According to [JBPM-769] the way to use ones own identity implementation for task assignment is to specify a handler class.

The example given is...

<task name="create jira task">
 <assignment handler="com.owens.OwensAssignment">
 <expression>this.expressiontext-->is[injected].in.the.expression.field=>of-the<--assignment[handler].class</expression>
 </assignment>
</task>

However it appears that it is not possible to specify the expression via the Process Designer, it can only be entered directly into the XML.

So, is there something I'm missing, or should a feature request be created to permit the inclusion of an expression when using a custom handler?

Thanks in advance
Steve