content: //
  // Licensed to the Apache Software Foundation (ASF) under one
  // or more contributor license agreements.  See the NOTICE file
  // distributed with this work for additional information
  // regarding copyright ownership.  The ASF licenses this file
  // to you 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.cloud.agent.transport;
  
  import java.lang.reflect.Type;
  import java.util.Map;
  
  import com.google.gson.Gson;
  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.JsonSerializationContext;
  import com.google.gson.JsonSerializer;
  
  import com.cloud.utils.exception.CloudRuntimeException;
  
  public class InterfaceTypeAdaptor<T> implements JsonDeserializer<T>, JsonSerializer<T> {
  
      protected Gson _gson = null;
  
      public InterfaceTypeAdaptor() {
      }
  
      public void initGson(Gson gson) {
          _gson = gson;
      }
  
      @Override
      public JsonElement serialize(T src, Type typeOfSrc, JsonSerializationContext context) {
          JsonObject obj = new JsonObject();
          obj.add(src.getClass().getName(), _gson.toJsonTree(src));
          return obj;
      }
  
      @Override
      @SuppressWarnings("unchecked")
      public T deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException {
          JsonObject element = (JsonObject)json;
          Map.Entry<String, JsonElement> entry = element.entrySet().iterator().next();
          String name = entry.getKey();
          Class<?> clazz;
          try {
              clazz = Class.forName(name);
          } catch (ClassNotFoundException e) {
              throw new CloudRuntimeException("can't find " + name);
          }
          return (T)_gson.fromJson(entry.getValue(), clazz);
      }
  }
  