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https://issues.apache.org/jira/browse/UIMA-2849?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13682639#comment-13682639
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Marshall Schor commented on UIMA-2849:
--------------------------------------
a partial fix - improved the error message when this failure happens to
identify the position of the bad character.
> XMLSerializer is not robust to ascii control characters
> --------------------------------------------------------
>
> Key: UIMA-2849
> URL: https://issues.apache.org/jira/browse/UIMA-2849
> Project: UIMA
> Issue Type: Bug
> Components: Core Java Framework
> Affects Versions: 2.4.0SDK
> Reporter: Matthew Hatem
>
> If any strings in the CAS contain an ascii control character the
> XMLSerializer fails with exception below. XMLSerializer appears to be
> escaping other invalid XML characters like '&' and '<'. Perhaps it would be
> appropriate to remove control characters (or escape these characters as well
> in the case of XML 1.1).
> Workaround is to ensure all strings stored in the CAS do not contain ascii
> control characters.
> org.xml.sax.SAXParseException: Trying to serialize non-XML 1.0 character: ,
> 0x1c
> at
> org.apache.uima.util.XMLSerializer$CharacterValidatingContentHandler.checkForInvalidXmlChars(XMLSerializer.java:254)
> at
> org.apache.uima.util.XMLSerializer$CharacterValidatingContentHandler.startElement(XMLSerializer.java:174)
> at
> org.apache.uima.cas.impl.XmiCasSerializer$XmiCasDocSerializer.startElement(XmiCasSerializer.java:1003)
> at
> org.apache.uima.cas.impl.XmiCasSerializer$XmiCasDocSerializer.encodeFS(XmiCasSerializer.java:755)
> at
> org.apache.uima.cas.impl.XmiCasSerializer$XmiCasDocSerializer.encodeIndexed(XmiCasSerializer.java:700)
> at
> org.apache.uima.cas.impl.XmiCasSerializer$XmiCasDocSerializer.serialize(XmiCasSerializer.java:268)
> at
> org.apache.uima.cas.impl.XmiCasSerializer$XmiCasDocSerializer.access$700(XmiCasSerializer.java:108)
> at
> org.apache.uima.cas.impl.XmiCasSerializer.serialize(XmiCasSerializer.java:1516)
> at
> org.apache.uima.cas.impl.XmiCasSerializer.serialize(XmiCasSerializer.java:1496)
> at bugs.UimaXMIBug.writeXmi(UimaXMIBug.java:68)
> at bugs.UimaXMIBug.main(UimaXMIBug.java:38)
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