package org.apache.maven.surefire.common.junit4;
   
   /*
    * 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.junit.runner.notification.RunListener;
  import org.junit.runner.notification.RunNotifier;
  
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.Iterator;
  import java.util.concurrent.atomic.AtomicInteger;
  
  import static org.apache.maven.surefire.util.internal.ConcurrencyUtils.countDownToZero;
  
  /**
   * Extends {@link RunNotifier JUnit notifier},
   * encapsulates several different types of {@link RunListener JUnit listeners}, and
   * fires events to listeners.
   *
   * @author <a href="mailto:tibordigana@apache.org">Tibor Digana (tibor17)</a>
   * @since 2.19
   */
  public class Notifier
      extends RunNotifier implements Stoppable
  {
      private final Collection<RunListener> listeners = new ArrayList<RunListener>();
  
      private final AtomicInteger skipAfterFailureCount;
  
      private final JUnit4RunListener reporter;
  
      public Notifier( JUnit4RunListener reporter, int skipAfterFailureCount )
      {
          addListener( reporter );
          this.reporter = reporter;
          this.skipAfterFailureCount = new AtomicInteger( skipAfterFailureCount );
      }
  
      public void fireStopEvent()
      {
          if ( countDownToZero( skipAfterFailureCount ) )
          {
              pleaseStop();
          }
  
          reporter.testExecutionSkippedByUser();
      }
  
      @Override
      public void addListener( RunListener listener )
      {
          listeners.add( listener );
          super.addListener( listener );
      }
  
      public Notifier addListeners( Collection<RunListener> given )
      {
          for ( RunListener listener : given )
          {
              addListener( listener );
          }
          return this;
      }
  
      public Notifier addListeners( RunListener... given )
      {
          for ( RunListener listener : given )
          {
              addListener( listener );
          }
          return this;
      }
  
      @Override
      public void removeListener( RunListener listener )
      {
          listeners.remove( listener );
          super.removeListener( listener );
      }
  
      public void removeListeners()
      {
         for ( Iterator<RunListener> it = listeners.iterator(); it.hasNext(); )
         {
             RunListener listener = it.next();
             it.remove();
             super.removeListener( listener );
         }
     }
 }