[rygel] core: satisfied_by() is now async and abstract

[Zeeshan Ali Khattak <zeeshanak src gnome org>]

commit dc5c6b8cd02e203e131a2bb8341c6bf5b23e0f62
Author: Zeeshan Ali (Khattak) <zeeshanak gnome org>
Date:   Tue Nov 3 20:18:14 2009 +0200

    core: satisfied_by() is now async and abstract
    
    core: SearchCriteria.satisfied_by() is now async and abstract.

 src/rygel/rygel-search-criteria-parser.vala |    8 ++++++++
 src/rygel/rygel-search-expression.vala      |   12 +++++++++---
 2 files changed, 17 insertions(+), 3 deletions(-)
---
diff --git a/src/rygel/rygel-search-criteria-parser.vala b/src/rygel/rygel-search-criteria-parser.vala
index 4113441..c95f126 100644
--- a/src/rygel/rygel-search-criteria-parser.vala
+++ b/src/rygel/rygel-search-criteria-parser.vala
@@ -150,6 +150,10 @@ internal class Rygel.SearchCriteriaParser : Object, StateMachine {
 private class Rygel.OpenningBrace: Rygel.SearchExpression<void *,
                                                           void *,
                                                           void *> {
+    public override async bool satisfied_by (MediaObject media_object) {
+        assert_not_reached ();
+    }
+
     public override string to_string () {
         assert_not_reached ();
     }
@@ -158,6 +162,10 @@ private class Rygel.OpenningBrace: Rygel.SearchExpression<void *,
 private class Rygel.ClosingBrace: Rygel.SearchExpression<void *,
                                                          void *,
                                                          void *> {
+    public override async bool satisfied_by (MediaObject media_object) {
+        assert_not_reached ();
+    }
+
     public override string to_string () {
         assert_not_reached ();
     }
diff --git a/src/rygel/rygel-search-expression.vala b/src/rygel/rygel-search-expression.vala
index ac9bd8f..775b19d 100644
--- a/src/rygel/rygel-search-expression.vala
+++ b/src/rygel/rygel-search-expression.vala
@@ -36,15 +36,17 @@ public abstract class Rygel.SearchExpression<G,H,I> {
     public H operand1;
     public I operand2;
 
-    public bool satisfied_by (MediaObject media_object) {
-        return true;
-    }
+    public abstract async bool satisfied_by (MediaObject media_object);
 
     public abstract string to_string ();
 }
 
 public class Rygel.AtomicExpression :
               Rygel.SearchExpression<SearchCriteriaOp,string,string> {
+    public override async bool satisfied_by (MediaObject media_object) {
+        return true;
+    }
+
     public override string to_string () {
         return "%s %d %s".printf (this.operand1, this.op, this.operand2);
     }
@@ -54,6 +56,10 @@ public class Rygel.LogicalExpression :
               Rygel.SearchExpression<LogicalOperator,
                                      SearchExpression,
                                      SearchExpression> {
+    public override async bool satisfied_by (MediaObject media_object) {
+        return true;
+    }
+
     public override string to_string () {
         return "(%s %d %s)".printf (this.operand1.to_string (),
                                     this.op,