content: /*
   * Copyright 1999-2023 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.client.naming.listener;
  
  import com.alibaba.nacos.api.naming.listener.NamingEvent;
  import com.alibaba.nacos.api.naming.pojo.Instance;
  import com.alibaba.nacos.client.naming.event.InstancesDiff;
  
  import java.util.List;
  
  /**
   * Naming Event with instance change information.
   *
   * @author lideyou
   */
  public class NamingChangeEvent extends NamingEvent {
      
      private final InstancesDiff instancesDiff;
      
      public NamingChangeEvent(String serviceName, List<Instance> instances, InstancesDiff instancesDiff) {
          super(serviceName, instances);
          this.instancesDiff = instancesDiff;
      }
      
      public NamingChangeEvent(String serviceName, String groupName, String clusters, List<Instance> instances,
              InstancesDiff instancesDiff) {
          super(serviceName, groupName, clusters, instances);
          this.instancesDiff = instancesDiff;
      }
      
      public boolean isAdded() {
          return this.instancesDiff.isAdded();
      }
      
      public boolean isRemoved() {
          return this.instancesDiff.isRemoved();
      }
      
      public boolean isModified() {
          return this.instancesDiff.isModified();
      }
      
      public List<Instance> getAddedInstances() {
          return this.instancesDiff.getAddedInstances();
      }
      
      public List<Instance> getRemovedInstances() {
          return this.instancesDiff.getRemovedInstances();
      }
      
      public List<Instance> getModifiedInstances() {
          return this.instancesDiff.getModifiedInstances();
      }
  }
  