org.universAAL.middleware.brokers.message.gson.BrokerMessageSerializer.java Source code

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Here is the source code for org.universAAL.middleware.brokers.message.gson.BrokerMessageSerializer.java

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/*
    
    Copyright 2007-2014 CNR-ISTI, http://isti.cnr.it
    Institute of Information Science and Technologies
    of the Italian National Research Council
    
    See the NOTICE file distributed with this work for additional
    information regarding copyright ownership
    
    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 org.universAAL.middleware.brokers.message.gson;

import java.lang.reflect.Type;

import org.universAAL.middleware.brokers.message.BrokerMessage;
import org.universAAL.middleware.brokers.message.BrokerMessage.BrokerMessageTypes;
import org.universAAL.middleware.brokers.message.control.ControlMessage;
import org.universAAL.middleware.brokers.message.deploy.DeployMessage;

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.JsonPrimitive;
import com.google.gson.JsonSerializationContext;
import com.google.gson.JsonSerializer;

public class BrokerMessageSerializer implements JsonSerializer<BrokerMessage>, JsonDeserializer<BrokerMessage> {

    private static final String CLASSNAME = "CLASSNAME";
    private static final String INSTANCE = "INSTANCE";

    public JsonElement serialize(BrokerMessage src, Type typeOfSrc, JsonSerializationContext context) {

        JsonObject retValue = new JsonObject();
        String className = src.getClass().getCanonicalName();
        retValue.addProperty(CLASSNAME, className);
        JsonElement elem = context.serialize(src);
        retValue.add(INSTANCE, elem);
        return retValue;
    }

    public BrokerMessage deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
            throws JsonParseException {
        BrokerMessage message = null;
        JsonElement ele = json.getAsJsonObject().get("mType");
        if (ele instanceof JsonPrimitive) {
            JsonPrimitive prim = (JsonPrimitive) ele;
            String enumValue = ele.getAsString();
            BrokerMessageTypes myEyum = BrokerMessageTypes.valueOf(enumValue);
            switch (myEyum) {
            case DeployMessage:
                message = GsonParserBuilder.getInstance().fromJson(json, DeployMessage.class);
                break;
            case ControlMessage:
                message = GsonParserBuilder.getInstance().fromJson(json, ControlMessage.class);
                break;
            default:
                break;
            }

        }

        return message;

    }
}