Am 17.11.2011 00:34, schrieb Tim Bessie:
Thanks Oliver - unfortunately, that is not quite the same issue I'm talking
about.
Mostly, this is because I want to use CompositeConfiguration; I don't
require structure in my configurations and don't want to have to deal with
the concepts CombinedConfiguration uses (nodes, views, etc.).
Just a simple, layered configuration concept like CompositeConfiguration
provides, and the ability to say "where did the value for this key come
from", not "what is the ONLY configuration object this key is defined in".
Perhaps we need another method - getFirstSource(String key), where the
source config returned is the one where key is first defined in the child
configurations, regardless of whether that key is defined again in a later
child config?
Where would I request such a feature? Would that be hard to implement?
Seems to be a common sort of requirement.
- Tim
Just open an enhancement ticket in Jira, our bug-tracking system [1]
with a detailed description of what you want to achieve.
From your explanation above I have the impression that this feature is
not too complicated to implemented. But we will see when the ticket has
been created.
Oliver
[1] http://commons.apache.org/configuration/issue-tracking.html
On Wed, Nov 16, 2011 at 1:34 PM, Oliver Heger
<oliver.he...@oliver-heger.de>wrote:
Am 16.11.2011 22:24, schrieb Tim Bessie:
I have been trying to use commons-configuration, especially the
CompositeConfiguration object (and have looked into
CombinedConfiguration),
and I have a need to be able to ask "Which child configuration object did
a given key's value derive from?"
I had thought that CompositeConfiguration.**getSource() would tell me,
but if
we have:
source A:
x.prop1=hello
source B:
x.prop1=goodbye
source DEFAULT:
x.prop1=You didn't set a value
and I call getSource("x.prop1"), I'll get an IllegalArgumentException,
since x.prop1 exists in all 3 child configurations.
What I was hoping for was something that would be consistent with
getProperty("x.prop1"); since that would return the value from "source A"
(since that was where it was first found), I was hoping there'd be some
method that could tell me "in which child configuration was the value you
got found", but there doesn't seem to be any way to do this.
Why is this vital functionality missing? Or am I missing something in the
documentation?
There is an open bug report [1] related to this issue. Maybe the
discussion in this ticket answers some of your questions.
Oliver
[1]
https://issues.apache.org/**jira/browse/CONFIGURATION-443<https://issues.apache.org/jira/browse/CONFIGURATION-443>
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