospector())); // Make Jackson respect @XmlElementWrapper. enable(MapperFeature.USE_WRAPPER_NAME_AS_PROPERTY_NAME); // Print all dates in ISO8601 format setDateFormat(makeISODateFormat()); } public static DateFormat makeISODateFormat() { DateFormat iso8601 = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'"); Calendar cal = Calendar.getInstance(new SimpleTimeZone(0, "GMT")); iso8601.setCalendar(cal); return iso8601; } public static DateFormat makeDateFormat(String format) { DateFormat dateFormat = new SimpleDateFormat(format); Calendar cal = Calendar.getInstance(new SimpleTimeZone(0, "GMT")); dateFormat.setCalendar(cal); return dateFormat; } }