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From "Richard Eckart de Castilho (JIRA)" <...@uima.apache.org>
Subject [jira] [Commented] (UIMA-5554) Strange exception when trying to get JCas FS class through reflection
Date Thu, 14 Sep 2017 18:25:00 GMT

    [ https://issues.apache.org/jira/browse/UIMA-5554?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16166776#comment-16166776
] 

Richard Eckart de Castilho commented on UIMA-5554:
--------------------------------------------------

Also, I find it a bit counter-intuitive that I cannot make use of the JCas classes in the
`initialize()` method. The below triggers the error:

{noformat}
    @Override
    public void initialize(UimaContext aContext)
        throws ResourceInitializationException
    {
        super.initialize(aContext);
        
        mappings.put("h1", Heading.type);
        mappings.put("h2", Heading.type);
        mappings.put("h3", Heading.type);
        mappings.put("h4", Heading.type);
        mappings.put("h5", Heading.type);
        mappings.put("h6", Heading.type);
        mappings.put("p", Paragraph.type);
    }
{noformat}


> Strange exception when trying to get JCas FS class through reflection
> ---------------------------------------------------------------------
>
>                 Key: UIMA-5554
>                 URL: https://issues.apache.org/jira/browse/UIMA-5554
>             Project: UIMA
>          Issue Type: Bug
>          Components: Core Java Framework
>    Affects Versions: 3.0.0SDK-beta
>            Reporter: Richard Eckart de Castilho
>             Fix For: 3.0.0SDK-beta
>
>
> I am trying to get a class object for a JCas FS type using reflection:
> {noformat}
> Class.forName(typeName);
> {noformat}
> However, it produces this strange error.
> {noformat}
> java.lang.ExceptionInInitializerError
> 	at java.lang.Class.forName0(Native Method)
> 	at java.lang.Class.forName(Class.java:264)
> ...
> Caused by: org.apache.uima.cas.CASRuntimeException: A JCas class field "sofa" is being
initialized by non-framework (user) code before Type System Commit for a type system with
a corresponding type. Either change the user load code to not do initialize, or to defer it
until after the type system commit.
> 	at org.apache.uima.cas.impl.TypeSystemImpl.getAdjustedFeatureOffset(TypeSystemImpl.java:2575)
> 	at org.apache.uima.jcas.cas.AnnotationBase.<clinit>(AnnotationBase.java:71)
> 	... 27 more
> {noformat}
> Is it considered harmful to try getting a class object for a JCas FS class?



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