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From "Marshall Schor (JIRA)" <...@uima.apache.org>
Subject [jira] [Commented] (UIMA-5603) uv3 add ability to do extended-for on all FSs of a type in a view
Date Fri, 06 Oct 2017 14:45:01 GMT

    [ https://issues.apache.org/jira/browse/UIMA-5603?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16194677#comment-16194677
] 

Marshall Schor commented on UIMA-5603:
--------------------------------------

The meaning of unordered is that the Framework makes no commitment to the ordering, and ordering
should not be expected.  If the type is a subtype of Annotation, and there is no other sorted
index defined for the type, the order (for the current impl) corresponds to something like
this:
1) there's no interleaving of types and subtypes, like a real iterator would
2) for each type or subtype, it currently is in the sorted order (for the Annotation index)
(but just for that type, not including the subtypes)

Saying it is unordered is meant to discourage users from depending on the order.  And, given
that a pipeline assembler could add an index definition using XML configuration, which the
programmer would not know about, it would be quite unreliable to depend on an order.  If an
order is wanted for a particular type and index, programmers wanting that order must specify
the type and index to get that index, and then can use the extended-for on that index, or
get an interator, from that index, etc.

> uv3 add ability to do extended-for on all FSs of a type in a view
> -----------------------------------------------------------------
>
>                 Key: UIMA-5603
>                 URL: https://issues.apache.org/jira/browse/UIMA-5603
>             Project: UIMA
>          Issue Type: Improvement
>          Components: Core Java Framework
>    Affects Versions: 3.0.0SDK-alpha02
>            Reporter: Marshall Schor
>            Assignee: Marshall Schor
>            Priority: Trivial
>             Fix For: 3.0.0SDK-beta
>
>
> Forms like cas.getIndexRepository().getAllIndexedFSs(...) return an iterator.  It would
be nice to be able to use the returned result in an extended for :   for (TOP x : cas.getInd...
etc).  
> Add a new set of methods, getIndexedFSs( Type or JCas.class or nothing) to CAS/JCas and
FSIndexRepository interfaces, that return Collections, without copying the index arrays, but
just using them.  Make these copy-on-write style, so subsequent updates to the UIMA indexes
won't affect the collection.  These can then be used in extended-for loops.
> Update internal uses of getAllIndexedFS (which does copy the indexes) to use the new
style.



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