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()

         {

         }

     }

 }