1 package org.apache.maven.surefire.report;
2
3 /*
4 * Licensed to the Apache Software Foundation (ASF) under one
5 * or more contributor license agreements. See the NOTICE file
6 * distributed with this work for additional information
7 * regarding copyright ownership. The ASF licenses this file
8 * to you under the Apache License, Version 2.0 (the
9 * "License"); you may not use this file except in compliance
10 * with the License. You may obtain a copy of the License at
11 *
12 * http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing,
15 * software distributed under the License is distributed on an
16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17 * KIND, either express or implied. See the License for the
18 * specific language governing permissions and limitations
19 * under the License.
20 */
21
22 import java.io.ByteArrayOutputStream;
23 import java.io.IOException;
24 import java.io.PrintStream;
25
26 /**
27 * Deals with system.out/err.
28 * <p/>
29 */
30 public class ConsoleOutputCapture
31 {
32 public static void startCapture( ConsoleOutputReceiver target )
33 {
34 System.setOut( new ForwardingPrintStream( true, target ) );
35
36 System.setErr( new ForwardingPrintStream( false, target ) );
37 }
38
39 private static class ForwardingPrintStream
40 extends PrintStream
41 {
42 private final boolean isStdout;
43
44 private final ConsoleOutputReceiver target;
45
46 ForwardingPrintStream( boolean stdout, ConsoleOutputReceiver target )
47 {
48 super( new ByteArrayOutputStream() );
49 isStdout = stdout;
50 this.target = target;
51 }
52
53 public void write( byte[] buf, int off, int len )
54 {
55 // Note: At this point the supplied "buf" instance is reused, which means
56 // data must be copied out of the buffer
57 target.writeTestOutput( buf, off, len, isStdout );
58 }
59
60 public void write( byte[] b )
61 throws IOException
62 {
63 target.writeTestOutput( b, 0, b.length, isStdout );
64 }
65
66 public void write( int b )
67 {
68 byte[] buf = new byte[1];
69 buf[0] = (byte) b;
70 try
71 {
72 write( buf );
73 }
74 catch ( IOException e )
75 {
76 setError();
77 }
78 }
79
80 public void println( String s )
81 {
82 if ( s == null )
83 {
84 s = "null"; // Shamelessly taken from super.print
85 }
86 final byte[] bytes = ( s + "\n" ).getBytes();
87 target.writeTestOutput( bytes, 0, bytes.length, isStdout );
88 }
89
90 public void close()
91 {
92 }
93
94 public void flush()
95 {
96 }
97 }
98
99 }