Keep 'cause method names' in Lang 4.0 for ServletException
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Key: LANG-767
URL: https://issues.apache.org/jira/browse/LANG-767
Project: Commons Lang
Issue Type: Task
Affects Versions: 4.0
Reporter: Jens Bannmann
http://commons.apache.org/lang/article3_0.html#Deprecations says:
bq. The lone deprecation in 3.0 is that of the notion of 'cause method names'
in ExceptionUtils. In Java 5.0 it is still just about needed to handle some JDK
classes that have not been migrated to the getCause API. In Java 6.0 things
appear to be resolved and we will remove the related methods in Lang 4.0.
I see a problem with this plan: so far, javax.servlet.ServletException has not
been retrofitted to make use of the getCause() API for chaining. The Tomcat
project rejected a [bug
requesting|https://issues.apache.org/bugzilla/show_bug.cgi?id=36231] this in
2005, stating that it had to be changed in the spec. This is what a [bug at sun
requests|http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4395719], but that
is still open as of today.
Thus, if you remove all support for cause method names from ExceptionUtils in
Lang 4.0, web application authors would be forced to either write support glue
for ServletException themselves again, or keep a dependency for Lang 3.0
alongside. Both alternatives sound bad to me.
How about removing most of the cause method names, but keeping those that are
still required for dealing with widely used classes such as ServletException?
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