GsonUtils.java

/* Copyright 2014 Hoyt Summers Pittman III
*
* Licensed 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 net.saga.aeroconf.app.util;


import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.JsonDeserializationContext;
import com.google.gson.JsonDeserializer;
import com.google.gson.JsonElement;
import com.google.gson.JsonParseException;
import com.google.gson.JsonPrimitive;
import com.google.gson.JsonSerializationContext;
import com.google.gson.JsonSerializer;

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

/**
 * Utility class for getting builders and gsons which work with DevNexus
 */
public final class GsonUtils {
    private GsonUtils() {
    }


    private static final GsonBuilder builder;
    public static final Gson GSON;

    static {
        builder = new GsonBuilder();
        builder.registerTypeAdapter(Date.class, new JsonDeserializer() {
            public Date deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException {
                return new Date(json.getAsJsonPrimitive().getAsLong());
            }
        });

        builder.registerTypeAdapter(Date.class, new JsonSerializer<Date>() {
            @Override
            public JsonElement serialize(Date src, Type typeOfSrc, JsonSerializationContext
                    context) {
                return src == null ? null : new JsonPrimitive(src.getTime());
            }
        });
        GSON = builder.create();
    }

}