package org.apache.archiva.repository.features;
   
   /*
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF licenses this file
    * to you 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.
   */
  
  import org.apache.archiva.event.Event;
  import org.apache.archiva.event.EventHandler;
  
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.List;
  
  public class AbstractFeature {
      private List<EventHandler> listener = new ArrayList<>();
  
      AbstractFeature() {
  
      }
  
      AbstractFeature(EventHandler listener) {
          this.listener.add(listener);
      }
  
      AbstractFeature(Collection<EventHandler> listeners) {
          this.listener.addAll(listeners);
      }
  
      public void addListener(EventHandler listener) {
          if (!this.listener.contains(listener)) {
              this.listener.add(listener);
          }
          this.listener.add(listener);
      }
  
      public void removeListener(EventHandler listener) {
          this.listener.remove(listener);
      }
  
      public void clearListeners() {
          this.listener.clear();
      }
  
      public void pushEvent(Event event) {
          for(EventHandler listr : listener) {
              listr.handle(event);
          }
      }
  
  
  }