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https://issues.apache.org/jira/browse/JENA-1537?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16459528#comment-16459528
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ASF GitHub Bot commented on JENA-1537:
--------------------------------------
GitHub user afs opened a pull request:
https://github.com/apache/jena/pull/413
JENA-1537: Remove dependency on Apache Xerces.
The dependency of Apache Xerces 2.11.0 can be removed by extracting the
necessary datatype validation code from Xerces and using the JDK XML parser.
The Xerces release jars `xercesImpl-2.11.0.jar` and `xml-apis-1.4.01.jar` are
no longer needed which has OSGi and JPMS advantages.
Impacts:
* Switch to using the JDK built-in XML parser (this affects any use of XML
in an application using Jena)
* Drop `XSDDatatype.loadUserDefined` - the necessary code isn't available
via JDK APIs
* Add package tree `org.apache.jena.ext.xerces` for the extracted datatype
validation and regex code (a SPARQL corner case)
* Remove Xerces from `pom.xml` and `jena-core/pom.xml`
* Remove Xerces from `jena-osgi/pom.xml`
* No checking of encoding mismatches between reader and XML charset
declaration (access to the XML Declaration is not available, at least not in
the same way)
The extracted code is only slightly cleaned up to keep some degree of
alignment with the original Xerces source. That code originates from a long
time ago and has a lot of warnings which have been suppressed.
There will also need to be a change to NOTICE to reflect NOTICE from Xerces
(it is already in the NOTICE for the distribution).
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/afs/jena xerces
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/jena/pull/413.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #413
----
commit c9a7e646be45d44f26b44e51187487f12f182b89
Author: Andy Seaborne <andy@...>
Date: 2018-04-30T17:26:05Z
JENA-1537: Remove dependency on Xerces. Import needed code
----
> Remove requirement for Apache Xerces.
> -------------------------------------
>
> Key: JENA-1537
> URL: https://issues.apache.org/jira/browse/JENA-1537
> Project: Apache Jena
> Issue Type: Improvement
> Components: Datatypes, RDF/XML
> Reporter: Andy Seaborne
> Assignee: Andy Seaborne
> Priority: Major
>
> Apache Xerces is used for parsing and also for dataype support.
> We can switch to the JDK built-in XML parser (which is actually a forked
> Xerces).
> For jena-core datatype, we can extract the necessary code from Xerces and put
> it in Jena (repackaged).
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