Marshall Schor created UIMA-4669:
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Summary: UV3 Internal - change some APIs to return more specific
subclass
Key: UIMA-4669
URL: https://issues.apache.org/jira/browse/UIMA-4669
Project: UIMA
Issue Type: Improvement
Reporter: Marshall Schor
Priority: Minor
A method which always returns an instance of class C can be specified in the
API to return an instance of C or any of its superclasses. Change the return
type to be C instead of one of the superclasses, because
- the user who is expecting the supertype will still work and cost nothing (a
"Widening Reference Conversion")
- users who need the subtype would otherwise need to cast back to the subtype
- which is a runtime check (unless the JIT can optimize this away).
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