the application-specific
 request URI part.
 <p>
 Note that the method is usable only in pre-matching filters, prior to the resource
 matching occurs. Trying to invoke the method in a filter bound to a resource method
 results in an <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/IllegalStateException.html?is-external=true" title="class or interface in java.lang"><code>IllegalStateException</code></a> being thrown.
 </p></div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>