CPM doesnt validate registered CallbackListener references
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Key: UIMA-1727
URL: https://issues.apache.org/jira/browse/UIMA-1727
Project: UIMA
Issue Type: Bug
Components: Collection Processing
Reporter: Jerry Cwiklik
Assignee: Jerry Cwiklik
The CPM uses a list of registered listeners to notify an application of certain
events. The application registers listeners with the CPM before it starts the
run. Apparently, the CPM doesnt validate a listener reference provided by the
application and blindly adds it a list. If the reference is null, the NPE is
thrown when trying to send notifications. Fix the code to validate listener
reference to prevent adding null references.
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