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.common.http.client;
  
  import com.alibaba.nacos.common.constant.ResponseHandlerType;
  import com.alibaba.nacos.common.http.client.handler.BeanResponseHandler;
  import com.alibaba.nacos.common.http.client.handler.ResponseHandler;
  import com.alibaba.nacos.common.http.client.handler.RestResultResponseHandler;
  import com.alibaba.nacos.common.http.client.handler.StringResponseHandler;
  import com.alibaba.nacos.common.utils.JacksonUtils;
  import com.fasterxml.jackson.databind.JavaType;
  import org.slf4j.Logger;
  
  import java.lang.reflect.Type;
  import java.util.HashMap;
  import java.util.Map;
  
  /**
   * For NacosRestTemplate and NacosAsyncRestTemplate, provide initialization and register of response converter.
   *
   * @author mai.jh
   */
  @SuppressWarnings("all")
  public abstract class AbstractNacosRestTemplate {
      
      private final Map<String, ResponseHandler> responseHandlerMap = new HashMap<String, ResponseHandler>();
      
      protected final Logger logger;
      
      public AbstractNacosRestTemplate(Logger logger) {
          this.logger = logger;
          initDefaultResponseHandler();
      }
      
      private void initDefaultResponseHandler() {
          // init response handler
          responseHandlerMap.put(ResponseHandlerType.STRING_TYPE, new StringResponseHandler());
          responseHandlerMap.put(ResponseHandlerType.RESTRESULT_TYPE, new RestResultResponseHandler());
          responseHandlerMap.put(ResponseHandlerType.DEFAULT_BEAN_TYPE, new BeanResponseHandler());
      }
      
      /**
       * register customization Response Handler.
       *
       * @param responseHandler {@link ResponseHandler}
       */
      public void registerResponseHandler(String responseHandlerType, ResponseHandler responseHandler) {
          responseHandlerMap.put(responseHandlerType, responseHandler);
      }
      
      /**
       * Select a response handler by responseType.
       *
       * @param responseType responseType
       * @return ResponseHandler
       */
      protected ResponseHandler selectResponseHandler(Type responseType) {
          ResponseHandler responseHandler = null;
          if (responseType == null) {
              responseHandler = responseHandlerMap.get(ResponseHandlerType.STRING_TYPE);
          }
          if (responseHandler == null) {
              JavaType javaType = JacksonUtils.constructJavaType(responseType);
              String name = javaType.getRawClass().getName();
              responseHandler = responseHandlerMap.get(name);
          }
          // When the corresponding type of response handler cannot be obtained,
          // the default bean response handler is used
          if (responseHandler == null) {
              responseHandler = responseHandlerMap.get(ResponseHandlerType.DEFAULT_BEAN_TYPE);
          }
          responseHandler.setResponseType(responseType);
          return responseHandler;
      }
  }
  