Commit 72337af1 authored by Carlos Garnacho's avatar Carlos Garnacho

libtracker-sparql: Handle correctly backreferences in TrackerResource tree

We do keep a notion of already visited TrackerResources when generating the
output. However that could go wrong if the TrackerResource references itself
or a "parent" TrackerResource.

Add the resources to the done list beforehand, so they are ensured not to be
visited again if such backreferences exist.

Related: tracker-miners#60
parent feff652b
Pipeline #72099 passed with stage
in 2 minutes and 17 seconds
......@@ -1025,11 +1025,9 @@ generate_nested_turtle_resource (TrackerResource *resource,
return;
if (g_list_find_custom (data->done_list, resource, (GCompareFunc) tracker_resource_compare) == NULL) {
data->done_list = g_list_prepend (data->done_list, resource);
generate_turtle (resource, data);
g_string_append (data->string, "\n");
data->done_list = g_list_prepend (data->done_list, resource);
}
}
......@@ -1260,7 +1258,7 @@ tracker_resource_print_turtle (TrackerResource *self,
context.all_namespaces = namespaces;
context.our_namespaces = tracker_namespace_manager_new ();
context.string = g_string_new ("");
context.done_list = NULL;
context.done_list = g_list_prepend (NULL, self);
maybe_intern_prefix_of_compact_uri (context.all_namespaces, context.our_namespaces, tracker_resource_get_identifier(self));
......@@ -1300,8 +1298,8 @@ generate_sparql_relation_deletes_foreach (gpointer key,
TrackerResource *relation = g_value_get_object (value);
if (g_list_find_custom (data->done_list, relation, (GCompareFunc) tracker_resource_compare) == NULL) {
generate_sparql_deletes (relation, data);
data->done_list = g_list_prepend (data->done_list, relation);
generate_sparql_deletes (relation, data);
}
}
}
......@@ -1323,8 +1321,8 @@ generate_sparql_relation_inserts_foreach (gpointer key,
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);
generate_sparql_insert_pattern (relation, data);
}
} else if (G_VALUE_HOLDS (value, G_TYPE_PTR_ARRAY)) {
GPtrArray *array = g_value_get_boxed (value);
......@@ -1349,8 +1347,8 @@ generate_sparql_relation_inserts_foreach (gpointer key,
(GCompareFunc) tracker_resource_compare) != NULL)
continue;
generate_sparql_insert_pattern (relation, data);
data->done_list = g_list_prepend (data->done_list, relation);
generate_sparql_insert_pattern (relation, data);
}
}
}
......@@ -1507,7 +1505,7 @@ tracker_resource_print_sparql_update (TrackerResource *resource,
/* Resources can be recursive, and may have repeated or even cyclic
* relationships. This list keeps track of what we already processed.
*/
context.done_list = NULL;
context.done_list = g_list_prepend (NULL, resource);
/* Delete the existing data. If we don't do this, we may get constraint
* violations due to trying to add a second value to a single-valued
......@@ -1516,7 +1514,7 @@ tracker_resource_print_sparql_update (TrackerResource *resource,
generate_sparql_deletes (resource, &context);
g_list_free (context.done_list);
context.done_list = NULL;
context.done_list = g_list_prepend (NULL, resource);
/* Finally insert the data */
g_string_append (context.string, "INSERT DATA {\n");
......@@ -1577,13 +1575,12 @@ generate_jsonld_value (const GValue *value,
resource = TRACKER_RESOURCE (g_value_get_object (value));
if (g_list_find_custom (data->done_list, resource, (GCompareFunc) tracker_resource_compare) == NULL) {
data->done_list = g_list_prepend (data->done_list, resource);
json_builder_begin_object (data->builder);
tracker_resource_generate_jsonld (resource, data);
json_builder_end_object (data->builder);
data->done_list = g_list_prepend (data->done_list, resource);
} else {
json_builder_add_string_value (data->builder, tracker_resource_get_identifier(resource));
}
......@@ -1680,7 +1677,7 @@ tracker_resource_print_jsonld (TrackerResource *self,
context.all_namespaces = namespaces;
context.our_namespaces = tracker_namespace_manager_new ();
context.builder = json_builder_new ();
context.done_list = NULL;
context.done_list = g_list_prepend (NULL, self);
maybe_intern_prefix_of_compact_uri (context.all_namespaces, context.our_namespaces, tracker_resource_get_identifier (self));
......
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