vippk-yy-template/build/apache-ant-1.10.4/manual/Tasks/length.html

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<title>Length Task</title>
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<h2>Length</h2>
<p><em>Since Apache Ant 1.6.3</em></p>
<h3>Description</h3>
<p>Display or set a property containing length information for a string, a file, or one or more
nested <a href="../Types/resources.html#collection">resource collections</a>.  Can also be used as
a <code>condition</code>.</p>
<h3>Parameters</h3>
<table class="attr">
  <tr>
    <th scope="col" rowspan="2">Attribute</th>
    <th scope="col" rowspan="2">Description</th>
    <th scope="col" colspan="2">Required</th>
  </tr>
  <tr>
    <th scope="col">Task</th>
    <th scope="col">Condition</th>
  </tr>
  <tr>
    <td>property</td>
    <td>The property to set.</td>
    <td class="center">No; by default, output value to the log</td>
    <td>Ignored</td>
  </tr>
  <tr>
    <td>mode</td>
    <td>File length mode; when <q>all</q> the resulting value is the sum of all included resources'
      lengths; when <q>each</q> the task outputs the absolute path and length of each included
      resource, one per line.</td>
    <td class="center">No; default is <q>all</q></td>
    <td>Ignored</td>
  </tr>
  <tr>
    <td>file</td>
    <td>Single file whose length to report.</td>
    <td rowspan="3" colspan="2">One of these, or one or more nested filesets</td>
  </tr>
  <tr>
    <td>resource</td>
    <td class="left">Single resource whose length to report (using
      extended <a href="../properties.html#propertyHelper">properties handling</a>).  <em>Since Ant
      1.8.1</em>
    </td>
  </tr>
  <tr>
    <td>string</td>
    <td class="left">The string whose length to report.</td>
  </tr>
  <tr>
    <td>trim</td>
    <td>Whether to trim when operating on a string.</td>
    <td colspan="2">No; default is <q>false</q>, ignored unless <var>string</var> is set</td>
  </tr>
  <tr>
    <td>length</td>
    <td>Comparison length.</td>
    <td class="center">Ignored</td>
    <td>Yes</td>
  </tr>
  <tr>
    <td>when</td>
    <td>Comparison
      type: <q>equal</q>, <q>eq</q>, <q>greater</q>, <q>gt</q>, <q>less</q>, <q>lt</q>, <q>ge</q>
      (greater or equal), <q>ne</q> (not equal), <q>le</q> (less or equal).</td>
    <td class="center">Ignored</td>
    <td>No; default is <q>equal</q></td>
  </tr>
</table>

<h3>Parameters specified as nested elements</h3>

<h4>resource collections</h4>
<p>You can include resources via nested <a href="../Types/resources.html#collection">resource
collection</a>s.</p>

<h3>Examples</h3>

<p>Store the length of the string <q>foo</q> in the property named <code>length.foo</code>.</p>
<pre>&lt;length string=&quot;foo&quot; property=&quot;length.foo&quot;/&gt;</pre>

<p>Store the length of file <samp>bar</samp> in the property named <code>length.bar</code>.</p>
<pre>&lt;length file=&quot;bar&quot; property=&quot;length.bar&quot;/&gt;</pre>

<p>Store the file paths of <samp>foo</samp> and <samp>bar</samp> and their length into the
property <code>length</code>.</p>
<pre>
&lt;length property=&quot;length&quot; mode=&quot;each&quot;&gt;
    &lt;fileset dir=&quot;.&quot; includes=&quot;foo,bar&quot;/&gt;
&lt;/length&gt;
</pre>

<p>Add the length of <samp>foo</samp> and <samp>bar</samp> and store the result in
property <code>length</code>.</p>
<pre>
&lt;length property=&quot;length&quot; mode=&quot;all&quot;&gt;
    &lt;fileset dir=&quot;.&quot; includes=&quot;foo,bar&quot;/&gt;
&lt;/length&gt;
</pre>

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