diff -r 000000000000 -r ba25891c3a9e ncdengine/inc/ncdnodeupgrade.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ncdengine/inc/ncdnodeupgrade.h	Thu Dec 17 08:51:10 2009 +0200
@@ -0,0 +1,161 @@
+/*
+* Copyright (c) 2006-2008 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:   Contains MNcdNodeUpgrade interface
+*
+*/
+
+
+#ifndef M_NCD_NODE_UPGRADE_H
+#define M_NCD_NODE_UPGRADE_H
+
+
+#include "catalogsbase.h"
+#include "ncdinterfaceids.h"
+#include "catalogsarray.h"
+
+
+class MNcdNode;
+
+
+/**
+ *  This interface is provided for the node if this node
+ *  contains an upgrade to the content of some other node.
+ *  UI may use this interface to check if the node contains
+ *  an upgrade.
+ *
+ *  This interface is available:
+ *
+ *  If the content of this node has been updated to server after the 
+ *  node was bought or this node upgrades some installed application, 
+ *  see EUpgradeContent
+ *
+ *  If this node upgrades some other node, see EUpgradeNode
+ *
+ *  This interface is NOT available if there is nothing to upgrade even if
+ *  the upgrades-dependency is defined in the protocol.
+ *
+ *  
+ */
+class MNcdNodeUpgrade : public virtual MCatalogsBase
+    {
+public:
+
+    /**
+     * Unique identifier for the interface, required for all MCatalogsBase interfaces.
+     *
+     * 
+     */
+    enum { KInterfaceUid = ENcdNodeUpgradeUid };
+
+
+    enum TUpgradeType
+        {
+                
+        /**
+         * Upgrades some other node
+         * @see UpgradeableNodeL()
+         */
+        EUpgradeNode,
+        
+        /**
+         * The server contains an upgrade for the content of this
+         * node
+         *
+         * This is used if the id in <downloadableContent> 
+         * matches some installed application and the application's version
+         * number is lower than the one in <downloadableContent> or
+         * if the protocol defines an upgrades-dependency to
+         * some application and that application is installed on the device
+         *
+         * @see MNcdNodeContentInfo
+         */
+        EUpgradeContent,
+                
+        /**
+         * Upgrade type is set to EUpgradeNotAvailable when the upgrade
+         * is installed.
+         */
+        EUpgradeNotAvailable
+        };
+
+    /**
+     * Retrieves the name of the upgrade content in text format.
+     *
+     * 
+     * @return Name of the upgrade content. If the protocol has not defined any value
+     *         for name, an empty descriptor is returned.
+     */
+    virtual const TDesC& Name() const = 0;
+
+    /**
+     * This function is the indicative Symbian application UID for the
+     * upgrade content that is an application. This can be used e.g. for checking
+     * if the application has already been installed to the phone.
+     *
+     * @return The UID of the upgrade application item.
+     */
+    virtual TUid Uid() const = 0;
+
+    /**
+     * Different versions of the content items may exist. Thus,
+     * a version identifier may be defined for the item. When installing
+     * applications the version may be required.
+     *
+     * @return Version string of the upgrade application item.  
+     * If the protocol has not defined any value, an empty string is returned.
+     */
+    virtual const TDesC& Version() const = 0;
+
+    /**
+     * Gives the target node that this node may upgrade.
+     *
+     * @note The reference count of the returned node object 
+     * is increased by one. So, Release function of the node 
+     * should be called when the node is not needed anymore.
+     *
+     * @note If the upgrade target has been directly gotten as a content
+     * instead of as a node, then NULL pointer is returned here. Name, Uid and Version
+     * information about the upgrade target content can still be requested by using
+     * the other functions of this interface.
+     *
+     * @return Pointer to the target node that this node upgrades.
+     *  NULL if the upgrade target has been given as a content intead of as a node.
+     *  Counted, Release() must be called after use.
+     * @exception Leave System wide error codes.
+     */
+    virtual MNcdNode* UpgradeableNodeL() const = 0;
+    
+
+    /**
+     * Upgrade type getter
+     *
+     * @return Type of the upgrade
+     * @see TUpgradeType
+     */     
+    virtual TUpgradeType UpgradeType() const = 0;
+    
+    
+protected:
+
+    /**
+     * Destructor.
+     *
+     * @see MCatalogsBase::~MCatalogsBase
+     */
+    virtual ~MNcdNodeUpgrade() {}
+
+    };
+
+
+#endif // M_NCD_NODE_UPGRADE_H