QueueItemBranch.h

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00001 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 4 -*- */
00002 /* QueueItemBranch.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_QUEUEITEMBRANCH_H
00023 #define ZYPP_SOLVER_DETAIL_QUEUEITEMBRANCH_H
00024 
00025 #include <iosfwd>
00026 #include <list>
00027 #include <string>
00028 
00029 #include "zypp/solver/detail/Types.h"
00030 #include "zypp/solver/detail/QueueItem.h"
00031 
00033 namespace zypp
00034 { 
00035 
00036   namespace solver
00037   { 
00038 
00039     namespace detail
00040     { 
00041 
00043 //
00044 //      CLASS NAME : QueueItemBranch
00045 
00046 class QueueItemBranch : public QueueItem {
00047 
00048 
00049   private:
00050     std::string _label;
00051     QueueItemList _possible_qitems;
00052 
00053   public:
00054 
00055     QueueItemBranch (const ResPool & pool);
00056     virtual ~QueueItemBranch();
00057 
00058     // ---------------------------------- I/O
00059 
00060     virtual std::ostream & dumpOn( std::ostream & str ) const;
00061 
00062     friend std::ostream& operator<<(std::ostream & str, const QueueItemBranch & obj)
00063     { return obj.dumpOn (str); }
00064 
00065     // ---------------------------------- accessors
00066 
00067     QueueItemList possibleQItems (void) const { return _possible_qitems; }
00068 
00069     const std::string & label (void) const { return _label; }
00070     void setLabel (const std::string & label) { _label = label; }
00071 
00072     bool isEmpty (void) const { return _possible_qitems.empty(); }
00073 
00074     // ---------------------------------- methods
00075 
00076     virtual bool process (ResolverContext_Ptr context, QueueItemList & qil);
00077     virtual QueueItem_Ptr copy (void) const;
00078     virtual int cmp (QueueItem_constPtr item) const;
00079     virtual bool isRedundant (ResolverContext_Ptr context) const { return false; }
00080     virtual bool isSatisfied (ResolverContext_Ptr context) const { return false; }
00081 
00082     void addItem (QueueItem_Ptr subitem);
00083     bool contains (QueueItem_Ptr possible_subbranch);
00084 };
00085 
00087     };// namespace detail
00090   };// namespace solver
00093 };// namespace zypp
00095 #endif // ZYPP_SOLVER_DETAIL_QUEUEITEMBRANCH_H

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