tracker: more accurate supported keys

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@linux.intel.com>

1 files changed, 7 insertions, 2 deletions

diff --git a/src/media/tracker/grl-tracker-utils.c b/src/media/tracker/grl-tracker-utils.c
index e4a1205..14eecee 100644
--- a/src/media/tracker/grl-tracker-utils.c
+++ b/src/media/tracker/grl-tracker-utils.c
@@ -615,6 +615,11 @@ grl_tracker_get_media_name (const gchar *rdf_type,
 const GList *
 grl_tracker_supported_keys (GrlMetadataSource *source)
 {
-  return
-    grl_plugin_registry_get_metadata_keys (grl_plugin_registry_get_default ());
+  static GList *supported_keys = NULL;
+
+  if (!supported_keys) {
+    supported_keys =  g_hash_table_get_keys (grl_to_sparql_mapping);
+  }
+
+  return supported_keys;
 }