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<html lang="en">
  <head>
    <link rel="stylesheet" type="text/css" href="../stylesheets/style.css">
    <title>Whichresource Task</title>
  </head>

  <body>
    <h2 id="whichresource">Whichresource</h2>
    <h3>Description</h3>
    <p>Find a class or resource on the supplied classpath, or the system classpath if none is
      supplied.  The named property is set if the item can be found.  For example:</p>
    <pre>&lt;whichresource resource="/log4j.properties" property="log4j.url"/&gt;</pre>
    <h3>Parameters</h3>
    <table class="attr">
      <tr>
        <th scope="col">Attribute</th>
        <th scope="col">Description</th>
        <th scope="col">Required</th>
      </tr>
      <tr>
        <td>property</td>
        <td>The property to fill with the URL of the resource of class.</td>
        <td>Yes</td>
      </tr>
      <tr>
        <td>class</td>
        <td>The name of the class to look for.</td>
        <td rowspan="2">Exactly one of these</td>
      </tr>
      <tr>
        <td>resource</td>
        <td class="left">The name of the resource to look for.</td>
      </tr>
      <tr>
        <td>classpath</td>
        <td>The classpath to use when looking up <var>class</var> or <var>resource</var>.</td>
        <td>No</td>
      </tr>
      <tr>
        <td>classpathref</td>
        <td>The classpath to use, given as a <a href="../using.html#references">reference</a> to a
          path defined elsewhere.  <em>Since Apache Ant 1.7.1</em>.</td>
        <td>No</td>
      </tr>
    </table>
    <h3>Parameters specified as nested elements</h3>
    <h4>classpath</h4>
    <p><code>Whichresource</code>'s <var>classpath</var> attribute is
      a <a href="../using.html#path">path-like structure</a> and can also be set via a
      nested <code>&lt;classpath&gt;</code> element.</p>
    <h3>Examples</h3>
    <p>The following shows using a classpath reference.</p>
    <pre>
&lt;path id="bsf.classpath"&gt;
  &lt;fileset dir="${user.home}/lang/bsf" includes="*.jar"/&gt;
&lt;/path&gt;
&lt;whichresource property="bsf.class.location"
               class="org.apache.bsf.BSFManager"
               classpathref="bsf.classpath"/&gt;
&lt;echo&gt;${bsf.class.location}&lt;/echo&gt;</pre>
    <p>The following shows using a nested classpath.</p>
    <pre>
&lt;whichresource property="ant-contrib.antlib.location"
               resource="net/sf/antcontrib/antlib.xml"&gt;
  &lt;classpath&gt;
    &lt;path path="f:/testing/ant-contrib/target/ant-contrib.jar"/&gt;
  &lt;/classpath&gt;
&lt;/whichresource&gt;
&lt;echo&gt;${ant-contrib.antlib.location}&lt;/echo&gt;</pre>
  </body>
</html>