Container.h

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/*
 * Copyright (c) [2004-2010] Novell, Inc.
 *
 * All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of version 2 of the GNU General Public License as published
 * by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, contact Novell, Inc.
 *
 * To contact Novell about this file by physical or electronic mail, you may
 * find current contact information at www.novell.com.
 */


#ifndef CONTAINER_H
#define CONTAINER_H

#include <list>

#include "storage/Volume.h"
#include "storage/StorageTypes.h"
#include "storage/StorageTmpl.h"


namespace storage
{
    using std::list;


    class Container : public Device
    {
    friend class Storage;
    protected:
        template<typename L1, typename L2> friend class ListListIterator;

        typedef std::list<Volume*> VCont;
        typedef VCont::iterator VIter;
        typedef VCont::const_iterator CVIter;
        typedef VCont::reverse_iterator RVIter;
        typedef VCont::const_reverse_iterator CRVIter;


    public:
        bool operator== ( const Container& rhs ) const
            { return( typ == rhs.typ && nm == rhs.nm && del == rhs.del ); }
        bool operator!= ( const Container& rhs ) const
            { return( !(*this==rhs) ); }
        bool operator< ( const Container& rhs ) const
            {
            if( typ != rhs.typ )
                return( typ<rhs.typ );
            else if( nm != rhs.nm )
                return( nm<rhs.nm );
            else
                return( !del );
            }
        bool operator<= ( const Container& rhs ) const
            { return( *this<rhs || *this==rhs ); }
        bool operator>= ( const Container& rhs ) const
            { return( !(*this<rhs) ); }
        bool operator> ( const Container& rhs ) const
            { return( !(*this<=rhs) ); }
        virtual bool equalContent( const Container& rhs ) const;

        void logDifference(std::ostream& log, const Container& rhs) const;
        virtual void logDifferenceWithVolumes(std::ostream& log, const Container& rhs) const = 0;

        virtual void getCommitActions(list<commitAction>& l) const;
        virtual void getToCommit(storage::CommitStage stage, list<const Container*>& col,
                                 list<const Volume*>& vol) const;

        virtual int commitChanges( storage::CommitStage stage );
        virtual int commitChanges( storage::CommitStage stage, Volume* vol );
        virtual void changeDeviceName( const string& old, const string& nw ) {}
        bool isEmpty() const;
        void getInfo( storage::ContainerInfo& info ) const;
        bool findVolume( const string& device, Volume*& vol );

        static bool notDeleted(const Container& c) { return !c.deleted(); }

// iterators over volumes of a container
    protected:
        // protected typedefs for iterators over volumes
        template< class Pred >
            struct ConstVolumePI { typedef ContainerIter<Pred, CVIter> type; };
        template< class Pred >
            struct VolumePI { typedef ContainerIter<Pred, VIter> type; };
        template< class Pred >
            struct VolumeI { typedef ContainerDerIter<Pred, typename VolumePI<Pred>::type, Volume> type; };
        typedef CheckFnc<const Volume> CheckFncVol;
        typedef CheckerIterator< CheckFncVol, ConstVolumePI<CheckFncVol>::type,
                                 CVIter, Volume> ConstVolPIterator;
        typedef CheckerIterator< CheckFncVol, VolumePI<CheckFncVol>::type,
                                 VIter, Volume> VolPIterator;
        typedef DerefIterator<VolPIterator,Volume> VolIterator;
        typedef IterPair<VolIterator> VolPair;

    public:
        // public typedefs for iterators over volumes
        template< class Pred >
            struct ConstVolumeI { typedef ContainerDerIter<Pred, typename ConstVolumePI<Pred>::type, const Volume> type; };
        template< class Pred >
            struct VolCondIPair { typedef MakeCondIterPair<Pred, typename ConstVolumeI<Pred>::type> type;};
        typedef DerefIterator<ConstVolPIterator,const Volume> ConstVolIterator;
        typedef IterPair<ConstVolIterator> ConstVolPair;

        // public member functions for iterators over volumes
        ConstVolPair volPair( bool (* CheckFnc)( const Volume& )=NULL ) const
            {
            return( ConstVolPair( volBegin( CheckFnc ), volEnd( CheckFnc ) ));
            }
        ConstVolIterator volBegin( bool (* CheckFnc)( const Volume& )=NULL ) const
            {
            return( ConstVolIterator( ConstVolPIterator(vols.begin(), vols.end(), CheckFnc )) );
            }
        ConstVolIterator volEnd( bool (* CheckFnc)( const Volume& )=NULL ) const
            {
            return( ConstVolIterator( ConstVolPIterator(vols.begin(), vols.end(), CheckFnc, true )) );
            }

        template< class Pred > typename VolCondIPair<Pred>::type volCondPair( const Pred& p ) const
            {
            return( VolCondIPair<Pred>::type( volCondBegin( p ), volCondEnd( p ) ) );
            }
        template< class Pred > typename ConstVolumeI<Pred>::type volCondBegin( const Pred& p ) const
            {
            return( ConstVolumeI<Pred>::type( vols.begin(), vols.end(), p ) );
            }
        template< class Pred > typename ConstVolumeI<Pred>::type volCondEnd( const Pred& p ) const
            {
            return( ConstVolumeI<Pred>::type( vols.begin(), vols.end(), p, true ) );
            }

    protected:
        // protected member functions for iterators over volumes
        VolPair volPair( bool (* CheckFnc)( const Volume& )=NULL )
            {
            return( VolPair( vBegin( CheckFnc ), vEnd( CheckFnc ) ));
            }
        VolIterator vBegin( bool (* CheckFnc)( const Volume& )=NULL )
            {
            return( VolIterator( VolPIterator(vols.begin(), vols.end(), CheckFnc )) );
            }
        VolIterator vEnd( bool (* CheckFnc)( const Volume& )=NULL )
            {
            return( VolIterator( VolPIterator(vols.begin(), vols.end(), CheckFnc, true )) );
            }

    public:

        Container(Storage* s, const string& name, const string& device, CType typ);
        Container(Storage* s, const string& name, const string& device, CType typ,
                  SystemInfo& systemInfo);
        Container(Storage* s, CType typ, const xmlNode* node);
        Container(const Container& c);
        virtual ~Container();

        void saveData(xmlNode* node) const;

        Storage* getStorage() const { return sto; }
        const Storage* getStorageConst() const { return sto; }
        CType type() const { return typ; }
        bool isPartitionable() const;
        static bool Partitionable( const Container&d ) 
            { return( d.isPartitionable() ); }
        bool isDeviceUsable() const;
        static bool DeviceUsable( const Container&d ) 
            { return( d.isDeviceUsable() ); }

        bool readonly() const { return ronly; }

        virtual Text removeText(bool doing) const;
        virtual Text createText(bool doing) const;
        virtual int resizeVolume( Volume* v, unsigned long long newSize );
        virtual int removeVolume( Volume* v );
        static storage::CType staticType() { return storage::CUNKNOWN; }
        friend std::ostream& operator<< (std::ostream& s, const Container &c );

        virtual Container* getCopy() const = 0; // Container is always derived

        bool compareContainer(const Container& rhs, bool verbose) const;
        void setExtError( const string& txt ) const;
        void setExtError( const SystemCmd& cmd, bool serr=true ) const;

    protected:
        typedef CVIter ConstPlainIterator;
        ConstPlainIterator begin() const { return vols.begin(); }
        ConstPlainIterator end() const { return vols.end(); }

        typedef VIter PlainIterator;
        PlainIterator begin() { return vols.begin(); }
        PlainIterator end() { return vols.end(); }

        virtual void print( std::ostream& s ) const { s << *this; }
        void addToList(Volume* e);
        bool removeFromList( Volume* e );
        virtual int doCreate( Volume * v );
        virtual int doRemove( Volume * v );
        virtual int doResize( Volume * v );

        virtual void logData(const string& Dir) const {}

        static bool stageDecrease(const Volume& v);
        static bool stageIncrease(const Volume& v);
        static bool stageFormat(const Volume& v);
        static bool stageMount(const Volume& v);

        Storage* const sto;
        const CType typ;
        bool ronly;

        VCont vols;

        mutable storage::ContainerInfo info; // workaround for broken ycp bindings

    private:

        Container& operator=(const Container&); // disallow

    };

}

#endif

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