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https://issues.apache.org/jira/browse/UIMA-3142?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15459504#comment-15459504
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Richard Eckart de Castilho commented on UIMA-3142:
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CommonSerDes.isBinaryHeader(DataInputStream) meanwhile checks for the full
magic number. This appears to have been addressed along with UIMA-4792 or
before.
> CASImpl.reinit doesn't properly check magic number
> --------------------------------------------------
>
> Key: UIMA-3142
> URL: https://issues.apache.org/jira/browse/UIMA-3142
> Project: UIMA
> Issue Type: Improvement
> Components: Core Java Framework
> Reporter: Richard Eckart de Castilho
> Priority: Minor
>
> Binary CASes have a magic number at the beginning of the file/stream: "UIMA".
> Currently, this information is only used to check the byte order (first byte
> is checked for being U).
> CASImpl should also check if the other bytes of the magic number are correct
> and if not, it should throw an exception.
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