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<title>PropertyHelper Task</title>
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<h2>PropertyHelper</h2>
<h3>Description</h3>
<p>This task is provided for the purpose of allowing the user to
<b>(a)</b> install a different PropertyHelper at runtime, or
<b>(b)</b> (hopefully more often) install one or more PropertyHelper Delegates into the
PropertyHelper active on the current Project. This is somewhat advanced Ant usage and
assumes a working familiarity with the modern Ant APIs. See the description of Ant's
<a href="../using.html#propertyhelper">Property Helper</a> for more information.
<b>Since Ant 1.8</b></p>

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

<h4>PropertyHelper</h4>
You may specify exactly one configured <code>org.apache.tools.ant.PropertyHelper</code> instance.

<h4>PropertyHelper.Delegate</h4>
You may specify, either in conjunction with a new <code>PropertyHelper</code> or not, one or
more configured implementations of the <code>org.apache.tools.ant.PropertyHelper.Delegate</code>
interface. A deeper understanding of the API is required here, however, as <code>Delegate</code>
is a marker interface only: the nested arguments must implement a <code>Delegate</code>
subinterface in order to do anything meaningful.

<h4>delegate</h4>
A generic &lt;delegate&gt; element is also provided:

<h5>Parameters</h5>
<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">refid</td>
    <td valign="top">The <i>id</i> of a <code>PropertyHelper.Delegate</code> to install.</td>
    <td valign="top" align="center">Yes</td>
  </tr>
</table>

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