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https://issues.apache.org/jira/browse/CONFIGURATION-553?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13763446#comment-13763446
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Oliver Heger commented on CONFIGURATION-553:
--------------------------------------------
The {{FileSystem}} class provides the methods {{locateFromURL()}} and
{{getInputStream(String, String)}}. Both perform a search of the referenced
file based on the standard {{locate()}} method.
>From a logic point of view, the latter is just a convenience method of the
>former: first the URL is determined, then a stream is opened from it. However,
>in {{VFSFileSystem}}, there is a separate implementation of
>{{getInputStream()}} which seems to be pretty redundant to the code in
>{{locateFromURL()}}.
This {{getInputStream()}} method is called only from a single place:
{{CatalogResolver.resolveEntity()}}. In the same file for a very similar use
case the "official" {{locate()}} method of {{FileLocatorUtils}} is called
(which under the hood delegates to {{locateFromURL()}}). I am going to unify
this. Then {{getInputStream()}} is no longer used and can be removed from the
interface.
> Support custom search strategies for configuration files
> --------------------------------------------------------
>
> Key: CONFIGURATION-553
> URL: https://issues.apache.org/jira/browse/CONFIGURATION-553
> Project: Commons Configuration
> Issue Type: Improvement
> Affects Versions: 1.9
> Reporter: Oliver Heger
> Fix For: 2.0
>
>
> Via the {{FileSystem}} class it is already possible to influence locating and
> loading of configuration files. However, the API is quite complex, and it is
> not obvious which methods to override.
> It would be easier to have a specialized interface for a locator strategy.
> This would make the implementation of custom search strategies
> straight-forward. A default implementation of this interface can be provided
> which implements the currently used search algorithm (which is currently
> hard-coded in {{ConfigurationUtils}}).
> In general, there is room for improvements in the file system
> implementations. For instance, functionality seems to be partly implemented
> in {{ConfigurationUtils}} and partly in {{DefaultFileSystem}}. I would like
> to remove the code related to the localization of configuration files from
> {{ConfigurationUtils}} and create a specialized utility class in the {{io}}
> package.
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