com.popdeem.sdk.core.deserializer.PDMessagesDeserializer.java Source code

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Here is the source code for com.popdeem.sdk.core.deserializer.PDMessagesDeserializer.java

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/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2015 Popdeem
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

package com.popdeem.sdk.core.deserializer;

import com.google.gson.FieldNamingPolicy;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.JsonArray;
import com.google.gson.JsonDeserializationContext;
import com.google.gson.JsonDeserializer;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.JsonParseException;
import com.google.gson.reflect.TypeToken;
import com.popdeem.sdk.core.model.PDMessage;

import java.lang.reflect.Type;
import java.util.ArrayList;

/**
 * Created by mikenolan on 23/02/16.
 */
public class PDMessagesDeserializer implements JsonDeserializer<ArrayList<PDMessage>> {

    public static Type MESSAGES_TYPE = new TypeToken<ArrayList<PDMessage>>() {
    }.getType();

    @Override
    public ArrayList<PDMessage> deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
            throws JsonParseException {
        Gson gson = new GsonBuilder().registerTypeAdapter(long.class, new PDLongDeserializer())
                .registerTypeAdapter(int.class, new PDIntDeserializer())
                .setFieldNamingPolicy(FieldNamingPolicy.LOWER_CASE_WITH_UNDERSCORES).create();

        JsonObject jsonObject = json.getAsJsonObject();
        if (jsonObject.has("messages")) {
            JsonArray array = jsonObject.getAsJsonArray("messages");
            return gson.fromJson(array, typeOfT);
        }

        return new ArrayList<>();
    }
}