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https://issues.apache.org/jira/browse/XALANJ-2560?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17805304#comment-17805304
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Joe Kesselman commented on XALANJ-2560:
---------------------------------------
Comments from the mailing list:
[~ericjs] : Might be worth posting your analysis of what the JDK fork of Xalan
is doing differently that avoids this issue.
[~martin.honnen] (I hope that's the right one) suggests
{{[https://stackoverflow.com/a/74245232/252228]}} might be relevant.
[~stanio] cites the following as possibly relevant places to look, along with
ToXMLStream. Remember that this change should not affect anything but XML and
HTML serialization; other representations generally do not use SGML-syntax
Numeric Character References and should generally output the appropriate bytes
for that encoding (assuming the character is present in that encoding).
{{[https://github.com/openjdk/jdk/blob/jdk-21-ga/src/java.xml/share/classes/com/sun/org/apache/xml/internal/serializer/ToStream.java]
[https://github.com/openjdk/jdk/blob/jdk-21-ga/src/java.xml/share/classes/com/sun/org/apache/xml/internal/serializer/ToHTMLStream.java]}}
> ToXMLStream does not support unicode supplementary characters
> -------------------------------------------------------------
>
> Key: XALANJ-2560
> URL: https://issues.apache.org/jira/browse/XALANJ-2560
> 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
> Affects Versions: 2.7.1
> Environment: Xalan 2.7.1 serializer.
> Tested on Ubuntu 12.04 with Oracle JDK 1.7.0_05.
> Reporter: Damien Guillaume
> Assignee: Joe Kesselman
> Priority: Major
> Labels: serialization, unicode
>
> org.apache.xml.serializer.ToXMLStream (which extends ToStream) does not
> support serialization of unicode supplementary characters such as U+1D49C. It
> creates invalid characters entities like "��" instead of
> "𝒜" (or F0 9D 92 9C with UTF-8). ToXMLStream is used by LSSerializer
> when Xalan's serializer is on the classpath.
> org.apache.xml.serialize.DOMSerializerImpl (included in Xerces) does not have
> this problem, but it is deprecated since Xerces 2.9.0, so this is a
> regression.
> See
> http://stackoverflow.com/questions/11952289/serializing-supplementary-unicode-characters-into-xml-documents-with-java
> for more details.
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