Marshall Schor created UIMA-4701:
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Summary: Creating CASs with common CAS Definition should share
type systems
Key: UIMA-4701
URL: https://issues.apache.org/jira/browse/UIMA-4701
Project: UIMA
Issue Type: Improvement
Components: Core Java Framework
Reporter: Marshall Schor
Assignee: Marshall Schor
Priority: Minor
Fix For: 3.0.0SDKexp
Cas Definitions can be captured in the class CasDefinition and passed to the
CasCreationUtils createCas methods. This is done, for instance, when CAS Pools
are created.
The processing currently holds the definitions as description-objects, and
re-parses these into type system implementations, every time a cas is produced.
These multiple type systems are identical, but replicated, which is wasteful.
Change the definition of CasDefinition to permit it to hold the derived
TypeSystemImpl object, and change createCas to use that if available, to share
common TypeSystemImplementations.
Other approaches that result in even more instances of type system sharing
might be considered, but it's possible that different instances may be wanted
in some cases in the future (for example, if we allow dynamic augmentation of
types / features while running).
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