com.softwaremagico.tm.json.InterfaceAdapter.java Source code

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Here is the source code for com.softwaremagico.tm.json.InterfaceAdapter.java

Source

package com.softwaremagico.tm.json;

/*-
 * #%L
 * Think Machine (Core)
 * %%
 * Copyright (C) 2017 - 2018 Softwaremagico
 * %%
 * This software is designed by Jorge Hortelano Otero. Jorge Hortelano Otero
 * <softwaremagico@gmail.com> Valencia (Spain).
 *  
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by the Free Software
 * Foundation; either version 2 of the License, or (at your option) any later
 * version.
 *  
 * 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 General Public License for more
 * details.
 *  
 * You should have received a copy of the GNU General Public License along with
 * this program; If not, see <http://www.gnu.org/licenses/gpl-3.0.html>.
 * #L%
 */

import java.lang.reflect.Type;

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 InterfaceAdapter<T> implements JsonSerializer<T>, JsonDeserializer<T> {

    private static final String JSON_CLASSNAME = "classname";
    private static final String JSON_DATA = "data";

    @Override
    public T deserialize(JsonElement jsonElement, Type type, JsonDeserializationContext jsonDeserializationContext)
            throws JsonParseException {

        JsonObject jsonObject = jsonElement.getAsJsonObject();
        JsonPrimitive prim = (JsonPrimitive) jsonObject.get(JSON_CLASSNAME);
        if (prim == null) {
            return null;
        }
        String className = prim.getAsString();
        return jsonDeserializationContext.deserialize(jsonObject.get(JSON_DATA), getObjectClass(className));
    }

    @Override
    public JsonElement serialize(T jsonElement, Type type, JsonSerializationContext jsonSerializationContext) {
        JsonObject jsonObject = new JsonObject();
        jsonObject.addProperty(JSON_CLASSNAME, jsonElement.getClass().getName());
        jsonObject.add(JSON_DATA, jsonSerializationContext.serialize(jsonElement));
        return jsonObject;
    }

    public Class<?> getObjectClass(String className) {
        try {
            return Class.forName(className);
        } catch (ClassNotFoundException e) {
            throw new JsonParseException(e.getMessage());
        }
    }
}