/*************************************************************************
 *
 *  OpenOffice.org - a multi-platform office productivity suite
 *
 *  $RCSfile: macabcondition.cxx,v $
 *
 *  $Revision: 1.2 $
 *
 *  last change: $Author: ihi $ $Date: 2007-09-13 17:56:18 $
 *
 *  The Contents of this file are made available subject to
 *  the terms of GNU Lesser General Public License Version 2.1.
 *
 *
 *    GNU Lesser General Public License Version 2.1
 *    =============================================
 *    Copyright 2005 by Sun Microsystems, Inc.
 *    901 San Antonio Road, Palo Alto, CA 94303, USA
 *
 *    This library is free software; you can redistribute it and/or
 *    modify it under the terms of the GNU Lesser General Public
 *    License version 2.1, as published by the Free Software Foundation.
 *
 *    This library 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
 *    Lesser General Public License for more details.
 *
 *    You should have received a copy of the GNU Lesser General Public
 *    License along with this library; if not, write to the Free Software
 *    Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 *    MA  02111-1307  USA
 *
 ************************************************************************/

// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_connectivity.hxx"

#include "macabcondition.hxx"

#ifndef _CONNECTIVITY_MACAB_HEADER_HXX_
#include "MacabHeader.hxx"
#endif

#ifndef _CONNECTIVITY_MACAB_RECORD_HXX_
#include "MacabRecord.hxx"
#endif

#ifndef _CONNECTIVITY_COMMONTOOLS_HXX_
#include "connectivity/CommonTools.hxx"
#endif

using namespace ::connectivity::macab;
using namespace ::com::sun::star::sdbc;
// -----------------------------------------------------------------------------
MacabCondition::~MacabCondition()
{
}
// -----------------------------------------------------------------------------
MacabConditionConstant::MacabConditionConstant(const sal_Bool bValue)
    : MacabCondition(),
      m_bValue(bValue)
{
}
// -----------------------------------------------------------------------------
sal_Bool MacabConditionConstant::isAlwaysTrue() const
{
    return m_bValue;
}
// -----------------------------------------------------------------------------
sal_Bool MacabConditionConstant::isAlwaysFalse() const
{
    return !m_bValue;
}
// -----------------------------------------------------------------------------
sal_Bool MacabConditionConstant::eval(const MacabRecord *) const
{
    return m_bValue;
}
// -----------------------------------------------------------------------------
MacabConditionColumn::MacabConditionColumn(const MacabHeader *header, const ::rtl::OUString &sColumnName) throw(SQLException)
    : MacabCondition(),
      m_nFieldNumber(header->getColumnNumber(sColumnName))
{
}
// -----------------------------------------------------------------------------
sal_Bool MacabConditionColumn::isAlwaysTrue() const
{
    // Sometimes true, sometimes false
    return sal_False;
}
// -----------------------------------------------------------------------------
sal_Bool MacabConditionColumn::isAlwaysFalse() const
{
    // Sometimes true, sometimes false
    return sal_False;
}
// -----------------------------------------------------------------------------
MacabConditionNull::MacabConditionNull(const MacabHeader *header, const ::rtl::OUString &sColumnName) throw(SQLException)
    : MacabConditionColumn(header, sColumnName)
{
}
// -----------------------------------------------------------------------------
sal_Bool MacabConditionNull::eval(const MacabRecord *aRecord) const
{
    macabfield *aValue = aRecord->get(m_nFieldNumber);

    if(aValue == NULL)
        return sal_True;
    else if(aValue->value == NULL)
        return sal_True;
    else
        return sal_False;
}
// -----------------------------------------------------------------------------
MacabConditionNotNull::MacabConditionNotNull(const MacabHeader *header, const ::rtl::OUString &sColumnName) throw(SQLException)
    : MacabConditionColumn(header, sColumnName)
{
}
// -----------------------------------------------------------------------------
sal_Bool MacabConditionNotNull::eval(const MacabRecord *aRecord) const
{
    macabfield *aValue = aRecord->get(m_nFieldNumber);

    if(aValue == NULL)
        return sal_False;
    else if(aValue->value == NULL)
        return sal_False;
    else
        return sal_True;
}
// -----------------------------------------------------------------------------
MacabConditionCompare::MacabConditionCompare(const MacabHeader *header, const ::rtl::OUString &sColumnName, const ::rtl::OUString &sMatchString) throw(SQLException)
    : MacabConditionColumn(header, sColumnName),
      m_sMatchString(sMatchString)
{
}
// -----------------------------------------------------------------------------
MacabConditionEqual::MacabConditionEqual(const MacabHeader *header, const ::rtl::OUString &sColumnName, const ::rtl::OUString &sMatchString) throw(SQLException)
    : MacabConditionCompare(header, sColumnName, sMatchString)
{
}
// -----------------------------------------------------------------------------
sal_Bool MacabConditionEqual::eval(const MacabRecord *aRecord) const
{
    macabfield *aValue = aRecord->get(m_nFieldNumber);

    if(aValue == NULL)
        return sal_False;

    macabfield *aValue2 = MacabRecord::createMacabField(m_sMatchString,aValue->type);

    if(aValue2 == NULL)
        return sal_False;

    sal_Int32 nReturn = MacabRecord::compareFields(aValue, aValue2);

    delete aValue2;
    return nReturn == 0;
}
// -----------------------------------------------------------------------------
MacabConditionDifferent::MacabConditionDifferent(const MacabHeader *header, const ::rtl::OUString &sColumnName, const ::rtl::OUString &sMatchString) throw(SQLException)
    : MacabConditionCompare(header, sColumnName, sMatchString)
{
}
// -----------------------------------------------------------------------------
sal_Bool MacabConditionDifferent::eval(const MacabRecord *aRecord) const
{
    macabfield *aValue = aRecord->get(m_nFieldNumber);

    if(aValue == NULL)
        return sal_False;

    macabfield *aValue2 = MacabRecord::createMacabField(m_sMatchString,aValue->type);

    if(aValue2 == NULL)
        return sal_False;

    sal_Int32 nReturn = MacabRecord::compareFields(aValue, aValue2);

    delete aValue2;
    return nReturn != 0;
}
// -----------------------------------------------------------------------------
MacabConditionSimilar::MacabConditionSimilar(const MacabHeader *header, const ::rtl::OUString &sColumnName, const ::rtl::OUString &sMatchString) throw(SQLException)
    : MacabConditionCompare(header, sColumnName, sMatchString)
{
}
// -----------------------------------------------------------------------------
sal_Bool MacabConditionSimilar::eval(const MacabRecord *aRecord) const
{
    macabfield *aValue = aRecord->get(m_nFieldNumber);

    if(aValue == NULL)
        return sal_False;

    ::rtl::OUString sName = MacabRecord::fieldToString(aValue);

    return match(m_sMatchString, sName, '\0');
}
// -----------------------------------------------------------------------------
MacabConditionBoolean::MacabConditionBoolean(MacabCondition *pLeft, MacabCondition *pRight)
    : MacabCondition(),
      m_pLeft(pLeft),
      m_pRight(pRight)
{
}
// -----------------------------------------------------------------------------
MacabConditionBoolean::~MacabConditionBoolean()
{
    delete m_pLeft;
    delete m_pRight;
}
// -----------------------------------------------------------------------------
MacabConditionOr::MacabConditionOr(MacabCondition *pLeft, MacabCondition *pRight)
    : MacabConditionBoolean(pLeft, pRight)
{
}
// -----------------------------------------------------------------------------
sal_Bool MacabConditionOr::isAlwaysTrue() const
{
    return m_pLeft->isAlwaysTrue() || m_pRight->isAlwaysTrue();
}
// -----------------------------------------------------------------------------
sal_Bool MacabConditionOr::isAlwaysFalse() const
{
    return m_pLeft->isAlwaysFalse() && m_pRight->isAlwaysFalse();
}
// -----------------------------------------------------------------------------
sal_Bool MacabConditionOr::eval(const MacabRecord *aRecord) const
{
    // We avoid evaluating terms as much as we can
    if (m_pLeft->isAlwaysTrue() || m_pRight->isAlwaysTrue()) return sal_True;
    if (m_pLeft->isAlwaysFalse() && m_pRight->isAlwaysFalse()) return sal_False;

    if (m_pLeft->eval(aRecord)) return sal_True;
    if (m_pRight->eval(aRecord)) return sal_True;

    return sal_False;
}
// -----------------------------------------------------------------------------
MacabConditionAnd::MacabConditionAnd(MacabCondition *pLeft, MacabCondition *pRight)
    : MacabConditionBoolean(pLeft, pRight)
{
}
// -----------------------------------------------------------------------------
sal_Bool MacabConditionAnd::isAlwaysTrue() const
{
    return m_pLeft->isAlwaysTrue() && m_pRight->isAlwaysTrue();
}
// -----------------------------------------------------------------------------
sal_Bool MacabConditionAnd::isAlwaysFalse() const
{
    return m_pLeft->isAlwaysFalse() || m_pRight->isAlwaysFalse();
}
// -----------------------------------------------------------------------------
sal_Bool MacabConditionAnd::eval(const MacabRecord *aRecord) const
{
    // We avoid evaluating terms as much as we can
    if (m_pLeft->isAlwaysFalse() || m_pRight->isAlwaysFalse()) return sal_False;
    if (m_pLeft->isAlwaysTrue() && m_pRight->isAlwaysTrue()) return sal_True;

    if (!m_pLeft->eval(aRecord)) return sal_False;
    if (!m_pRight->eval(aRecord)) return sal_False;

    return sal_True;
}