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<link rel="stylesheet" type="text/css" href="../stylesheets/style.css">
<title>PropertySet Type</title>
</head>

<body>

<h2 id="propertyset">PropertySet</h2>
<p><em>Since Apache Ant 1.6</em></p>

<p>Groups a set of properties to be used by reference in a task that supports this.</p>

<table class="attr">
  <tr>
    <th scope="col">Attribute</th>
    <th scope="col">Description</th>
    <th scope="col">Required</th>
  </tr>
  <tr>
    <td>dynamic</td>
    <td>Whether to reevaluate the set every time the set is used.</td>
    <td>No; default is <q>true</q></td>
  </tr>
  <tr>
    <td>negate</td>
    <td>Whether to negate results. If <q>true</q>, all properties <em>not</em> selected by
      nested elements will be returned. <em>Since Ant 1.6.2</em>
    </td>
    <td>No; default is <q>false</q></td>
  </tr>
</table>
<h3>Parameters specified as nested elements</h3>

<h4>propertyref</h4>

<p>Selects properties from the current project to be included in the set.</p>

<table class="attr">
  <tr>
    <th scope="col">Attribute</th>
    <th scope="col">Description</th>
    <th scope="col">Required</th>
  </tr>
  <tr>
    <td>name</td>
    <td>Select the property with the given name.</td>
    <td rowspan="4">Exactly one of these</td>
  </tr>
  <tr>
    <td>prefix</td>
    <td class="left">Select the properties whose name starts with the given string.</td>
  </tr>
  <tr>
    <td>regex</td>
    <td class="left">Select the properties that match the given regular expression.  Similar
      to <a href="mapper.html#regexp-mapper">regexp type mappers</a>, this requires a supported
      regular expression library.</td>
  </tr>
  <tr>
    <td>builtin</td>
    <td class="left">Selects a builtin set of properties.  Valid values for this attribute
      are <q>all</q> for all Ant properties, <q>system</q> for the system properties and
      <q>commandline</q> for all properties specified on the
      command line when invoking Ant (plus a number of special
      internal Ant properties).</td>
  </tr>
</table>

<h4>propertyset</h4>

<p>A <code>propertyset</code> can be used as the set union of
more <code>propertyset</code>s.</p>

<p>For example:</p>

<pre>
&lt;propertyset id=&quot;properties-starting-with-foo&quot;&gt;
  &lt;propertyref prefix=&quot;foo&quot;/&gt;
&lt;/propertyset&gt;
&lt;propertyset id=&quot;properties-starting-with-bar&quot;&gt;
  &lt;propertyref prefix=&quot;bar&quot;/&gt;
&lt;/propertyset&gt;
&lt;propertyset id=&quot;my-set&quot;&gt;
  &lt;propertyset refid=&quot;properties-starting-with-foo&quot;/&gt;
  &lt;propertyset refid=&quot;properties-starting-with-bar&quot;/&gt;
&lt;/propertyset&gt;
</pre>

<p>collects all properties whose name starts with either <q>foo</q> or <q>bar</q> in the set
named <q>my-set</q>.</p>

<h4>mapper</h4>

<p>A <a href="mapper.html">mapper</a>&mdash;at maximum one mapper can be specified.  The mapper
is used to change the names of the property keys, for example:

<pre>
&lt;propertyset id=&quot;properties-starting-with-foo&quot;&gt;
  &lt;propertyref prefix=&quot;foo&quot;/&gt;
  &lt;mapper type=&quot;glob&quot; from=&quot;foo*&quot; to=&quot;bar*&quot;/&gt;
&lt;/propertyset&gt;
</pre>

<p>collects all properties whose name starts with <q>foo</q>, but changes the names to start
with <q>bar</q> instead.</p>

<p>If supplied, the nested mapper will be applied subsequent to any negation of matched
properties.</p>

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