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.api.naming.pojo.healthcheck;
  
  import com.alibaba.nacos.api.exception.runtime.NacosDeserializationException;
  import com.alibaba.nacos.api.exception.runtime.NacosSerializationException;
  import com.alibaba.nacos.api.naming.pojo.healthcheck.AbstractHealthChecker.None;
  import com.fasterxml.jackson.core.JsonProcessingException;
  import com.fasterxml.jackson.databind.DeserializationFeature;
  import com.fasterxml.jackson.databind.ObjectMapper;
  import com.fasterxml.jackson.databind.jsontype.NamedType;
  
  import java.io.IOException;
  
  /**
   * health checker factory.
   *
   * @author yangyi
   */
  public class HealthCheckerFactory {
      
      private static final ObjectMapper MAPPER = new ObjectMapper();
      
      static {
          MAPPER.disable(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES);
      }
      
      /**
       * Register new sub type of health checker to factory for serialize and deserialize.
       *
       * @param extendHealthChecker extend health checker
       */
      public static void registerSubType(AbstractHealthChecker extendHealthChecker) {
          registerSubType(extendHealthChecker.getClass(), extendHealthChecker.getType());
      }
      
      /**
       * Register new sub type of health checker to factory for serialize and deserialize.
       *
       * @param extendHealthCheckerClass extend health checker
       * @param typeName                 typeName of health checker
       */
      public static void registerSubType(Class<? extends AbstractHealthChecker> extendHealthCheckerClass,
              String typeName) {
          MAPPER.registerSubtypes(new NamedType(extendHealthCheckerClass, typeName));
      }
      
      /**
       * Create default {@link None} health checker.
       *
       * @return new none health checker
       */
      public static None createNoneHealthChecker() {
          return new None();
      }
      
      /**
       * Deserialize and create an instance of health checker.
       *
       * @param jsonString json string of health checker
       * @return new instance
       */
      public static AbstractHealthChecker deserialize(String jsonString) {
          try {
              return MAPPER.readValue(jsonString, AbstractHealthChecker.class);
          } catch (IOException e) {
              throw new NacosDeserializationException(AbstractHealthChecker.class, e);
          }
      }
      
      /**
       * Serialize an instance of health checker to json.
       *
       * @param healthChecker health checker instance
       * @return son string after serializing
       */
      public static String serialize(AbstractHealthChecker healthChecker) {
          try {
              return MAPPER.writeValueAsString(healthChecker);
          } catch (JsonProcessingException e) {
              throw new NacosSerializationException(healthChecker.getClass(), e);
          }
      }
  }
  