Read the content of an exchange property with dynamically set name

[Gerald Kallas]

Dear all,

I've set an exchange property like

<setProperty name="fileCreateFlag"><jsonpath 
suppressExceptions="true">$.*.etc.fileCreateFlag</jsonpath></setProperty>

This contains finally the name of an other JSON property in the message body.

I want to read the content of this exchange property with dynamically set name 
like

<setProperty 
name="fileCreateFlagContent"><simple>${${exchangeProperty.fileCreateFlag}}</simple></setProperty>

This doubled reference doesn't work. Is there a way to achieve this? Any ideas 
are welcome.

Best
Gerald