org.apache.s4.client.util.ObjectBuilder.java Source code

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Here is the source code for org.apache.s4.client.util.ObjectBuilder.java

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/**
 * 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
 *
 *     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.apache.s4.client.util;

import org.apache.s4.message.Request;
import org.apache.s4.message.SinglePERequest;

import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;
import java.util.UUID;
import java.util.concurrent.ConcurrentHashMap;

import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.InstanceCreator;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.JsonSerializationContext;
import com.google.gson.JsonSerializer;

import flexjson.JSONDeserializer;
import flexjson.JSONSerializer;

public class ObjectBuilder {

    private ConcurrentHashMap<Class<?>, JSONDeserializer<Object>> deserializers = new ConcurrentHashMap<Class<?>, JSONDeserializer<Object>>();

    private JSONSerializer serializer = (new JSONSerializer()).exclude("class");

    // private JSONSerializer serializer = (new JSONSerializer());

    public Object fromJson(String jevent, Class<?> clazz) throws ObjectBuilder.Exception {

        JSONDeserializer<Object> deser = deserializers.get(clazz);

        if (deser == null) {
            JSONDeserializer<Object> newDeser = new JSONDeserializer<Object>();
            newDeser.use(null, clazz);

            deser = deserializers.putIfAbsent(clazz, newDeser);

            if (deser == null)
                deser = newDeser;
        }

        return deser.deserialize(jevent);

    }

    public String toJson(Object e) {
        return serializer.serialize(e);
    }

    public static class Exception extends java.lang.Exception {
        public Exception(String message) {
            super(message);
        }

        public Exception(String message, Throwable cause) {
            super(message, cause);
        }
    }

    private static class TEST {
        private int a;
        private int b;

        public void setA(int a) {
            this.a = a * 10;
        }

        public String toString() {
            return "" + a + " " + b;
        }

        public int getA() {
            return a;
        }

        public int getB() {
            return b;
        }

        public TEST(int a, int b) {
            this.a = a * 10;
            this.b = b * 10;
        }

        public TEST() {
        }
    }

    public static void main(String[] argv) throws Exception {

        ObjectBuilder b = new ObjectBuilder();

        String s = "{a:5, b:100}";
        Object out = b.fromJson(s, TEST.class);

        System.out.println(out.toString());

        TEST t = new TEST(1, 2);

        System.out.println(b.toJson(t));

        String[] query = { "name", "count", "freq" };
        String target[] = { "ACDW", "11" };

        org.apache.s4.message.Request.ClientRInfo rinfo = new org.apache.s4.message.Request.ClientRInfo();
        rinfo.setRequesterUUID(UUID.randomUUID());
        Request req = new org.apache.s4.message.SinglePERequest(Arrays.asList(target), Arrays.asList(query), rinfo);

        System.out.println(req.toString());

        InstanceCreator<org.apache.s4.message.Request.RInfo> infoCreator = new InstanceCreator<org.apache.s4.message.Request.RInfo>() {
            public org.apache.s4.message.Request.RInfo createInstance(Type type) {
                return new org.apache.s4.message.Request.ClientRInfo();
            }
        };

        Gson gson = (new GsonBuilder()).registerTypeAdapter(org.apache.s4.message.Request.RInfo.class, infoCreator)
                .registerTypeAdapter(Object.class, new ObjectTypeAdapter()).create();

        System.out.println("gson: " + gson.toJson(req));
        System.out.println("gson reversed: " + gson.fromJson(gson.toJson(req), SinglePERequest.class));

        System.out.println(b.toJson(req));
        System.out.println(b.toJson(Arrays.asList(query)));

        System.out.println("----------------------------------------------");

        ArrayList<SSTest> list = new ArrayList<SSTest>();

        SSTest ss1 = new SSTest();
        ss1.str = "list-element-1";
        SSTest ss2 = new SSTest();
        ss2.str = "list-element-2";

        list.add(ss1);
        list.add(ss2);

        Map<String, Object> listmap = new HashMap<String, Object>();
        listmap.put("ll", list);

        MapTest mt = new MapTest();
        mt.map = listmap;

        Object listmapobj = listmap;

        System.out.println("list: " + gson.toJson(list));
        System.out.println("listmap: " + gson.toJson(listmap));
        System.out.println("listmapobj: " + gson.toJson(listmapobj));
        System.out.println("mapobject: " + gson.toJson(mt));
    }

    private static class SSTest {
        public String str;
    }

    private static class MapTest {
        Map<String, Object> map;
        Map gmap;
    }

    private static class ObjectTypeAdapter implements JsonSerializer<Object> {
        public JsonElement serialize(Object src, Type typeOfSrc, JsonSerializationContext context) {

            if (src.getClass() != Object.class) {
                return context.serialize(src, src.getClass());
            }

            return new JsonObject();
        }
    }

}