framework/src/ant/apache-ant-1.9.6/manual/Tasks/filter.html


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<title>Filter Task</title>
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<h2><a name="filter">Filter</a></h2>
<h3>Description</h3>
<p>Sets a token filter for this project or read multiple token filter from
an input file and sets these as filters.
Token filters are used by all tasks that perform file copying operations
through the Project commodity methods. See the warning
<a href="../using.html#filters"><em>here</em></a> before using.</p>
<p>Note 1: the token string must not contain the separators chars (@).<br>
Note 2: Either token and value attributes must be provided, or only the
filtersfile attribute.</p>

<h3>Parameters</h3>
<table border="1" cellpadding="2" cellspacing="0">
  <tr>
    <td valign="top"><b>Attribute</b></td>
    <td valign="top"><b>Description</b></td>
    <td align="center" valign="top"><b>Required</b></td>
  </tr>
  <tr>
    <td valign="top">token</td>
    <td valign="top">the token string without @</td>
    <td align="center" valign="top">Yes*</td>
  </tr>
  <tr>
    <td valign="top">value</td>
    <td valign="top">the string that should be put to replace the token when the 
      file is copied</td>
    <td align="center" valign="top">Yes*</td>
  </tr>
  <tr>
    <td valign="top">filtersfile</td>
    <td valign="top">The file from which the filters must be read. This file must be a formatted as a property file. </td>
    <td align="center" valign="top">Yes*</td>
  </tr>
</table>
<p>* see notes 1 and 2 above parameters table.</p>
<h3>Examples</h3>
<pre>  &lt;filter token=&quot;year&quot; value=&quot;2000&quot;/&gt;
  &lt;copy todir=&quot;${dest.dir}&quot; filtering=&quot;true&quot;&gt;
    &lt;fileset dir=&quot;${src.dir}&quot;/&gt;
  &lt;/copy&gt;</pre> 
<p>will copy recursively all the files from the <i>src.dir</i> directory into
the <i>dest.dir</i> directory replacing all the occurrences of the string <i>@year@</i>
with <i>2000.</i></p>
<pre>  &lt;filter filtersfile=&quot;deploy_env.properties&quot;/&gt;</pre>
will read all property entries from the <i>deploy_env.properties</i> file
and set these as filters.


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