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/*
 * Copyright 1999-2015 dangdang.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 io.shardingjdbc.orchestration.internal.json;

import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.TypeAdapter;
import lombok.AccessLevel;
import lombok.NoArgsConstructor;

import java.lang.reflect.Type;

/**
 * Gson Factor.
 *
 * @author zhangliang
 */
@NoArgsConstructor(access = AccessLevel.PRIVATE)
public final class GsonFactory {
    
    private static final GsonBuilder GSON_BUILDER = new GsonBuilder();
    
    private static volatile Gson gson = GSON_BUILDER.create();
    
    /**
     * Register gson type adapter.
     * @param type gson type
     * @param typeAdapter gson type adapter
     */
    public static synchronized void registerTypeAdapter(final Type type, final TypeAdapter typeAdapter) {
        GSON_BUILDER.registerTypeAdapter(type, typeAdapter);
        gson = GSON_BUILDER.create();
    }
    
    /**
     * Get gson instance.
     * 
     * @return gson instance
     */
    public static Gson getGson() {
        return gson;
    }
}