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/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtXmlPatterns module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this
** file. Please review the following information to ensure the GNU Lesser
** General Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qcommonsequencetypes_p.h"
#include "qgenericsequencetype_p.h"
#include "qitemmappingiterator_p.h"
#include "qquantifiedexpression_p.h"
QT_BEGIN_NAMESPACE
using namespace QPatternist;
QuantifiedExpression::QuantifiedExpression(const VariableSlotID varSlot,
const Operator quantifier,
const Expression::Ptr &inClause,
const Expression::Ptr &testExpression)
: PairContainer(inClause, testExpression),
m_varSlot(varSlot),
m_quantifier(quantifier)
{
Q_ASSERT(quantifier == Some || quantifier == Every);
}
Item QuantifiedExpression::mapToItem(const Item &item,
const DynamicContext::Ptr &context) const
{
context->setRangeVariable(m_varSlot, item);
return item;
}
bool QuantifiedExpression::evaluateEBV(const DynamicContext::Ptr &context) const
{
const Item::Iterator::Ptr it(makeItemMappingIterator<Item>(ConstPtr(this),
m_operand1->evaluateSequence(context),
context));
Item item(it->next());
if(m_quantifier == Some)
{
while(item)
{
if(m_operand2->evaluateEBV(context))
return true;
else
item = it->next();
};
return false;
}
else
{
Q_ASSERT(m_quantifier == Every);
while(item)
{
if(m_operand2->evaluateEBV(context))
item = it->next();
else
return false;
}
return true;
}
}
QString QuantifiedExpression::displayName(const Operator quantifier)
{
if(quantifier == Some)
return QLatin1String("some");
else
{
Q_ASSERT(quantifier == Every);
return QLatin1String("every");
}
}
SequenceType::Ptr QuantifiedExpression::staticType() const
{
return CommonSequenceTypes::ExactlyOneBoolean;
}
SequenceType::List QuantifiedExpression::expectedOperandTypes() const
{
SequenceType::List result;
result.append(CommonSequenceTypes::ZeroOrMoreItems);
result.append(CommonSequenceTypes::EBV);
return result;
}
QuantifiedExpression::Operator QuantifiedExpression::operatorID() const
{
return m_quantifier;
}
ExpressionVisitorResult::Ptr QuantifiedExpression::accept(const ExpressionVisitor::Ptr &visitor) const
{
return visitor->visit(this);
}
QT_END_NAMESPACE
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