Allow the existence of a VME metaobject to be asserted

Test for the existence of a VME metaobject.  Otherwise, assertion of
a static cast result is not meaningful.

Change-Id: Ic9e9c38e5dce65c41d20e405c33e179334c37b00
Reviewed-by: Michael Brasser <michael.brasser@nokia.com>
Reviewed-by: Chris Adams <christopher.adams@nokia.com>

1 files changed, 14 insertions, 0 deletions

diff --git a/src/qml/qml/qqmlvmemetaobject_p.h b/src/qml/qml/qqmlvmemetaobject_p.h
index 1f44c63a47..c9992471d4 100644
--- a/src/qml/qml/qqmlvmemetaobject_p.h
+++ b/src/qml/qml/qqmlvmemetaobject_p.h
@@ -169,6 +169,8 @@ public:
 
     void connectAliasSignal(int index);
 
+    static inline QQmlVMEMetaObject *get(const QObject *obj);
+
 protected:
     virtual int metaCall(QMetaObject::Call _c, int _id, void **_a);
 
@@ -227,6 +229,18 @@ private:
     friend class QV8QObjectWrapper;
 };
 
+QQmlVMEMetaObject *QQmlVMEMetaObject::get(const QObject *obj)
+{
+    if (obj) {
+        if (QQmlData *data = QQmlData::get(obj)) {
+            if (data->hasVMEMetaObject)
+                return const_cast<QQmlVMEMetaObject *>(static_cast<const QQmlVMEMetaObject *>(obj->metaObject()));
+        }
+    }
+
+    return 0;
+}
+
 QT_END_NAMESPACE
 
 #endif // QQMLVMEMETAOBJECT_P_H