001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.juneau.examples.core.json;
018
019import static org.apache.juneau.commons.utils.Shorts.*;
020
021import java.util.*;
022
023import org.apache.juneau.commons.logging.*;
024import org.apache.juneau.examples.core.pojo.*;
025import org.apache.juneau.marshall.json.*;
026
027/**
028 * Sample class which shows the complex usage of JsonSerializer and JsonParser.
029 *
030 */
031public class JsonComplexExample {
032
033   /**
034    * Serializing PojoComplex bean into Json type
035    * and Deserialize back to PojoComplex instance type.
036    *
037    * @param args Unused.
038    * @throws Exception Unused.
039    */
040   public static void main(String[] args) throws Exception {
041      // Juneau provides static constants with the most commonly used configurations
042      // Get a reference to a serializer - converting POJO to flat format
043      /**
044       * Produces
045       * {"innerPojo":{"name":"name0","id":"1.0"},
046       * "values":{"setOne":[{"name":"name1","id":"1.1"},{"name":"name2","id":"1.1"}],
047       * "setTwo":[{"name":"name1","id":"1.2"},{"name":"name2","id":"1.2"}]},"id":"pojo"}
048       */
049      var jsonSerializer = JsonSerializer.DEFAULT;
050      // Get a reference to a parser - converts that flat format back into the POJO
051      var jsonParser = JsonParser.DEFAULT;
052
053      // Fill some data to a PojoComplex bean
054      Map<String,List<Pojo>> values = m();
055      List<Pojo> setOne = l();
056      setOne.add(new Pojo("1.1", "name1"));
057      setOne.add(new Pojo("1.1", "name2"));
058      List<Pojo> setTwo = l();
059      setTwo.add(new Pojo("1.2", "name1"));
060      setTwo.add(new Pojo("1.2", "name2"));
061      values.put("setOne", setOne);
062      values.put("setTwo", setTwo);
063      var pojoc = new PojoComplex("pojo", new Pojo("1.0", "name0"), values);
064
065      var flat = jsonSerializer.write(pojoc);
066
067      // Print out the created POJO in JSON format.
068      RichLogger.getLogger(JsonComplexExample.class).info(flat);
069
070      var parse = jsonParser.read(flat, PojoComplex.class);
071
072      assert parse.getId().equals(pojoc.getId());
073      assert parse.getInnerPojo().getName().equals(pojoc.getInnerPojo().getName());
074      assert parse.getInnerPojo().getId().equals(pojoc.getInnerPojo().getId());
075
076      // The object above can be parsed thanks to the @BeanCtor(properties = id,name) annotation on Pojo
077      // Using this approach, you can keep your POJOs immutable, and still serialize and deserialize them.
078   }
079}