package org.apache.maven.surefire.junitcore;
   
   /*
    * 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 java.util.Collection;
  import java.util.concurrent.ConcurrentLinkedQueue;
  
  import org.apache.maven.surefire.report.ConsoleOutputReceiver;
  import org.apache.maven.surefire.util.internal.ByteBuffer;
  
  /**
   * A stream-like object that preserves ordering between stdout/stderr
   */
  public final class LogicalStream
  {
      private final Collection<Entry> output = new ConcurrentLinkedQueue<Entry>();
  
      static final class Entry
      {
          final boolean stdout;
  
          final byte[] b;
  
          final int off;
  
          final int len;
  
          Entry( boolean stdout, byte[] b, int off, int len )
          {
              this.stdout = stdout;
              this.b = ByteBuffer.copy( b, off, len );
              this.off = 0;
              this.len = len;
          }
  
          public void writeDetails( ConsoleOutputReceiver outputReceiver )
          {
              outputReceiver.writeTestOutput( b, off, len, stdout );
          }
  
          @Override
          public String toString()
          {
              return new String( b, off, len );
          }
  
          public boolean isBlankLine()
          {
              return "\n".equals( toString() );
          }
      }
  
      public synchronized void write( boolean stdout, byte b[], int off, int len )
      {
          Entry entry = new Entry( stdout, b, off, len );
          if ( !entry.isBlankLine() )
          {
              output.add( entry );
          }
      }
  
      public synchronized void writeDetails( ConsoleOutputReceiver outputReceiver )
      {
          for ( Entry entry : output )
          {
              entry.writeDetails( outputReceiver );
          }
      }
  }