This action simply checks to see if a resource identified by the src
sitemap attribute exists or not. The action returns empty Map if
resource exists, null otherwise.
Instead of src attribute, source can be specified using
parameter named url (this is old syntax, should be removed soon).
NOTE:org.apache.cocoon.selection.ResourceExistsSelector should be preferred to this component, as the semantics of a Selector better
matches the supplied functionality.
author: Donald Ball version: CVS $Id: ResourceExistsAction.java 433543 2006-08-22 06:22:54Z crossley $