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.network.nicira;
  
  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;
  
  public class NatRuleAdapter implements JsonDeserializer<NatRule> {
  
      @Override
      public NatRule deserialize(final JsonElement jsonElement, final Type type, final JsonDeserializationContext context) throws JsonParseException {
          final JsonObject jsonObject = jsonElement.getAsJsonObject();
  
          if (!jsonObject.has("type")) {
              throw new JsonParseException("Deserializing as a NatRule, but no type present in the json object");
          }
  
          final String natRuleType = jsonObject.get("type").getAsString();
          if ("SourceNatRule".equals(natRuleType)) {
              return context.deserialize(jsonElement, SourceNatRule.class);
          } else if ("DestinationNatRule".equals(natRuleType)) {
              return context.deserialize(jsonElement, DestinationNatRule.class);
          }
  
          throw new JsonParseException("Failed to deserialize type \"" + natRuleType + "\"");
      }
  }
  