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https://issues.apache.org/jira/browse/XALANJ-2617?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17493637#comment-17493637
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Joe Kesselman commented on XALANJ-2617:
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Sanity check: What version number does that Xalan report? Either
OpenJDK is using a different release, or they're using a different
default configuration, or you've found a place where the compiled-mode
behavior of Xalan differs from the interpreted mode.
(I don't have time to dig into the details of your issue right now; I'll
try to look at it next week. I suspect this is arising because Xalan was
originally written with the assumption that text was all going to be
UTF16, so it's seeing the pair as two characters rather than one. I
thought we'd started addressing that, but it might only have been in the
IBM code.)
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> Serializer produces separately escaped surrogate pair instead of codepoint
> --------------------------------------------------------------------------
>
> Key: XALANJ-2617
> URL: https://issues.apache.org/jira/browse/XALANJ-2617
> Project: XalanJ2
> Issue Type: Bug
> Security Level: No security risk; visible to anyone(Ordinary problems in
> Xalan projects. Anybody can view the issue.)
> Components: Serialization, Xalan
> Affects Versions: 2.7.1, 2.7.2
> Reporter: Daniel Kec
> Assignee: Steven J. Hathaway
> Priority: Major
> Attachments: JI9053942.java,
> XALANJ-2617_Fix_missing_surrogate_pairs_support.patch,
> XALANJ-2617_java.patch, XALANJ-2617_test.patch
>
>
> When trying to serialize XML with char consisting of unicode surogate char
> "\uD840\uDC0B" I have tried several and non worked. XML Transformer creates
> XML string with escaped surogate pair separately, which makes XML
> unparseable. eg.: SAXParseException; Character reference "�" is an
> invalid XML character. It looks like a bug introduced in the XALANJ-2271 fix.
>
> {code:java|title=Output of Xalan ver. 2.7.2}
> kec@phoebe:~/Downloads$ java -version
> java version "1.8.0_171"
> Java(TM) SE Runtime Environment (build 1.8.0_171-b11)
> Java HotSpot(TM) 64-Bit Server VM (build 25.171-b11, mixed mode)
> kec@phoebe:~/Downloads$ java -cp
> /home/kec/.m2/repository/xml-apis/xml-apis/1.4.01/xml-apis-1.4.01.jar:/home/kec/.m2/repository/xalan/xalan/2.7.2/xalan-2.7.2.jar:/home/kec/.m2/repository/xalan/serializer/2.7.2/serializer-2.7.2.jar:.
> JI9053942
> Character: 𠀋
> EXPECTED: <?xml version="1.0" encoding="UTF-8"?><a>𠀋</a>
> ACTUAL: <?xml version="1.0" encoding="UTF-8"?><a>��</a>
> [Fatal Error] :1:50: Character reference "&#
> {code}
> {code:java|title=But Xalan ver. 2.7.0 works OK}
> kec@phoebe:~/Downloads$ java -cp
> /home/kec/.m2/repository/xml-apis/xml-apis/1.4.01/xml-apis-1.4.01.jar:/home/kec/.m2/repository/xalan/xalan/2.7.0/xalan-2.7.0.jar:/home/kec/.m2/repository/xalan/serializer/2.7.0/serializer-2.7.0.jar:.
> JI9053942
> Character: 𠀋
> EXPECTED: <?xml version="1.0" encoding="UTF-8"?><a>𠀋</a>
> ACTUAL: <?xml version="1.0" encoding="UTF-8"?><a>𠀋</a>
> ACTUAL PARSED CHAR 𠀋
> {code}
> {code:java|title=Test}
> String value = "\uD840\uDC0B";
> System.out.println("Character: " + value);
> System.out.println("EXPECTED: <?xml version=\"1.0\"
> encoding=\"UTF-8\"?><a>&#" + value.codePointAt(0) + ";</a>");
> StringWriter writer = new StringWriter();
> final DocumentBuilder documentBuilder =
> DocumentBuilderFactory.newInstance().newDocumentBuilder();
> Document dom = documentBuilder.newDocument();
> final Element rootEl = dom.createElement("a");
> rootEl.setTextContent(value);
> dom.appendChild(rootEl);
> Transformer transformer = TransformerFactory.newInstance().newTransformer();
> transformer.transform(new DOMSource(dom), new
> javax.xml.transform.stream.StreamResult(writer));
> String xml = writer.toString();
> System.out.println(" ACTUAL: " + xml);
> InputSource inputSource = new InputSource();
> inputSource.setCharacterStream(new StringReader(xml));
> System.out.println("ACTUAL PARSED CHAR " +
> documentBuilder.parse(inputSource).getDocumentElement().getTextContent());
> {code}
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