ro.cosu.vampires.server.util.gson.AutoValueAdapterFactory.java Source code

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Here is the source code for ro.cosu.vampires.server.util.gson.AutoValueAdapterFactory.java

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/*
 * The MIT License (MIT)
 * Copyright  2016 Cosmin Dumitru, http://cosu.ro <cosu@cosu.ro>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the Software?), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED AS IS?, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 *
 */

package ro.cosu.vampires.server.util.gson;

import com.google.gson.Gson;
import com.google.gson.TypeAdapter;
import com.google.gson.TypeAdapterFactory;
import com.google.gson.reflect.TypeToken;

public final class AutoValueAdapterFactory implements TypeAdapterFactory {
    @SuppressWarnings("unchecked")
    @Override
    public <T> TypeAdapter<T> create(Gson gson, TypeToken<T> type) {
        Class<? super T> rawType = type.getRawType();
        if (!rawType.isAnnotationPresent(AutoGson.class)) {
            return null;
        }

        String packageName = rawType.getPackage().getName();
        String className = rawType.getName().substring(packageName.length() + 1).replace('$', '_');
        String autoValueName = packageName + ".AutoValue_" + className;

        try {
            Class<?> autoValueType = Class.forName(autoValueName);
            return (TypeAdapter<T>) gson.getAdapter(autoValueType);
        } catch (ClassNotFoundException e) {
            throw new RuntimeException("Could not load AutoValue providerType " + autoValueName, e);
        }
    }
}