Add restore as deprecated old path to RDF.

It will be in many old datatype_conf.xml files so perhaps it should be deprecated before removing it completely. Using this new infrastructure - people will be warned if the they load it from the old location and told to update datatypes_conf.xml to reference the new location.

lib/galaxy/datatypes/data.py

@@ -46,6 +46,26 @@ def __init__( cls, name, bases, dict_ ):
         metadata.Statement.process( cls )
 
 
+def deprecated_datatype_reference(klass):
+    """ Decorate an older class location to indicate that the class has been
+    moved to a new module. See graph.py as an example.
+    """
+    old_init = klass.__init__
+
+    def new_init(self, *args, **kwargs):
+        old_location = "%s.%s" % (klass.__module__, klass.__name__)
+        new_klass = klass.__bases__[0]
+        new_location = "%s.%s" % (new_klass.__module__, new_klass.__name__)
+        message = "Using deprecated reference to class [%s] " % old_location
+        message += "update datatype configuration to reference [%s]" % new_location
+        log.warn(message)
+        old_init(self, *args, **kwargs)
+
+    klass.__init__ = new_init
+
+    return klass
+
+
 @dataproviders.decorators.has_dataproviders
 class Data( object ):
     """

lib/galaxy/datatypes/graph.py

@@ -8,6 +8,7 @@
 
 import dataproviders
 from galaxy.util import simplegraph
+from . import triples
 
 import logging
 log = logging.getLogger( __name__ )
@@ -159,3 +160,8 @@ def __iter__( self ):
                         graph.add_edge( source_id, target_id, type=relation )
 
         yield graph.as_dict()
+
+
+@data.deprecated_datatype_reference
+class Rdf(triples.Rdf):
+    pass