How to set group expression dynamically.

[gzsoham]

A typical group expresssion looks like this -  <groupExpression><![CDATA[$F{lpName}]]></groupExpression>, where lpName is the name of a field. Instead of using the name of the field directly, I want to pass the field name dynamically using parameter, something like this - <groupExpression><![CDATA[$F{P${xyz}}]]></groupExpression> where xyz is a parameter and its value is 'lpName'. But this is not working. How can I achieve this?

Thanks,

Soham

[gzsoham]

Use condition ? val1 : val2