Interface for a resource descriptor that abstracts from the actual
type of underlying resource, such as a file or class path resource.
An InputStream can be opened for every resource if it exists in
physical form, but a URL or File handle can just be returned for
certain resources. The actual behavior is implementation-specific.
An InputStream can be opened for every resource if it exists in physical form, but a URL or File handle can just be returned for certain resources. The actual behavior is implementation-specific.