Github user Tomschi commented on the issue:
https://github.com/apache/commons-lang/pull/231
> If there is no database entry, return a Process instance with enums which
indicate "Unknown".
(Attribute enums would need an extra 'Unknown' entry).
I think it is better to return null, if the Processor doesn't exists. I
added UNKNOWN to both enums, but UNKNOWN can also be used for a existing
Processor. So it is hard to evaluate, if the Processor exists or not, when the
properties UNKNOWN are used.
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