iaupdate/IAD/engine/inc/iaupdatenode.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Fri, 12 Mar 2010 15:43:14 +0200
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/*
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* Copyright (c) 2007-2008 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description:   This file contains the header file of MIAUpdateNode class 
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*
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*/
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#ifndef IA_UPDATE_NODE_H
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#define IA_UPDATE_NODE_H
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#include <e32cmn.h>
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#include "iaupdateanynode.h"
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class MIAUpdateNodeObserver;
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/**
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 * MIAUpdateNode
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 * Interface for normal nodes.
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 *
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 * @note Implementations of MIAUpdateNode interface will always
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 * return MIAUpdateAnyNode::ENodeTypeNormal for MIAUpdateAnyNode::NodeType 
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 * function call.
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 *
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 * @see MIAUpateAnyNode
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 */
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class MIAUpdateNode : public MIAUpdateAnyNode
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    {    
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public:
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    /**
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     * Enumerates the possible types of nodes
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     **/
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    enum TPackageType
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        {
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        /** 
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         * The node content is independent SA package.
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         */
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        EPackageTypeSA,
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        /** 
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         * The node content is an upgrade SP package.
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         */
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        EPackageTypeSP,
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        /** 
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         * The node content is a patch update PU package.
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         */
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        EPackageTypePU,
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        /** 
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         * The node is a service pack.
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         * So, its content is given as separate packages
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         * that are included in this service pack.
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         */
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        EPackageTypeServicePack,
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       /** 
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        * The node content is widget.
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        */
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        EPackageTypeWidget
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0
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        };
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    /**
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     * @return TPackageType The type of this node content.
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     **/
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    virtual TPackageType Type() const = 0;
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    /**
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     * This function informs if the content of the node requires self updating.
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     * @return ETrue if the content is self updating. Else EFalse.
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     */
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    virtual TBool IsSelfUpdate() const = 0;
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    /**
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     * @note If hidden files are not included, the hierarchy behind them
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     * is still checked and visible nodes behind hidden nodes are also
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     * always included.
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     *
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     * @param aDependencies Pointer array supplied by the caller. 
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     * Dependency nodes are appended to it.
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     * @param aIncludeHidden ETrue means that hidden nodes are included. 
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     * EFalse means that hidden nodes are not included. Hidden nodes are
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     * not usually meant for UI side. But, in case of checking that
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     * all dependencies are handled correctly, all the nodes may be
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     * required.
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     **/
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    virtual void GetDependenciesL( 
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        RPointerArray< MIAUpdateNode >& aDependencies,
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        TBool aIncludeHidden ) const = 0;
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    /**
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     * @note If hidden files are not included, the hierarchy behind them
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     * is still checked and visible nodes behind hidden nodes are also
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     * always included.
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     *
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     * @param aDependants Pointer array supplied by the caller. 
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     * Dependant nodes are appended to it
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     * @param aIncludeHidden ETrue means that hidden nodes are included. 
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     * EFalse means that hidden nodes are not included. Hidden nodes are
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     * not usually meant for UI side. But, in case of checking that
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     * all dependencies are handled correctly, all the nodes may be
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     * required.
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     **/
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    virtual void GetDependantsL( 
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        RPointerArray< MIAUpdateNode >& aDependants,
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        TBool aIncludeHidden ) const = 0;
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    /**
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     * @return TBool ETrue if the node is downlaoded. Else EFalse.
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     **/
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    virtual TBool IsDownloaded() const = 0;  
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    /**
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     * @return TBool ETrue if the node is installed. Else EFalse.
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     **/
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    virtual TBool IsInstalled() const = 0;
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    /**
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     * Issue an operation for the node. Only one operation can be in progress at a time; 
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     * user has to always wait until previous operation has completed.
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     * 
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     * @param aObserver Observer of the operation
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     **/
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    virtual void DownloadL( MIAUpdateNodeObserver& aObserver ) = 0;
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    /**
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     * Issue an operation for the node. Only one operation can be in progress at a time; 
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     * user has to always wait until previous operation has completed.
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     * 
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     * @param aObserver Observer of the operation
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     **/
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    virtual void InstallL( MIAUpdateNodeObserver& aObserver ) = 0; 
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    /**
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     * Cancel an ongoing operation
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     **/    
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    virtual void CancelOperation() = 0;
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    /**
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     * Dependency hierarchy information may be usefull when dependency or dependant
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     * items are sorted for the operation flow. The dependant node always has smaller
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     * depth than its dependency node.
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     *
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     * @note This depth is counted from the longest dependency chain to the node.
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     * Node may belong to multiple dependency branches. In some of the branches, 
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     * the depth could be less than the greatest value that is given here.
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     *
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     * @return TInt This describes how deep in the dependency hierarchy
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     * this node is. Zero means that node is a root.
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     */
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    virtual TInt Depth() const = 0;
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protected:
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    virtual ~MIAUpdateNode() { }
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    };
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#endif  //  IA_UPDATE_NODE_H