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From "Richard Eckart de Castilho (JIRA)" <...@uima.apache.org>
Subject [jira] [Commented] (UIMA-3234) Differentiate no Annotation and multiple Annotation case in CasUtil.selectSingle(CAS cas, Type type)
Date Sat, 17 Sep 2016 08:10:20 GMT

    [ https://issues.apache.org/jira/browse/UIMA-3234?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15498533#comment-15498533
] 

Richard Eckart de Castilho commented on UIMA-3234:
--------------------------------------------------

I am considering to not cover this in uimaFIT and instead resolve it as part of UIMA-1524
(new iteration API in UIMA core).

> Differentiate no Annotation and multiple Annotation case in CasUtil.selectSingle(CAS
cas, Type type)
> ----------------------------------------------------------------------------------------------------
>
>                 Key: UIMA-3234
>                 URL: https://issues.apache.org/jira/browse/UIMA-3234
>             Project: UIMA
>          Issue Type: Wish
>          Components: uimaFIT
>    Affects Versions: 2.0.0uimaFIT
>            Reporter: Artem
>            Priority: Trivial
>             Fix For: 2.3.0uimaFIT
>
>   Original Estimate: 1h
>  Remaining Estimate: 1h
>
> Currently there is one exception type in CasUtil.selectSingle(CAS cas, Type type) method
for the case if CAS does not contain an Annotation or CAS contains more than one Annotation.
However, I sometimes need to differentiate between these two cases in exception handling.
A new method like, selectSingleOrNull(...) could solve this problem: return null if no Annotation,
RuntimeException if multiple Annotations.
> Currently to handle this problem I just use CasUtil.select(...) and check for the size
of the returned collection.



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