libzeitgeist: add "null event" handling

GetEvents returns null-events when a requested ID doesn't exist.

This commit fixes libzeitgeist to properly support this, by changing
zeitgeist_log_get_events to return GenericArray<Event?>.

https://bugs.freedesktop.org/show_bug.cgi?id=53016

1 files changed, 8 insertions, 4 deletions

diff --git a/examples/get-events-with-id.vala b/examples/get-events-with-id.vala
index 611933c9..32682372 100644
--- a/examples/get-events-with-id.vala
+++ b/examples/get-events-with-id.vala
@@ -1,7 +1,7 @@
 int main ()
 {
     var ids = new Array<uint32>();
-    uint32 id1 = 210;
+    uint32 id1 = 2100000;
     uint32 id2 = 222;
     ids.append_val(id1);
     ids.append_val(id2);
@@ -10,10 +10,14 @@ int main ()
 
     Zeitgeist.Log zg = new Zeitgeist.Log ();
     zg.get_events (ids, null, (obj, res) => {
-        Zeitgeist.ResultSet events = zg.get_events.end (res);
-        foreach (Zeitgeist.Event event in events)
+        GenericArray<Zeitgeist.Event?> events = zg.get_events.end (res);
+        for (int i = 0; i < events.length; ++i)
         {
-            stdout.printf ("Subject: %s\n", event.subjects[0].uri);
+            Zeitgeist.Event event = events[i];
+            if (event != null)
+                stdout.printf ("First subject: %s\n", event.subjects[0].uri);
+            else
+                stdout.printf ("Event %d doesn't exist.\n", (int) ids.index (i));
         }
         loop.quit();
     });