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From "Richard Eckart de Castilho (JIRA)" <...@uima.apache.org>
Subject [jira] [Commented] (UIMA-5115) uv3 select() api for iterators and streams over CAS contents
Date Tue, 20 Sep 2016 19:22:20 GMT

    [ https://issues.apache.org/jira/browse/UIMA-5115?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15507519#comment-15507519
] 

Richard Eckart de Castilho commented on UIMA-5115:
--------------------------------------------------

I think `at(location).single()` is quite a different thing. at (between, covered by, etc.)
is IMHO all referring to a "location constraint" whereas single is a cardinality constraint.
The following variations should all IMHO be possible:

{code}
jcas.select(Token.class).coveredBy(sentence).single()
jcas.select(Token.class).coveredBy(10, 20).singleOrNull()
jcas.select(Token.class).at(10,20).get()
jcas.select(Token.class).between(firstName, lastName).get()
{code}

or abstractly

{noformat}
CONTAINER.select(TYPE-CONSTRAINT).LOCATION-CONSTRAINT(args)[.CARDINALITY-CONSTRAINT()]
{noformat}

> uv3 select() api for iterators and streams over CAS contents
> ------------------------------------------------------------
>
>                 Key: UIMA-5115
>                 URL: https://issues.apache.org/jira/browse/UIMA-5115
>             Project: UIMA
>          Issue Type: New Feature
>          Components: Core Java Framework
>            Reporter: Marshall Schor
>            Priority: Minor
>             Fix For: 3.0.0SDKexp
>
>
> Design and implement a select() API based on uimaFIT's select, integrated well with Java
8 concepts.  Initial discussions in UIMA-1524.  Wiki with diagram: https://cwiki.apache.org/confluence/display/UIMA/UV3+Iterator+support



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