--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/graphicsutils/commongraphicsheaders/inc/extensioncontainer.h Tue Feb 02 01:47:50 2010 +0200
@@ -0,0 +1,56 @@
+// Copyright (c) 1995-2009 Nokia Corporation and/or its subsidiary(-ies).
+// All rights reserved.
+// This component and the accompanying materials are made available
+// under the terms of "Eclipse Public License v1.0"
+// which accompanies this distribution, and is available
+// at the URL "http://www.eclipse.org/legal/epl-v10.html".
+//
+// Initial Contributors:
+// Nokia Corporation - initial contribution.
+//
+// Contributors:
+//
+// Description:
+//
+
+#ifndef EXTENSIONCONTAINER_H_
+#define EXTENSIONCONTAINER_H_
+
+class CExtensionContainer:public CBase
+ {
+public:
+ /** Get Extension Interface.
+ * Implemented using the CBase::Extension_() mechanism
+ * Note that the pointer returned is only good for the lifetime of the called CBase derived object.
+ * @param aExtensionId The GUID/ Well-known ID of the interface
+ * @return pointer to the interface or NULL if not available
+ **/
+ inline TAny* GetInterface(TUint aExtensionId);
+ /** Get Extension Interface - templated helper.
+ * Resolves the ID and returned pointer based on the class name.
+ * Note that the pointer returned is only good for the lifetime of the called CBase derived object.
+ * Class name should support ETypeId intergral value, else use non-template version.
+ * @param MClass The class of the interface with embedded GUID / Well known ID
+ * @return pointer to the interface or NULL if not available
+ **/
+ template <class MClass> MClass* GetInterface()
+ {
+ return static_cast<MClass*>(GetInterface(MClass::ETypeId));
+ }
+ };
+
+inline TAny* CExtensionContainer::GetInterface(TUint aExtensionId)
+ {
+ TAny* retVal=NULL;
+ //Note that extension is intentionally not overloaded in CExtensionContainer
+ if (this->Extension_(aExtensionId,retVal,NULL)<KErrNone)
+ {
+ return NULL;
+ }
+ else
+ {
+ return retVal;
+ }
+ }
+
+#endif /* EXTENSIONCONTAINER_H_ */