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https://issues.apache.org/jira/browse/CONFIGURATION-607?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14725751#comment-14725751
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Oliver Heger commented on CONFIGURATION-607:
--------------------------------------------

This is certainly a useful feature, and I also had thought about creating the 
definition for the combined configuration dynamically.

As described in 
http://commons.apache.org/proper/commons-configuration/userguide/howto_combinedbuilder.html#Setting_up_a_CombinedConfigurationBuilder,
 there is a hook which can be used to have more flexibility when defining the 
combined configuration: a builder can be passed in that returns the 
configuration with the definition. We could provide special builder 
implementations which construct such a definition configuration based on 
several criteria, e.g. all files in a directory matching a specific pattern.

I am pretty convinced that this functionality can be added without incompatible 
changes in the API. So it could be added after the 2.0 release; we could focus 
on getting 2.0 out first.

> Provide the ability to programmatically specify config sources for 
> ReloadingCombinedConfigurationBuilder
> --------------------------------------------------------------------------------------------------------
>
>                 Key: CONFIGURATION-607
>                 URL: https://issues.apache.org/jira/browse/CONFIGURATION-607
>             Project: Commons Configuration
>          Issue Type: Improvement
>          Components: File reloading
>    Affects Versions: 2.0
>            Reporter: Dzmitry Shylovich
>
> I have the following configuration files: 
> prop_test1.xml
> prop_test2.xml and so force.
> There is one default file - default.xml. 
> And I have to combine prop_test1.xml with default.xml  and get single 
> combined configuration.
> prop_test2.xml with default.xml and get another combined configuration. 
> With current solution I have to specify a configuration definition file for 
> every pair. I think it will be nice to have the ability to programmatically 
> specify files for ReloadingCombinedConfigurationBuilder.
> Something like:
> ReloadingCombinedConfigurationBuilder builder = new 
> ReloadingCombinedConfigurationBuilder()
>     .configure(params.fileBased().addFile(new File("test1.xml").addFile(new 
> File("default.xml")));



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