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From Oliver Heger <>
Subject Re: [configuration] Issues with XMLConfiguration
Date Tue, 13 Dec 2011 16:45:05 GMT
Hello Raimund,

many thanks for your feedback.

Am 13.12.2011 14:45, schrieb Klein, Raimund:
> Hi everyone,
> I've been playing around with configuration 1.7 for a while now, specifically XMLConfiguration
(since I'm a fan of hierarchical files) and the XPathExpressionEngine. Cool stuff. :-)
> However, I've run into two issues:
> - Since my file is nested a couple of levels, I like to create configuration nodes with
children myself and then add whole subtrees at the appropriate points. For the self-created
nodes, I rely on org.apache.commons.configuration.tree.DefaultConfigurationNode. I also like
the SubnodeConfiguration class while working on the subtree. However, I've found that when
really adding new nodes to the configuration, I can't simply add them to a matching SubnodeConfiguration,
as they won't be converted into XML Nodes, which causes possible ClassCastExceptions later
on. Instead, I have to add them to the XMLConfiguration directly. This is due to the fact
that XMLConfiguration overrides addNodes(String, Collection) and converts the nodes in the
Collection into its own XML nodes; however, SubnodeConfiguration of course doesn't do this.
I've been wondering whether this is intentional or maybe I'm completely missing the idea of
the class SubnodeConfiguration itself. Maybe XMLConfiguration
's configuration(s)At methods should return a subclass of SubnodeConfiguration which will
perform the same node conversion?

This is not by intension, it is rather a missing feature (well, maybe 
even a bug). Could you please open a ticket in our bug tracking system 
[1] for this? It's a good idea to let XMLConfiguration return a specific 
SubnodeConfiguraition with an overridden createNode() method.

> - Is there a way to assign a formatter to changed XMLConfigurations when saving? I've
found inspecting and maybe even changing the stored configuration files by hand a bit cumbersome,
as there is apparently no such thing as auto-indent. As I'm expecting my files to grow over
time, this would come in quite handy.

Unfortunately, there is no support for formatting yet. This would 
certainly be a nice new feature. However, I am not sure what would be a 
suitable interface for such a formatter?



> Other than that, I'm quite happy with what I've found so far. :-)
> Mit freundlichen Grüßen / Kind regards
> Raimund Klein
> EDV / Software Entwickler
> Joh. Berenberg, Gossler&  Co. KG
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