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.interceptor;
  
  import com.alibaba.nacos.common.spi.NacosServiceLoader;
  
  import java.util.Comparator;
  import java.util.LinkedList;
  import java.util.List;
  
  /**
   * Abstract Naming Interceptor Chain.
   *
   * @author xiweng.yy
   */
  public abstract class AbstractNamingInterceptorChain<T extends Interceptable>
          implements NacosNamingInterceptorChain<T> {
      
      private final List<NacosNamingInterceptor<T>> interceptors;
      
      protected AbstractNamingInterceptorChain(Class<? extends NacosNamingInterceptor<T>> clazz) {
          this.interceptors = new LinkedList<>();
          interceptors.addAll(NacosServiceLoader.load(clazz));
          interceptors.sort(Comparator.comparingInt(NacosNamingInterceptor::order));
      }
      
      /**
       * Get all interceptors.
       *
       * @return interceptors list
       */
      protected List<NacosNamingInterceptor<T>> getInterceptors() {
          return interceptors;
      }
      
      @Override
      public void addInterceptor(NacosNamingInterceptor<T> interceptor) {
          interceptors.add(interceptor);
          interceptors.sort(Comparator.comparingInt(NacosNamingInterceptor::order));
      }
      
      @Override
      public void doInterceptor(T object) {
          for (NacosNamingInterceptor<T> each : interceptors) {
              if (!each.isInterceptType(object.getClass())) {
                  continue;
              }
              if (each.intercept(object)) {
                  object.afterIntercept();
                  return;
              }
          }
          object.passIntercept();
      }
  }
  