Compound Key Attribute Causes DataCreationException: JBO-25009 in JDev 11.1.2 (Doc ID 1362985.1)

Symptoms

In JDeveloper 11.1.2.0.0, your ADF Business Components Model includes a View Object with multiple Key attributes of different types, eg Integer and String.
Your ADF BC Model project was created with the "Data Type Map" = "Java Extended for Oracle".

When you run your application and create a new record for that View Object, you get the following error/stack trace:

You have this problem when you create this application from scratch in JDeveloper 11.1.2.0.0.
The same application created in JDeveloper 11g release 1 (eg 11.1.1.5.0), is working without any error.
Also, this application migrated to JDeveloper 11g Release 2 still works correctly.

Cause

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