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From "Richard Eckart de Castilho (JIRA)" <...@uima.apache.org>
Subject [jira] [Commented] (UIMA-5601) uv3: CasCopier problems with custom subclasses of DocumentAnnotation
Date Tue, 03 Oct 2017 20:36:00 GMT

    [ https://issues.apache.org/jira/browse/UIMA-5601?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16190302#comment-16190302

Richard Eckart de Castilho commented on UIMA-5601:

I think UIMA should continue to behave as it does not: create an instance of whatever DocumentAnnotation
is in this special JAR file. If that annotation is deleted by client code and another instance
of DocumentAnnotation or of a subclass of DocumentAnnotation is added to the CAS, that should
be returned by getDocumentAnnotation(). 

If might be a good idea to thrown an exception if a second instance of a DocumentAnnotation
(or subclass) is added.

* The CASCopier should not create a new DocumentAnnotation if the target CAS already contains
* If it does not contain one, it should create a default one.
* If the CASCopier is used to copy the annotation returned from getDocumentAnnotation() in
the source CAS to the target CAS, then a potentially previously created default instance of
DocumentAnnotation in the target CAS should be replaced with the copied instance.

> uv3: CasCopier problems with custom subclasses of DocumentAnnotation
> --------------------------------------------------------------------
>                 Key: UIMA-5601
>                 URL: https://issues.apache.org/jira/browse/UIMA-5601
>             Project: UIMA
>          Issue Type: Bug
>          Components: Core Java Framework
>    Affects Versions: 3.0.0SDK-beta
>            Reporter: Richard Eckart de Castilho
> It seems as if there may be a bug in the way that CasCopier handles the documen annotation.

> Specifically, it seems as if the CasCopier incorrectly handles the case where the target
CAS already contains a document annotation. In my case, I do:
> * create the target CAS
> * add a document annotation (DocumentMetaData extends DocumentAnnotation) to the target
> * create the CasCopier with the source and target CAS
> * copy several FSes but *not* the document annotation
> Expected:
> * target CAS contains 1 DocumentMetaData annotation
> Actual
> * target CAS contains 2 DocumentMetaData annotation
> Also, it seems that `isDocumentAnnotation` may not able to handle it if a CAS uses a
custom subclass of DocumentAnnotation:
> {noformat}
>   private <T extends FeatureStructure> boolean isDocumentAnnotation(T aFS) {
>     if (((TOP)aFS)._getTypeCode() != TypeSystemConstants.docTypeCode) {
>       return false;
>     }
>     if (srcCasDocumentAnnotation == null) {
>       srcCasDocumentAnnotation = srcCasViewImpl.getDocumentAnnotationNoCreate(); 
>     }
>     return aFS == srcCasDocumentAnnotation;
>   }
> {noformat}

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