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;
  
  import static java.lang.System.setErr;
  import static java.lang.System.setOut;
  import static org.apache.maven.surefire.util.internal.StringUtils.NL;
  
  /**
   * Deals with system.out/err.
   * <br>
   */
  public class ConsoleOutputCapture
  {
      public static void startCapture( ConsoleOutputReceiver target )
      {
          setOut( new ForwardingPrintStream( true, target ) );
          setErr( new ForwardingPrintStream( false, target ) );
      }
  
      private 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;
          }
  
          @Override
          public void write( byte[] buf, int off, int len )
          {
              // Note: At this point the supplied "buf" instance is reused, which means
              // data must be copied out of the buffer
              target.writeTestOutput( buf, off, len, isStdout );
          }
  
          @Override
          public void write( byte[] b )
              throws IOException
          {
              target.writeTestOutput( b, 0, b.length, isStdout );
          }
  
          @Override
          public void write( int b )
          {
              byte[] buf = new byte[1];
              buf[0] = (byte) b;
              try
              {
                  write( buf );
              }
              catch ( IOException e )
              {
                  setError();
              }
          }
  
          @Override
          public void println( String s )
          {
              if ( s == null )
              {
                  s = "null"; // Shamelessly taken from super.print
              }
              final byte[] bytes = ( s + NL ).getBytes();
              target.writeTestOutput( bytes, 0, bytes.length, isStdout );
          }
  
          @Override
          public void close()
          {
          }
 
         @Override
         public void flush()
         {
         }
     }
 
 }