content: /*
   * Copyright 1999-2018 Alibaba Group Holding Ltd.
   *
   * 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.alibaba.nacos.naming.healthcheck;
  
  import com.alibaba.fastjson.JSON;
  import com.alibaba.fastjson.JSONObject;
  import com.alibaba.fastjson.parser.DefaultJSONParser;
  import com.alibaba.fastjson.parser.deserializer.ObjectDeserializer;
  import com.alibaba.fastjson.serializer.JSONSerializer;
  import com.alibaba.fastjson.serializer.ObjectSerializer;
  import com.alibaba.fastjson.serializer.SerializeWriter;
  import com.alibaba.nacos.api.naming.pojo.AbstractHealthChecker;
  
  import java.io.IOException;
  import java.lang.reflect.Type;
  
  /**
   * @author nkorange
   */
  public class JsonAdapter implements ObjectDeserializer, ObjectSerializer {
  
      private static JsonAdapter INSTANCE = new JsonAdapter();
  
      private JsonAdapter() {
      }
  
      public static JsonAdapter getInstance() {
          return INSTANCE;
      }
  
      @SuppressWarnings("unchecked")
      @Override
      public <T> T deserialze(DefaultJSONParser parser, Type type, Object fieldName) {
          JSONObject jsonObj = (JSONObject) parser.parse();
          String checkType = jsonObj.getString("type");
  
          Class target = HealthCheckType.ofHealthCheckerClass(checkType);
  
          if(target != null){
              return (T) JSON.parseObject(jsonObj.toJSONString(), target);
          }
  
          return null;
      }
  
      @Override
      public int getFastMatchToken() {
          return 0;
      }
  
      @Override
      public void write(JSONSerializer jsonSerializer, Object o, Object o1, Type type, int i) throws IOException {
          SerializeWriter writer = jsonSerializer.getWriter();
          if (o == null) {
              writer.writeNull();
              return;
          }
  
          AbstractHealthChecker config = (AbstractHealthChecker) o;
  
          writer.writeFieldValue(',', "type", config.getType());
  
          config.jsonAdapterCallback(writer);
      }
  }
  