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https://issues.apache.org/jira/browse/COCOON-2352?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15590441#comment-15590441
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Ben Fortuna commented on COCOON-2352:
-------------------------------------
My sincerest apologies, but I discovered a bug in the patch I submitted.
Unfortunately I had assumed we can cast an int to a char to encode the higher
order unicode characters, but of course this isn't possible and is why unicode
surrogate pairs exist in the first place..
So I had to make a slight change to the code (again) - I have updated two
files: XMLEncoder and XMLEncoderTestCase to ensure that after combining a
surrogate pair to a code point we are then correctly encoding the int value as
an HTML-compatible string.
https://github.com/apache/cocoon/pull/3/files
Thanks again, and fingers crossed there are no more changes required. :-)
> XMLEncoder doesn't support Unicode surrogate pairs
> --------------------------------------------------
>
> Key: COCOON-2352
> URL: https://issues.apache.org/jira/browse/COCOON-2352
> Project: Cocoon
> Issue Type: Bug
> Components: * Cocoon Core, Blocks: Serializers
> Affects Versions: 2.1.12
> Reporter: Ben Fortuna
> Assignee: Francesco Chicchiriccò
> Fix For: 2.1.13
>
>
> Whilst investigating an issue with the Sling project and support for emoji
> characters, I've come to notice that the XMLEncoder used by HTMLSerializer
> doesn't support Unicode surrogate pairs to represent higher order unicode
> characters.
> A simple unit test that demonstrates this issue is here:
> https://github.com/micronode/whistlepost/blob/master/whistlepost-rewrite-lib/src/test/groovy/org/apache/cocoon/components/serializers/encoding/XMLEncoderTest.groovy
> More background info here also: SLING-5973
> This seems to have been identified/addressed in other Apache projects also:
> https://issues.apache.org/jira/browse/THRIFT-3403?jql=text%20~%20%22surrogate%20pairs%22
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