- Login as admin to console
- Define a connector and a resource (say resource-ldap on embedded mode).
- Create a USER mapping and map, for example, a Date attribute (say loginDate) with a string value on the resource (say street on ldap, does not matter the meaning)
- Define a JEXL transformer for that mapping row like this
Or a Java/Groovy transformer with this beforePropagation:
You will notice that the value propagated is not the one changed by the transformer, sometimes (like this case) you'll get an NPE: