[tracker] libtracker-sparql: Fix sparql/turtle generation of builtin classes

[Carlos Garnacho <carlosg src gnome org>]

commit ad26b15dd3ddc513730229b56c7fee0b900cbd05
Author: Carlos Garnacho <carlosg gnome org>
Date:   Mon Jan 2 19:26:31 2017 +0100

    libtracker-sparql: Fix sparql/turtle generation of builtin classes
    
    We don't need to generate sparql/turtle for builtin classes
    (eg. nmm:flash-on).
    
    https://bugzilla.gnome.org/show_bug.cgi?id=776723

 src/libtracker-sparql/tracker-resource.c |   25 +++++++++++++++++++++++++
 1 files changed, 25 insertions(+), 0 deletions(-)
---
diff --git a/src/libtracker-sparql/tracker-resource.c b/src/libtracker-sparql/tracker-resource.c
index f97f4be..f18d001 100644
--- a/src/libtracker-sparql/tracker-resource.c
+++ b/src/libtracker-sparql/tracker-resource.c
@@ -963,10 +963,30 @@ is_blank_node (const char *uri_or_curie_or_blank)
        return (strncmp(uri_or_curie_or_blank, "_:", 2) == 0);
 }
 
+gboolean
+is_builtin_class (const gchar             *uri_or_curie,
+                  TrackerNamespaceManager *namespaces)
+{
+       gchar *prefix = NULL;
+
+       prefix = g_uri_parse_scheme (uri_or_curie);
+
+       if (prefix &&
+           tracker_namespace_manager_has_prefix (namespaces, prefix))
+               return TRUE;
+
+       return FALSE;
+}
+
 void
 generate_nested_turtle_resource (TrackerResource    *resource,
                                  GenerateTurtleData *data)
 {
+       /* We don't need to produce turtle for builtin classes */
+       if (is_builtin_class (tracker_resource_get_identifier (resource),
+                             data->all_namespaces))
+               return;
+
        if (g_list_find_custom (data->done_list, resource, (GCompareFunc) tracker_resource_compare) == NULL) {
                generate_turtle (resource, data);
 
@@ -1264,6 +1284,11 @@ generate_sparql_relation_inserts_foreach (gpointer key,
        if (G_VALUE_HOLDS (value, TRACKER_TYPE_RESOURCE)) {
                TrackerResource *relation = g_value_get_object (value);
 
+               /* We don't need to produce inserts for builtin classes */
+               if (is_builtin_class (tracker_resource_get_identifier (relation),
+                                     data->namespaces))
+                       return;
+
                if (g_list_find_custom (data->done_list, relation, (GCompareFunc) tracker_resource_compare) 
== NULL) {
                        generate_sparql_insert_pattern (relation, data);
                        data->done_list = g_list_prepend (data->done_list, relation);