C++ (Cpp) sparql_append_string_literalの例

コード例 #1

ファイル: gtksearchenginetracker.c プロジェクト: nacho/gtk-

static void
gtk_search_engine_tracker_start (GtkSearchEngine *engine)
{
  GtkSearchEngineTracker *tracker;
  gchar	*search_text, *location_uri;
  GString *sparql;

  tracker = GTK_SEARCH_ENGINE_TRACKER (engine);

  if (tracker->priv->query_pending)
	  {
		  g_debug ("Attempt to start a new search while one is pending, doing nothing");
		  return;
	  }

  if (tracker->priv->query == NULL)
	  {
		  g_debug ("Attempt to start a new search with no GtkQuery, doing nothing");
		  return;
	  }

  search_text = _gtk_query_get_text (tracker->priv->query);
  location_uri = _gtk_query_get_location (tracker->priv->query);

  g_debug ("Query starting, search criteria:'%s', location:'%s'", search_text, location_uri);

#ifdef FTS_MATCHING
  /* Using FTS: */
  sparql = g_string_new ("SELECT nie:url(?urn) "
                         "WHERE {"
                         "  ?urn a nfo:FileDataObject ;"
                         "  tracker:available true ; "
                         "  fts:match ");
  sparql_append_string_literal (sparql, search_text);

  if (location_uri)
	  {
		  g_string_append (sparql, " . FILTER (fn:starts-with(nie:url(?urn),");
		  sparql_append_string_literal (sparql, location_uri);
		  g_string_append (sparql, "))");
	  }

  g_string_append (sparql, " } ORDER BY DESC(fts:rank(?urn)) ASC(nie:url(?urn))");
#else  /* FTS_MATCHING */
  /* Using filename matching: */
  sparql = g_string_new ("SELECT nie:url(?urn) "
                         "WHERE {"
                         "  ?urn a nfo:FileDataObject ;"
                         "    tracker:available true ."
                         "  FILTER (fn:contains(nfo:fileName(?urn),");
  sparql_append_string_literal (sparql, search_text);

  g_string_append (sparql, 
                   "))"
                   "} ORDER BY DESC(nie:url(?urn)) DESC(nfo:fileName(?urn))");
#endif /* FTS_MATCHING */

  tracker_sparql_connection_query_async (tracker->priv->connection,
                                         sparql->str,
                                         tracker->priv->cancellable,
                                         query_callback,
                                         tracker);
  g_string_free (sparql, TRUE);

  tracker->priv->query_pending = TRUE;
  g_free (search_text);
}

コード例 #2

ファイル: nemo-search-engine-tracker.c プロジェクト: 3dfxmadscientist/nemo

static void
nemo_search_engine_tracker_start (NemoSearchEngine *engine)
{
	NemoSearchEngineTracker *tracker;
	gchar	*search_text, *location_uri;
	GString *sparql;
	GList *mimetypes, *l;
	gint mime_count;

	tracker = NEMO_SEARCH_ENGINE_TRACKER (engine);

	if (tracker->details->query_pending) {
		return;
	}

	if (tracker->details->query == NULL) {
		return;
	}

	g_cancellable_reset (tracker->details->cancellable);

	search_text = nemo_query_get_text (tracker->details->query);
	location_uri = nemo_query_get_location (tracker->details->query);
	mimetypes = nemo_query_get_mime_types (tracker->details->query);

	mime_count = g_list_length (mimetypes);

#ifdef FTS_MATCHING
	/* Using FTS: */
	sparql = g_string_new ("SELECT nie:url(?urn) "
			       "WHERE {"
			       "  ?urn a nfo:FileDataObject ;"
			       "  tracker:available true ; ");

	if (mime_count > 0) {
		g_string_append (sparql, "nie:mimeType ?mime ;");
	}

	g_string_append (sparql, "  fts:match ");
	sparql_append_string_literal (sparql, search_text);

	if (location_uri || mime_count > 0) {
		g_string_append (sparql, " . FILTER (");
	
		if (location_uri)  {
			g_string_append (sparql, " fn:starts-with(nie:url(?urn),");
			sparql_append_string_literal (sparql, location_uri);
			g_string_append (sparql, ")");
		}

		if (mime_count > 0) {
			if (location_uri) {
				g_string_append (sparql, " && ");
			}

			g_string_append (sparql, "(");
			for (l = mimetypes; l != NULL; l = l->next) {
				if (l != mimetypes) {
					g_string_append (sparql, " || ");
				}

				g_string_append (sparql, "?mime = ");
				sparql_append_string_literal (sparql, l->data);
			}
			g_string_append (sparql, ")");
		}

		g_string_append (sparql, ")");
	}

	g_string_append (sparql, " } ORDER BY DESC(fts:rank(?urn)) ASC(nie:url(?urn))");
#else  /* FTS_MATCHING */
	/* Using filename matching: */
	sparql = g_string_new ("SELECT nie:url(?urn) "
			       "WHERE {"
			       "  ?urn a nfo:FileDataObject ;");

	if (mime_count > 0) {
		g_string_append (sparql, "nie:mimeType ?mime ;");
	}

	g_string_append (sparql, "    tracker:available true ."
			 "  FILTER (fn:contains(nfo:fileName(?urn),");

	sparql_append_string_literal (sparql, search_text);

	g_string_append (sparql, ")");

	if (location_uri)  {
		g_string_append (sparql, " && fn:starts-with(nie:url(?urn),");
		sparql_append_string_literal (sparql, location_uri);
		g_string_append (sparql, ")");
	}

	if (mime_count > 0) {
		g_string_append (sparql, " && ");
		g_string_append (sparql, "(");
		for (l = mimetypes; l != NULL; l = l->next) {
			if (l != mimetypes) {
				g_string_append (sparql, " || ");
			}

			g_string_append (sparql, "?mime = ");
			sparql_append_string_literal (sparql, l->data);
		}
		g_string_append (sparql, ")");
	}

	g_string_append (sparql, ")");


	g_string_append (sparql, 
			 "} ORDER BY DESC(nie:url(?urn)) DESC(nfo:fileName(?urn))");
#endif /* FTS_MATCHING */

	tracker_sparql_connection_query_async (tracker->details->connection,
					       sparql->str,
					       tracker->details->cancellable,
					       query_callback,
					       tracker);
	g_string_free (sparql, TRUE);

	tracker->details->query_pending = TRUE;

	g_free (search_text);
	g_free (location_uri);

	if (mimetypes != NULL) {
		g_list_free_full (mimetypes, g_free);
	}
}