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From "Marshall Schor (JIRA)" <...@uima.apache.org>
Subject [jira] [Commented] (UIMA-1524) JFSIndexRepository should be enhanced with new generic methods
Date Mon, 12 Sep 2016 18:07:21 GMT

    [ https://issues.apache.org/jira/browse/UIMA-1524?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15484827#comment-15484827
] 

Marshall Schor commented on UIMA-1524:
--------------------------------------

We could overlay the additional capabilities of Annotation Indexes on the stream APIs, via
a few extra methods, something like this:

{code}
int filteredTextSum = index.stream()  //create a stream from an index
       .reverse()    
       .boundedBy(boundingAnnotation) // like subiterator
       .boundsRespectTypePriorities(true) // default is false
       .strict(true)  // default is false; same as nonOverlappingFSs(true)
       .mapToInt(f -> f.getEnd() - f.getBegin()) // get the length of the covered text
       .sum(); // add all of these</code>
{code}

Things like reverse() and boundedBy() are not normal stream operators, of course. 

> JFSIndexRepository should be enhanced with new generic methods
> --------------------------------------------------------------
>
>                 Key: UIMA-1524
>                 URL: https://issues.apache.org/jira/browse/UIMA-1524
>             Project: UIMA
>          Issue Type: Improvement
>          Components: Core Java Framework
>    Affects Versions: 2.3
>            Reporter: Joern Kottmann
>
> Existing methods should be overloaded with an additional Class argument to specify the
exact return type. This changes make down casting of returned objects unnecessary. 



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