package org.apache.maven.surefire.report;
   
   /*
    * 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.io.ByteArrayOutputStream;
  import java.io.IOException;
  import java.io.PrintStream;
  
  /**
   * Deals with system.out/err.
   * <p/>
   */
  public class ConsoleOutputCapture
  {
  
      private static final PrintStream oldOut = System.out;
  
      private static final PrintStream oldErr = System.err;
  
      public ConsoleOutputCapture( ConsoleOutputReceiver target )
      {
          System.setOut( new ForwardingPrintStream( true, target ) );
  
          System.setErr( new ForwardingPrintStream( false, target ) );
      }
  
      public void restoreStreams()
      {
          System.setOut( oldOut );
          System.setErr( oldErr );
      }
  
      static class ForwardingPrintStream
          extends PrintStream
      {
          private final boolean isStdout;
  
          private final ConsoleOutputReceiver target;
  
          ForwardingPrintStream( boolean stdout, ConsoleOutputReceiver target )
          {
              super( new ByteArrayOutputStream() );
              isStdout = stdout;
              this.target = target;
          }
  
          public void write( byte[] buf, int off, int len )
          {
              target.writeTestOutput( buf, off, len, isStdout );
          }
  
          public void write( byte[] b )
              throws IOException
          {
              target.writeTestOutput( b, 0, b.length, isStdout );
          }
  
          public void close()
          {
          }
  
          public void flush()
          {
          }
      }
  
  }