[jira] [Created] (UIMA-4720) UV3 Reuse existing type system if equal at commit time

["Marshall Schor (JIRA)" <de...@uima.apache.org>]

Marshall Schor created UIMA-4720:
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             Summary: UV3 Reuse existing type system if equal at commit time
                 Key: UIMA-4720
                 URL: https://issues.apache.org/jira/browse/UIMA-4720
             Project: UIMA
          Issue Type: Sub-task
          Components: Core Java Framework
            Reporter: Marshall Schor
            Assignee: Marshall Schor
             Fix For: 3.0.0SDKexp


When committing a type system, it is possible (and in some use cases, frequently) that the type system is "equal" to an already-in-use committed type system.  In this case, arrange to reuse the existing type system. 
Use a weak-ref map to keep track of available type systems.  Include an appropriate hashcode and equals for committed type systems that cache the hashcode to avoid expensive computation.



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