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https://issues.apache.org/jira/browse/CONFIGURATION-26?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Oliver Heger resolved CONFIGURATION-26.
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Resolution: Fixed
While the requested feature is still not supported out of the box, it is now
possible to achieve the desired effect by using a custom {{ConversionHandler}}.
Each configuration object is now associated with a {{ConversionHandler}}
object. The conversion handler is responsible for all kinds of data type
conversions. This includes conversions from complex objects (like arrays or
lists) to single values. Here a custom {{ConversionHandler}} implementation can
hook in to return a verbatim string value or whatever it sees appropriate.
There is already a default implementation called {{DefaultConversionHandler}}
which offers some protected methods a subclass may override to adapt
conversions. The user's guide was updated to describe these new features.
> Consider returning a concatenation of the list properties with getString()
> --------------------------------------------------------------------------
>
> Key: CONFIGURATION-26
> URL: https://issues.apache.org/jira/browse/CONFIGURATION-26
> Project: Commons Configuration
> Issue Type: Bug
> Reporter: Ittay Dror
> Priority: Minor
> Fix For: 2.0
>
>
> in AbstractConfiguration.resolveContainerStore (javadoc):
> * Returns an object from the store described by the key. If the value is a
> * List object, replace it with the first object in the list.
> but what if getProperty returns a List because this is the type of the
> property?
> this code will silently grab the first elemen. I don't understand why.
> Probably
> the reason is that some class extending AbstractConfiguration returns List
> for
> properties. In this case I think the better approach is to have that class
> return the first element instead, rather than returning the List and letting
> AbstractConfiguration (which is used by many other implementations, including
> outside of the configuration package) handle it
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