<div>
  <p>The regular expression has to be in the
  <a href="http://download.oracle.com/docs/cd/E17476_01/javase/1.5.0/docs/api/java/util/regex/Pattern.html">Java Pattern format</a>.
  You should introduce capturing groups at least for the file name, the line number and the warning message.
  These groups can then be referenced by the Groovy script.

  </p>

 <h4> Example </h4>

 <p>
 	Here is an example that you can use as a starting point for your regular expression: <tt>^\s*(.*):(\d+):(.*):\s*(.*)$</tt>