issue #8: added definition for rdf-filesystem

.travis.yml

@@ -1,7 +1,7 @@
 env:
     global:
-        - METADATA_STORAGE_API_STORAGE_TYPE=XML-FILESYSTEM
-        - METADATA_STORAGE_API_STORAGE_LOCATION="sandbox/collections.xml"
+        - METADATA_STORAGE_API_STORAGE_TYPE=RDF-FILESYSTEM
+        - METADATA_STORAGE_API_STORAGE_LOCATION="sandbox/collections.rdf"
 language: python
 python:
     - "3.5"

debug.sh

@@ -1,6 +1,8 @@
 #!/bin/bash
 echo "METADATA_STORAGE_API_STORAGE_TYPE: ${METADATA_STORAGE_API_STORAGE_TYPE}"
 echo "METADATA_STORAGE_API_STORAGE_LOCATION: ${METADATA_STORAGE_API_STORAGE_LOCATION}"
+METADATA_STORAGE_API_STORAGE_TYPE=XML-FILESYSTEM
+METADATA_STORAGE_API_STORAGE_LOCATION=/mnt/C/Users/tyler/Documents/Github/ldr_metadatastorage/sandbox/collections.xml
 APP_SAVE=$FLASK_APP
 FLASK_APP=metadatastorageapi
 python -m flask run

metadatastorageapi/blueprint/storagelib/rdffilesystemstorage.py

@@ -10,4 +10,16 @@ def __init__(self, file_path):
     def find_root_collections(self):
         root = URIRef("http://metadatastorage.lib.uchicago.edu/collection/ldr")
         [x for x in g.subjects() if x == root]
+        return []
 
+    def find_specific_collection(self, identifier):
+        return []
+
+    def find_extension(self, extension):
+        return None
+
+    def find_collection_extensions(self, collection_id):
+        return []
+
+    def find_core_metadata(self, collection_id):
+        return {}