Boolean as a Task Flow Input Parameter

When customizing WebCenter Portal Task Flows, you may be required to add new parameters.

This post explains how to solve a problem when the parameter added is java.lang.Boolean type.

What happens when adding an Input Parameter of type Boolean?


Booelan parameter with default scoped variable


When adding a Boolean parameter to a Task Flow it will be shown as Check Box.


Check Box when configuring Boolean parameter with Oracle Composer


However, trying to use this parameter, for example in a Router, will produce following error:

<Jan 10, 2014 11:52:12 AM CET> <Error> <oracle.adf.controller.internal.binding.TaskFlowRegionModelViewPort> <BEA-000000> <
oracle.adf.controller.activity.ActivityLogicException: ADFC-06008: Router case expression '#{}' does not evaluate to a boolean.

Why does this not evaluate to a Boolean?

Looking into the MDS you will find following:


MDS stored values when checking/unchecking


  • ${'true'}
  • ${'false'}

This values are taken by #{} as String.

What is the solution?

The solution is based on create a Managed Bean with a java.lang.Boolean property that will be mapped to the input parameter value.


Managed Bean that will store the parameter value


Parameter mapped to a property of the Manage Bean


Using this method will allow you to Boolean values without conversion problems.