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#include <libtracker-sparql/tracker-sparql.h>
int main (int argc, const char **argv)
{
GError *error = NULL;
GVariant *v;
TrackerSparqlConnection *connection;
const gchar *query =
"INSERT { _:foo a nie:InformationElement } WHERE { ?x a rdfs:Class }";
connection = tracker_sparql_connection_bus_new ("org.freedesktop.Tracker1", NULL, NULL, &error);
if (!error) {
g_printerr ("Couldn't obtain a connection to the Tracker store: %s",
error->message);
g_clear_error (&error);
return 1;
}
/* Run a synchronous blank node update query */
v = tracker_sparql_connection_update_blank (connection,
query,
NULL,
&error);
if (error) {
/* Some error happened performing the query, not good */
g_printerr ("Couldn't update the Tracker store: %s",
error->message);
g_clear_error (&error);
g_object_unref (connection);
return 1;
}
if (!v) {
g_print ("No results were returned\n");
} else {
GVariantIter iter1, *iter2, *iter3;
const gchar *node;
const gchar *urn;
g_print ("Results:\n");
g_variant_iter_init (&iter1, v);
while (g_variant_iter_loop (&iter1, "aa{ss}", &iter2)) { /* aa{ss} */
while (g_variant_iter_loop (iter2, "a{ss}", &iter3)) { /* a{ss} */
while (g_variant_iter_loop (iter3, "{ss}", &node, &urn)) { /* {ss} */
g_print (" Node:'%s', URN:'%s'\n", node, urn);
}
}
}
g_variant_unref (v);
}
g_object_unref (connection);
return 0;
}
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