add QXmppClient::findExtension<T>() to find a given client extension

1 files changed, 16 insertions, 0 deletions

diff --git a/src/QXmppClient.h b/src/QXmppClient.h
index 0afae063..6683f32f 100644
--- a/src/QXmppClient.h
+++ b/src/QXmppClient.h
@@ -97,6 +97,22 @@ public:
     void addExtension(QXmppClientExtension *extension);
     QList<QXmppClientExtension*> extensions();
 
+    /// Returns the extension than can be cast to type T, or 0 if there is
+    /// no such extension.
+    ///
+    template<typename T>
+    T findExtension()
+    {
+        QList<QXmppClientExtension*> list = extensions();
+        for (int i = 0; i < list.size(); ++i)
+        {
+            T extension = qobject_cast<T>(list.at(i));
+            if (extension)
+                return extension;
+        }
+        return 0;
+    }
+
     void connectToServer(const QXmppConfiguration&,
                          const QXmppPresence& initialPresence = 
                          QXmppPresence());