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https://issues.apache.org/jira/browse/UIMA-4059?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14207230#comment-14207230
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Marshall Schor commented on UIMA-4059:
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The remove - modify - add sequence is only needed for Set and Sorted (not Bag)
indices - Bag indices have no keys.
> add-to-indexes and checking for incorrect key modifications
> -----------------------------------------------------------
>
> Key: UIMA-4059
> URL: https://issues.apache.org/jira/browse/UIMA-4059
> Project: UIMA
> Issue Type: Improvement
> Components: Core Java Framework
> Affects Versions: 2.6.0SDK
> Reporter: Marshall Schor
> Assignee: Marshall Schor
> Priority: Minor
> Fix For: 2.7.0SDK
>
>
> Address the issue raised in Jiras UIMA-3399 and UIMA-4049, as follows: Add
> (under control of a Java jvm defined param - for backwards compatibility in
> unexpected edge cases, or if it is determined this has too big a
> performance/space cost) a set which tracks if a FS has been
> added/removed-to/from-the-indexes that has fast O(1) access. Change behavior
> of add-to-indexes when a FS has already been added to not add it again.
> Change behavior of feature structure value setting to throw an exception if
> the feature being set is used as a key in any index, and the FS has been
> added-to-the-indexes.
> This should address issues raised in both JIRAs.
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