com.liferay.mobile.sdk.json.JSONParser.java Source code

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Here is the source code for com.liferay.mobile.sdk.json.JSONParser.java

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/**
 * Copyright (c) 2000-present Liferay, Inc. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation; either version 2.1 of the License, or (at your option)
 * any later version.
 *
 * This library is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
 * details.
 */

package com.liferay.mobile.sdk.json;

import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.JsonElement;
import com.google.gson.JsonParser;

import java.lang.reflect.Type;

import java.util.HashMap;
import java.util.Map;
import java.util.Map.Entry;

import org.json.JSONArray;
import org.json.JSONObject;

/**
 * @author Bruno Farache
 */
public class JSONParser {

    public static <T> T fromJSON(JsonElement json, Type type) throws Exception {
        return gson().fromJson(json, type);
    }

    public static <T> T fromJSON(String json, Type type) throws Exception {
        return gson().fromJson(json, type);
    }

    public static JsonElement parse(String json) {
        return parser.parse(json);
    }

    public synchronized static void registerTypeAdapter(Type type, Object adapter) {

        adapters.put(type, adapter);
        gson = null;
    }

    protected synchronized static Gson gson() {
        if (gson == null) {
            GsonBuilder builder = new GsonBuilder();

            for (Entry<Type, Object> entry : adapters.entrySet()) {
                builder.registerTypeAdapter(entry.getKey(), entry.getValue());
            }

            gson = builder.create();
        }

        return gson;
    }

    protected static Map<Type, Object> adapters = new HashMap<>();
    protected static Gson gson;
    protected static JsonParser parser = new JsonParser();

    static {
        registerTypeAdapter(JSONArray.class, new JSONArrayDeserializer());
        registerTypeAdapter(JSONObject.class, new JSONObjectDeserializer());
    }

}