QueueItemRequire.h

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00001 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 4 -*- */
00002 /* QueueItemRequire.h
00003  *
00004  * Copyright (C) 2000-2002 Ximian, Inc.
00005  * Copyright (C) 2005 SUSE Linux Products GmbH
00006  *
00007  * This program is free software; you can redistribute it and/or
00008  * modify it under the terms of the GNU General Public License,
00009  * version 2, as published by the Free Software Foundation.
00010  *
00011  * This program is distributed in the hope that it will be useful, but
00012  * WITHOUT ANY WARRANTY; without even the implied warranty of
00013  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00014  * General Public License for more details.
00015  *
00016  * You should have received a copy of the GNU General Public License
00017  * along with this program; if not, write to the Free Software
00018  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00019  * 02111-1307, USA.
00020  */
00021 
00022 #ifndef ZYPP_SOLVER_DETAIL_QUEUEITEMREQUIRE_H
00023 #define ZYPP_SOLVER_DETAIL_QUEUEITEMREQUIRE_H
00024 
00025 #include <iosfwd>
00026 #include <list>
00027 #include <string>
00028 
00029 #include "zypp/solver/detail/QueueItem.h"
00030 
00031 #include "zypp/Capability.h"
00032 
00034 namespace zypp
00035 { 
00036 
00037   namespace solver
00038   { 
00039 
00040     namespace detail
00041     { 
00042 
00044 //      CLASS NAME : QueueItemRequire_Ptr
00045 //      CLASS NAME : QueueItemRequire_constPtr
00047 DEFINE_PTR_TYPE(QueueItemRequire);
00048 
00050 //
00051 //      CLASS NAME : QueueItemRequire
00052 
00053 class QueueItemRequire : public QueueItem {
00054 
00055   private:
00056     const Capability _capability;               // the required capability
00057     bool _soft;
00058 
00059     PoolItem_Ref _requiring_item;               // who's requiring it
00060 
00061     PoolItem_Ref _upgraded_item;
00062     PoolItem_Ref _lost_item;
00063 
00064     bool _remove_only;
00065     bool _is_child;
00066 
00067   public:
00068 
00069     QueueItemRequire (const ResPool & pool, const Capability & cap, bool soft = false);
00070     virtual ~QueueItemRequire();
00071 
00072     // ---------------------------------- I/O
00073 
00074     virtual std::ostream & dumpOn( std::ostream & str ) const;
00075 
00076     friend std::ostream & operator<<(std::ostream & str, const QueueItemRequire & obj)
00077     { return obj.dumpOn (str); }
00078 
00079     // ---------------------------------- accessors
00080 
00081     bool isSoft (void) const { return _soft; }
00082 
00083     const Capability & capability (void) const { return _capability; }
00084 
00085     void setRemoveOnly (void) { _remove_only = true; }
00086     void setUpgradedPoolItem (PoolItem_Ref upgraded_item) { _upgraded_item = upgraded_item; }
00087     void setLostPoolItem (PoolItem_Ref lost_item) { _lost_item = lost_item; }
00088 
00089     // ---------------------------------- methods
00090 
00091     virtual bool process (ResolverContext_Ptr context, QueueItemList & qil);
00092     virtual QueueItem_Ptr copy (void) const;
00093     virtual int cmp (QueueItem_constPtr item) const;
00094     virtual bool isRedundant (ResolverContext_Ptr context) const { return false; }
00095     virtual bool isSatisfied (ResolverContext_Ptr context) const { return false; }
00096 
00097     void addPoolItem (PoolItem_Ref item);
00098 
00099 
00100 };
00101 
00103     };// namespace detail
00106   };// namespace solver
00109 };// namespace zypp
00111 
00112 #endif // ZYPP_SOLVER_DETAIL_QUEUEITEMREQUIRE_H

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