SolutionAction.cc

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00001 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 4 -*- */
00002 /* SolutionAction.cc
00003  *
00004  * Easy-to use interface to the ZYPP dependency resolver
00005  *
00006  * Copyright (C) 2000-2002 Ximian, Inc.
00007  * Copyright (C) 2005 SUSE Linux Products GmbH
00008  *
00009  * This program is free software; you can redistribute it and/or
00010  * modify it under the terms of the GNU General Public License,
00011  * version 2, as published by the Free Software Foundation.
00012  *
00013  * This program is distributed in the hope that it will be useful, but
00014  * WITHOUT ANY WARRANTY; without even the implied warranty of
00015  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00016  * General Public License for more details.
00017  *
00018  * You should have received a copy of the GNU General Public License
00019  * along with this program; if not, write to the Free Software
00020  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00021  * 02111-1307, USA.
00022  */
00023 
00024 #include "zypp/solver/detail/Resolver.h"
00025 #include "zypp/solver/detail/SolutionAction.h"
00026 #include "zypp/CapSet.h"
00027 #include "zypp/base/Logger.h"
00028 #include "zypp/Dependencies.h"
00029 
00030 
00032 namespace zypp
00033 { 
00034 
00035   namespace solver
00036   { 
00037 
00038     namespace detail
00039     { 
00040 
00041 using namespace std;
00042 
00043 IMPL_PTR_TYPE(SolutionAction);
00044 IMPL_PTR_TYPE(TransactionSolutionAction);
00045 IMPL_PTR_TYPE(InjectSolutionAction);
00046 
00047 //---------------------------------------------------------------------------
00048 
00049 SolutionAction::SolutionAction()
00050 {
00051 }
00052 
00053 
00054 SolutionAction::~SolutionAction()
00055 {
00056 }
00057 
00058 
00059 //---------------------------------------------------------------------------
00060 
00061 ostream &
00062 TransactionSolutionAction::dumpOn( ostream& os) const
00063 {
00064     os << "TransactionSolutionAction: ";
00065     switch (_action) {
00066         case KEEP:      os << "Keep"; break;
00067         case INSTALL:   os << "Install"; break;
00068         case REMOVE:    os << "Remove"; break;
00069         case UNLOCK:    os << "Unlock"; break;      
00070     }
00071     os << " ";
00072     os << _item;
00073     os << endl;
00074     return os;
00075 }
00076 
00077 
00078 ostream&
00079 operator<<( ostream& os, const SolutionActionList & actionlist)
00080 {
00081     for (SolutionActionList::const_iterator iter = actionlist.begin(); iter != actionlist.end(); ++iter) {
00082         os << *(*iter);
00083         os << endl;
00084     }
00085     return os;
00086 }
00087 
00088 
00089 ostream&
00090 operator<<( ostream& os, const CSolutionActionList & actionlist)
00091 {
00092     for (CSolutionActionList::const_iterator iter = actionlist.begin(); iter != actionlist.end(); ++iter) {
00093         os << *(*iter);
00094         os << endl;
00095     }
00096     return os;
00097 }
00098 
00099 //---------------------------------------------------------------------------
00100 
00101 ostream &
00102 InjectSolutionAction::dumpOn( ostream& os ) const
00103 {
00104     os << "InjectSolutionAction: ";
00105     os << _capability;
00106     os << ", ";
00107     switch (_kind) {
00108         case REQUIRES:  os << "Requires"; break;
00109         case CONFLICTS: os << "Conflicts"; break;
00110         case OBSOLETES: os << "Obsoletes"; break;
00111         case INSTALLED: os << "Installed"; break;
00112         case ARCHITECTURE: os << "Architecture"; break;     
00113         default: os << "Wrong kind"; break;
00114     }
00115     os << " ";
00116     os << _item;            
00117     os << endl;
00118     return os;
00119 }
00120 
00121 //---------------------------------------------------------------------------
00122 
00123 
00124 ostream &
00125 SolutionAction::dumpOn( std::ostream & os ) const
00126 {
00127     os << "SolutionAction<";
00128     os << "not specified";
00129     os << "> ";
00130     return os;
00131 }
00132 
00133 
00134 bool 
00135 TransactionSolutionAction::execute(Resolver & resolver) const
00136 {
00137     bool ret = true;
00138     switch (action()) {
00139         case KEEP:
00140             resolver.addIgnoreInstalledItem( _item );
00141             /*FALLTHRU*/
00142         case INSTALL:
00143             if (_item.status().isToBeUninstalled())
00144                 ret = _item.status().setTransact (false, ResStatus::USER);
00145             else
00146                 _item.status().setToBeInstalled (ResStatus::USER);
00147             break;
00148         case REMOVE:
00149             if (_item.status().isToBeInstalled()) {
00150                 _item.status().setTransact (false,ResStatus::USER);
00151                 _item.status().setLock (true,ResStatus::USER); // no other dependency can set it again          
00152             } else if (_item.status().isInstalled())
00153                 _item.status().setToBeUninstalled (ResStatus::USER);
00154             else
00155                 _item.status().setLock (true,ResStatus::USER); // no other dependency can set it again          
00156             break;
00157         case UNLOCK:
00158             ret = _item.status().setLock (false, ResStatus::USER);
00159             if (!ret) ERR << "Cannot unlock " << _item << endl;
00160             break;
00161         default:
00162             ERR << "Wrong TransactionKind" << endl;
00163             ret = false;
00164     }
00165     return ret;
00166 }
00167 
00168 bool
00169 InjectSolutionAction::execute(Resolver & resolver) const
00170 {
00171     Dependencies dependencies = _item.resolvable()->deps();
00172     CapSet depList = dependencies[Dep::CONFLICTS];    
00173     switch (_kind) {
00174         case CONFLICTS:
00175             // removing conflict in both resolvables
00176             if (depList.find(_capability) != depList.end())
00177             {
00178                 resolver.addIgnoreConflict (_item, _capability);
00179             }
00180             dependencies = _otherItem.resolvable()->deps();
00181             depList = dependencies[Dep::CONFLICTS];
00182             if (depList.find(_capability) != depList.end())
00183             {
00184                 resolver.addIgnoreConflict (_otherItem, _capability);
00185             }
00186             break;
00187         case REQUIRES:
00188             // removing the requires dependency from the item
00189             resolver.addIgnoreRequires (_item, _capability);
00190             break;
00191         case ARCHITECTURE:
00192             // This item is for ALL architectures available
00193             resolver.addIgnoreArchitectureItem (_item);
00194             break;          
00195         case OBSOLETES:
00196             // removing the obsoletes dependency from the item
00197             resolver.addIgnoreObsoletes (_otherItem, _capability);
00198             break;          
00199         case INSTALLED:
00200             // ignoring already installed items
00201             resolver.addIgnoreInstalledItem (_item);
00202             resolver.addIgnoreInstalledItem (_otherItem);
00203             break;
00204         default:
00205             ERR << "No valid InjectSolutionAction kind found" << endl;
00206             return false;
00207     }
00208 
00209     return true;
00210 }
00211 
00213     };// namespace detail
00216   };// namespace solver
00219 };// namespace zypp

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