Xalan must not expose bundled classes (bcel, regexp)
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Key: XALANJ-2436
URL: https://issues.apache.org/jira/browse/XALANJ-2436
Project: XalanJ2
Issue Type: Bug
Components: Xalan
Affects Versions: 2.7.1
Environment: any
Reporter: Holger Hoffstätte
Priority: Critical
I just spent the better part of half a day figuring out what caused the problem
outlined in
https://sourceforge.net/tracker/?func=detail&atid=614693&aid=1902137&group_id=96405.
Xalan bundles regexp and bcel, however since one of the recommened ways of
installing xalan is via the endorsed mechanism this will wreak serious havoc on
any other apps that use bcel. That would be less of a problem is xalan's
version were up to date, but as of 2.7.1 it still includes a version from the
early stone age (see XALANJ-2423). The solution is easy: when building the
aggregate jar, add an ant task to rewrite the bundled packages via jarjar
(http://code.google.com/p/jarjar/). This can be trivially added to the build
and creates a completely self-contained xalan jar that will not blow up the
world when endorsed.
I will attach a trivial rule file for jarjar that rewrites the embedded
packages which should immediately fix any collision problems. For more
information about how to use jarjar, see
http://code.google.com/p/jarjar/wiki/GettingStarted
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