[tracker] Throwing an error when an unsupported operation is requested

[Philip Van Hoof <pvanhoof src gnome org>]

commit 489c1dbc9feb32484c31fa017100ac06c1ebc3fe
Author: Philip Van Hoof <philip codeminded be>
Date:   Fri Jul 31 11:35:14 2009 +0200

    Throwing an error when an unsupported operation is requested

 src/libtracker-data/tracker-sparql-query.vala |    7 ++++---
 1 files changed, 4 insertions(+), 3 deletions(-)
---
diff --git a/src/libtracker-data/tracker-sparql-query.vala b/src/libtracker-data/tracker-sparql-query.vala
index f714a86..89ab894 100644
--- a/src/libtracker-data/tracker-sparql-query.vala
+++ b/src/libtracker-data/tracker-sparql-query.vala
@@ -22,7 +22,8 @@ public errordomain Tracker.SparqlError {
 	UNKNOWN_CLASS,
 	UNKNOWN_PROPERTY,
 	TYPE,
-	INTERNAL
+	INTERNAL,
+	UNSUPPORTED
 }
 
 public class Tracker.SparqlQuery : Object {
@@ -1099,7 +1100,7 @@ public class Tracker.SparqlQuery : Object {
 		return false;
 	}
 
-	void visit_filter (Rasqal.Expression expr, bool is_datetime = false) {
+	void visit_filter (Rasqal.Expression expr, bool is_datetime = false) throws SparqlError {
 		switch (expr.op) {
 		case Rasqal.Op.AND:
 		case Rasqal.Op.OR:
@@ -1215,7 +1216,7 @@ public class Tracker.SparqlQuery : Object {
 			pattern_sql.append (")");
 			break;
 		default:
-			break;
+				throw new SparqlError.UNSUPPORTED ("Unsupported operation");
 		}
 	}