com.evilco.license.common.data.holder.LicenseHolderJsonAdapter.java Source code

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Here is the source code for com.evilco.license.common.data.holder.LicenseHolderJsonAdapter.java

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/**
 * Copyright (C) 2014 Evil-Co <http://wwww.evil-co.com>
 *
 * 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 com.evilco.license.common.data.holder;

import com.google.gson.*;

import java.lang.reflect.Type;

/**
 * Allows (de-)serialization of license holders.
 * @author         Johannes "Akkarin" Donath <johannesd@evil-co.com>
 * @copyright         Copyright (C) 2014 Evil-Co <http://www.evil-co.com>
 */
public class LicenseHolderJsonAdapter implements JsonDeserializer<ILicenseHolder>, JsonSerializer<ILicenseHolder> {

    /**
     * {@inheritDoc}
     */
    @Override
    public ILicenseHolder deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
            throws JsonParseException {
        // get implementation name
        try {
            // get class instance
            Class<? extends ILicenseHolder> licenseClass = Class
                    .forName(json.getAsJsonObject().get("implementationClassName").getAsString())
                    .asSubclass(ILicenseHolder.class);

            // de-serialize
            return context.deserialize(json, licenseClass);
        } catch (ClassCastException ex) {
            throw new JsonParseException(ex.getMessage(), ex);
        } catch (ClassNotFoundException ex) {
            throw new JsonParseException(ex.getMessage(), ex);
        }
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public JsonElement serialize(ILicenseHolder src, Type typeOfSrc, JsonSerializationContext context) {
        // encode object
        JsonElement element = context.serialize(src, src.getClass());

        // append name
        element.getAsJsonObject().add("implementationClassName", context.serialize(src.getClass().getName()));

        // return modified element
        return element;
    }
}