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| 3 | <head>
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| 4 | <meta http-equiv="Content-Language" content="en-us">
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| 5 | <title>Redirector Type</title>
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| 6 | </head>
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| 7 |
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| 8 | <body>
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| 9 |
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| 10 | <h2><a name="redirector">I/O redirection</a></h2>
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| 11 | <p>For many tasks, input and output can be defined in a fairly
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| 12 | straightforward fashion. The <a href="../CoreTasks/exec.html">exec</a>
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| 13 | task, used to execute an external process, stands as a very
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| 14 | basic example. The executed process may accept input, produce
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| 15 | output, or do either or both depending upon various circumstances.
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| 16 | Output may be classified as "output" or as "error
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| 17 | output." The <redirector> type provides a concrete means
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| 18 | of redirecting input and output featuring the use of
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| 19 | <a href="./mapper.html">File Mapper</a>s to specify
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| 20 | source (input) and destination (output/error) files. <em>Since Ant 1.6.2</em>
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| 21 | <p>The <code><redirector></code> element accepts the following attributes:</p>
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| 22 | <table border="1" cellpadding="2" cellspacing="0">
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| 23 | <tr>
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| 24 | <td valign="top"><b>Attribute</b></td>
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| 25 | <td valign="top"><b>Description</b></td>
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| 26 | <td align="center" valign="top"><b>Required</b></td>
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| 27 | </tr>
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| 28 | <tr>
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| 29 | <td valign="top">output</td>
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| 30 | <td valign="top">Name of a file to which to write the output. If the error stream
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| 31 | is not also redirected to a file or property, it will appear in this output.</td>
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| 32 | <td align="center" valign="top">No</td>
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| 33 | </tr>
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| 34 | <tr>
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| 35 | <td valign="top">error</td>
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| 36 | <td valign="top">The file to which the standard error of the
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| 37 | command should be redirected.</td>
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| 38 | <td align="center" valign="top">No</td>
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| 39 | </tr>
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| 40 | <tr>
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| 41 | <td valign="top">logError</td>
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| 42 | <td valign="top">This attribute is used when you wish to see error output in Ant's
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| 43 | log and you are redirecting output to a file/property. The error
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| 44 | output will not be included in the output file/property. If you
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| 45 | redirect error with the <i>error</i> or <i>errorProperty</i>
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| 46 | attributes, this will have no effect.</td>
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| 47 | <td align="center" valign="top">No</td>
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| 48 | </tr>
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| 49 | <tr>
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| 50 | <td valign="top">append</td>
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| 51 | <td valign="top">Whether output and error files should be appended to or overwritten.
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| 52 | Defaults to <code>false</code>.</td>
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| 53 | <td align="center" valign="top">No</td>
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| 54 | </tr>
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| 55 | <tr>
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| 56 | <td valign="top">createemptyfiles</td>
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| 57 | <td valign="top">Whether output and error files should be created even when empty.
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| 58 | Defaults to <code>true</code>.</td>
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| 59 | <td align="center" valign="top">No</td>
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| 60 | </tr>
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| 61 | <tr>
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| 62 | <td valign="top">outputproperty</td>
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| 63 | <td valign="top">The name of a property in which the output of the
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| 64 | command should be stored. Unless the error stream is redirected to a separate
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| 65 | file or stream, this property will include the error output.</td>
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| 66 | <td align="center" valign="top">No</td>
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| 67 | </tr>
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| 68 | <tr>
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| 69 | <td valign="top">errorproperty</td>
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| 70 | <td valign="top">The name of a property in which the standard error of the
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| 71 | command should be stored.</td>
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| 72 | <td align="center" valign="top">No</td>
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| 73 | </tr>
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| 74 | <tr>
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| 75 | <td valign="top">input</td>
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| 76 | <td valign="top">A file from which the executed command's standard input
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| 77 | is taken. This attribute is mutually exclusive with the
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| 78 | <i>inputstring</i> attribute.</td>
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| 79 | <td align="center" valign="top">No</td>
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| 80 | </tr>
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| 81 | <tr>
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| 82 | <td valign="top">inputstring</td>
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| 83 | <td valign="top">A string which serves as the input stream for the
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| 84 | executed command. This attribute is mutually exclusive with the
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| 85 | <i>input</i> attribute.</td>
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| 86 | <td align="center" valign="top">No</td>
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| 87 | </tr>
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| 88 | <tr>
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| 89 | <td valign="top">inputencoding</td>
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| 90 | <td valign="top">The input encoding.</td>
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| 91 | <td align="center" valign="top">No</td>
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| 92 | </tr>
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| 93 | <tr>
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| 94 | <td valign="top">outputencoding</td>
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| 95 | <td valign="top">The output encoding.</td>
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| 96 | <td align="center" valign="top">No</td>
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| 97 | </tr>
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| 98 | <tr>
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| 99 | <td valign="top">errorencoding</td>
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| 100 | <td valign="top">The error encoding.</td>
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| 101 | <td align="center" valign="top">No</td>
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| 102 | </tr>
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| 103 | </table>
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| 104 | <h3>Parameters specified as nested elements</h3>
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| 105 | <h4>inputmapper</h4>
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| 106 | <p>A single <a href="./mapper.html">File Mapper</a> used to redirect process
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| 107 | input. Multiple mapping results should concatenate all mapped files as input.
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| 108 | Mapping will ordinarily be performed on a task-specified sourcefile;
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| 109 | consult the documentation of the individual task for more details.
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| 110 | A nested <inputmapper> is not compatible with either of the
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| 111 | <i>input</i> or <i>inputstring</i> attributes.</p>
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| 112 | <h4>outputmapper</h4>
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| 113 | <p>A single <a href="./mapper.html">File Mapper</a> used to redirect process
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| 114 | output. Mapping will ordinarily be performed on a task-specified sourcefile;
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| 115 | consult the documentation of the individual task for more details.
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| 116 | A nested <outputmapper> is not compatible with the
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| 117 | <i>output</i> attribute.</p>
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| 118 | <h4>errormapper</h4>
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| 119 | <p>A single <a href="./mapper.html">File Mapper</a> used to redirect error
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| 120 | output. Mapping will ordinarily be performed on a task-specified sourcefile;
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| 121 | consult the documentation of the individual task for more details.
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| 122 | A nested <errormapper> is not compatible with the
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| 123 | <i>error</i> attribute.</p>
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| 124 | <h4>inputfilterchain</h4>
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| 125 | <p>One or more <a href="./filterchain.html">FilterChain</a>s can be
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| 126 | applied to the process input.</p>
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| 127 | <h4>outputfilterchain</h4>
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| 128 | <p>One or more <a href="./filterchain.html">FilterChain</a>s can be
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| 129 | applied to the process output.</p>
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| 130 | <h4>errorfilterchain</h4>
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| 131 | <p>One or more <a href="./filterchain.html">FilterChain</a>s can be
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| 132 | applied to the error output.</p>
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| 133 | <h3>Usage</h3>
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| 134 | Tasks known to support I/O redirection:
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| 135 | <ul>
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| 136 | <li><a href="../CoreTasks/exec.html">Exec</a></li>
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| 137 | <li><a href="../CoreTasks/apply.html">Apply</a></li>
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| 138 | <li><a href="../CoreTasks/java.html">Java</a></li>
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| 139 | </ul>
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| 140 | <p>The expected behavior of a <redirector> is to a great degree
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| 141 | dependent on the supporting task. Any possible points of confusion
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| 142 | should be noted at the task level.</p>
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| 143 | <hr />
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| 144 | <p align="center">Copyright © 2004 The Apache Software Foundation. All rights
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| 145 | Reserved.</p>
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| 146 |
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| 147 | </body>
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| 148 | </html>
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| 149 |
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