SolutionAction.cc

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 4 -*- */
/* SolutionAction.cc
 *
 * Easy-to use interface to the ZYPP dependency resolver
 *
 * Copyright (C) 2000-2002 Ximian, Inc.
 * Copyright (C) 2005 SUSE Linux Products GmbH
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License,
 * version 2, 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, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
 * 02111-1307, USA.
 */

#define ZYPP_USE_RESOLVER_INTERNALS

#include "zypp/solver/detail/Resolver.h"
#include "zypp/solver/detail/SolutionAction.h"
#include "zypp/solver/detail/SolverQueueItem.h"
#include "zypp/Capabilities.h"
#include "zypp/base/Logger.h"

namespace zypp
{ 
  namespace solver
  { 
    namespace detail
    { 

using namespace std;

IMPL_PTR_TYPE(SolutionAction);

//---------------------------------------------------------------------------

SolutionAction::SolutionAction()
{
}


SolutionAction::~SolutionAction()
{
}


//---------------------------------------------------------------------------

ostream &
TransactionSolutionAction::dumpOn( ostream& os) const
{
    os << "TransactionSolutionAction: ";
    switch (_action) {
        case KEEP:                      os << "Keep " << _item; break;
        case INSTALL:                   os << "Install " << _item; break;
        case REMOVE:                    os << "Remove " << _item; break;
        case UNLOCK:                    os << "Unlock " << _item; break;
        case LOCK:                      os << "Lock " << _item; break;
        case REMOVE_EXTRA_REQUIRE:      os << "Remove require " << _capability; break;
        case REMOVE_EXTRA_CONFLICT:     os << "Remove conflict " << _capability; break;
        case ADD_SOLVE_QUEUE_ITEM:      os << "Add SolveQueueItem " <<  _solverQueueItem; break;
        case REMOVE_SOLVE_QUEUE_ITEM:   os << "Remove SolveQueueItem " <<  _solverQueueItem; break;
    }
    return os;
}


ostream&
operator<<( ostream& os, const SolutionActionList & actionlist)
{
    for (SolutionActionList::const_iterator iter = actionlist.begin(); iter != actionlist.end(); ++iter) {
        os << *(*iter);
        os << endl;
    }
    return os;
}

//---------------------------------------------------------------------------

ostream &
InjectSolutionAction::dumpOn( ostream& os ) const
{
    os << "InjectSolutionAction: ";
    switch (_kind) {
        case WEAK:      os << "Weak"; break;
        default: os << "Wrong kind"; break;
    }
    os << " ";
    os << _item;
    return os;
}

//---------------------------------------------------------------------------


ostream &
SolutionAction::dumpOn( std::ostream & os ) const
{
    os << "SolutionAction<";
    os << "not specified";
    os << "> ";
    return os;
}


bool
TransactionSolutionAction::execute(ResolverInternal & resolver) const
{
    bool ret = true;
    switch (action()) {
        case KEEP:
            _item.status().resetTransact (ResStatus::USER);
            ret = _item.status().setTransact (false, ResStatus::APPL_HIGH); // APPL_HIGH: Locking should not be saved permanently
            break;
        case INSTALL:
            if (_item.status().isToBeUninstalled())
                ret = _item.status().setTransact (false, ResStatus::USER);
            else
                _item.status().setToBeInstalled (ResStatus::USER);
            break;
        case REMOVE:
            if (_item.status().isToBeInstalled()) {
                _item.status().setTransact (false,ResStatus::USER);
                _item.status().setLock (true,ResStatus::USER); // no other dependency can set it again
            } else if (_item.status().isInstalled())
                _item.status().setToBeUninstalled (ResStatus::USER);
            else
                _item.status().setLock (true,ResStatus::USER); // no other dependency can set it again
            break;
        case UNLOCK:
            ret = _item.status().setLock (false, ResStatus::USER);
            if (!ret) ERR << "Cannot unlock " << _item << endl;
            break;
        case LOCK:
            _item.status().resetTransact (ResStatus::USER);
            ret = _item.status().setLock (true, ResStatus::APPL_HIGH); // APPL_HIGH: Locking should not be saved permanently
            if (!ret) ERR << "Cannot lock " << _item << endl;
            break;
        case REMOVE_EXTRA_REQUIRE:
            resolver.removeExtraRequire (_capability);
            break;
        case REMOVE_EXTRA_CONFLICT:
            resolver.removeExtraConflict (_capability);
            break;
        case ADD_SOLVE_QUEUE_ITEM:
            resolver.addQueueItem(_solverQueueItem);
            break;
        case REMOVE_SOLVE_QUEUE_ITEM:
            resolver.removeQueueItem(_solverQueueItem);
            break;
        default:
            ERR << "Wrong TransactionKind" << endl;
            ret = false;
    }
    return ret;
}

bool
InjectSolutionAction::execute(ResolverInternal & resolver) const
{
    switch (_kind) {
        case WEAK:
            // set item dependencies to weak
            resolver.addWeak (_item);
            break;
        default:
            ERR << "No valid InjectSolutionAction kind found" << endl;
            return false;
    }

    return true;
}

    };// namespace detail
  };// namespace solver
};// namespace zypp