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Used to locate resources for DeploymentDescriptorParser.

This allows DeploymentDescriptorParser to be used outside a servlet container, but it still needs to work with a layout similar to the web application. If this can be abstracted away better, that would be nice.

Kohsuke Kawaguchi
public interface ResourceLoader {
Returns the actual location of the resource from the 'path' that represents a virtual locaion of a file inside a web application.

path Desiganates an absolute path within an web application, such as: '/WEB-INF/web.xml' or some such.
the actual location, if found, or null if not found.
    URL getResource(String paththrows MalformedURLException;

Gets the catalog XML file that should be consulted when loading resources from this ResourceLoader.
    URL getCatalogFile() throws MalformedURLException;

Returns the list of files in the given directory.

null if the path is invalid. empty if the path didn't contain any entry in it.
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