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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 Sat, 09 Sep 2017 04:48:00 GMT

    [ https://issues.apache.org/jira/browse/UIMA-5554?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16159739#comment-16159739
] 

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

I am currently using this option

{noformat}
Class.forName("myJCasClassName", false, this.getClass().getClassLoader())
{noformat}

It just seems a bit strange that a normal `Class.forName()` call fails with such an error.
I didn't even try to do anything with the sofa although the error message says "A JCas class
field "sofa" is being initialized...". Shouldn't the sofa be only set when I actually create
an instance of the class, i.e. in the constructor?

> 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
>
> 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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