Expose datatype converter information via datatype API.

With test case.

lib/galaxy/webapps/galaxy/api/datatypes.py

@@ -101,6 +101,19 @@ class DatatypesController( BaseAPIController ):
             else:
                 raise
 
+    @expose_api_anonymous
+    def converters( self, trans, **kwd ):
+        converters = []
+        for (source_type, targets) in self._datatypes_registry.datatype_converters.iteritems():
+            for target_type in targets:
+                converters.append( {
+                    'source': source_type,
+                    'target': target_type,
+                    'tool_id': targets[ target_type ].id,
+                } )
+
+        return converters
+
     @property
     def _datatypes_registry( self ):
         return self.app.datatypes_registry

lib/galaxy/webapps/galaxy/buildapp.py

@@ -198,7 +198,7 @@ def populate_api_routes( webapp, app ):
     webapp.mapper.resource( 'datatype',
                             'datatypes',
                             path_prefix='/api',
-                            collection={ 'sniffers': 'GET', 'mapping' : 'GET' },
+                            collection={ 'sniffers': 'GET', 'mapping' : 'GET', 'converters': 'GET' },
                             parent_resources=dict( member_name='datatype', collection_name='datatypes' ) )
     #webapp.mapper.connect( 'run_workflow', '/api/workflow/{workflow_id}/library/{library_id}', controller='workflows', action='run', workflow_id=None, library_id=None, conditions=dict(method=["GET"]) )
     webapp.mapper.resource( 'search', 'search', path_prefix='/api' )

test/api/test_datatypes.py

@@ -43,6 +43,19 @@ class DatatypesApiTestCase( api.ApiTestCase ):
         xml_index = sniffer_list.index( "galaxy.datatypes.xml:GenericXml" )
         assert owl_index < xml_index
 
+    def test_converters( self ):
+        response = self._get( "datatypes/converters" )
+        self._assert_status_code_is( response, 200 )
+        converters_list = response.json()
+        found_fasta_to_tabular = False
+
+        for converter in converters_list:
+            self._assert_has_key( converter, "source", "target", "tool_id" )
+            if converter["source"] == "fasta" and converter["target"] == "tabular":
+                found_fasta_to_tabular = True
+
+        assert found_fasta_to_tabular
+
     def _index_datatypes( self, data={} ):
         response = self._get( "datatypes", data=data )
         self._assert_status_code_is( response, 200 )