org.catrobat.catroid.io.BackpackScriptSerializerAndDeserializer.java Source code

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Here is the source code for org.catrobat.catroid.io.BackpackScriptSerializerAndDeserializer.java

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/*
 * Catroid: An on-device visual programming system for Android devices
 * Copyright (C) 2010-2016 The Catrobat Team
 * (<http://developer.catrobat.org/credits>)
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * An additional term exception under section 7 of the GNU Affero
 * General Public License, version 3, is available at
 * http://developer.catrobat.org/license_additional_term
 *
 * This program 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package org.catrobat.catroid.io;

import android.util.Log;

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;

import org.catrobat.catroid.content.Script;

import java.lang.reflect.Type;

public class BackpackScriptSerializerAndDeserializer implements JsonSerializer<Script>, JsonDeserializer<Script> {

    private static final String TAG = BackpackScriptSerializerAndDeserializer.class.getSimpleName();
    private static final String PACKAGE_NAME = "org.catrobat.catroid.content.";

    private static final String TYPE = "scripttype";
    private static final String PROPERTY = "properties";

    @Override
    public JsonElement serialize(Script script, Type typeOfSrc, JsonSerializationContext context) {
        JsonObject jsonObject = new JsonObject();
        jsonObject.add(TYPE, new JsonPrimitive(script.getClass().getSimpleName()));
        jsonObject.add(PROPERTY, context.serialize(script, script.getClass()));
        return jsonObject;
    }

    @Override
    public Script deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
            throws JsonParseException {

        JsonObject jsonObject = json.getAsJsonObject();
        String type = jsonObject.get(TYPE).getAsString();
        JsonElement element = jsonObject.get(PROPERTY);

        try {
            return context.deserialize(element, Class.forName(PACKAGE_NAME + type));
        } catch (ClassNotFoundException e) {
            Log.e(TAG, "Could not deserialize backpacked script element!");
            throw new JsonParseException("Unknown element type: " + type, e);
        }
    }
}