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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtXmlPatterns module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, 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.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
#ifndef Patternist_ComparingAggregator_H
#define Patternist_ComparingAggregator_H
/**
* @file qcomparingaggregator_p.h
* @short Contains the implementations for the functions <tt>fn:max()</tt>, MaxFN,
* and <tt>fn:min()</tt>, MinFN, and the class ComparingAggregator.
*/
#include "qabstractfloat_p.h"
#include "qdecimal_p.h"
#include "qcastingplatform_p.h"
#include "qcomparisonplatform_p.h"
#include "qliteral_p.h"
#include "qaggregator_p.h"
#include "quntypedatomicconverter_p.h"
#include "qpatternistlocale_p.h"
QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE
namespace QPatternist
{
/**
* @short Base class for the implementations of the <tt>fn:min()</tt> and <tt>fn:max()</tt> function.
*
* What function that more specifically is
* followed, depends on how the constructor is called.
*
* @see MaxFN
* @see MinFN
* @ingroup Patternist_functions
* @author Frans Englich <frans.englich@nokia.com>
*/
template <AtomicComparator::Operator oper, AtomicComparator::ComparisonResult result>
class ComparingAggregator : public Aggregator,
public ComparisonPlatform<ComparingAggregator<oper, result>,
true, AtomicComparator::AsValueComparison,
ReportContext::FORG0006>,
public CastingPlatform<ComparingAggregator<oper, result>, true>
{
public:
virtual Item evaluateSingleton(const DynamicContext::Ptr &context) const;
virtual Expression::Ptr typeCheck(const StaticContext::Ptr &context,
const SequenceType::Ptr &reqType);
inline AtomicComparator::Operator operatorID() const
{
return oper;
}
inline ItemType::Ptr targetType() const
{
return BuiltinTypes::xsDouble;
}
private:
inline Item applyNumericPromotion(const Item &old,
const Item &nev,
const Item &newVal) const;
using ComparisonPlatform<ComparingAggregator<oper, result>,
true,
AtomicComparator::AsValueComparison,
ReportContext::FORG0006>::comparator;
using ComparisonPlatform<ComparingAggregator<oper, result>,
true,
AtomicComparator::AsValueComparison,
ReportContext::FORG0006>::fetchComparator;
using CastingPlatform<ComparingAggregator<oper, result>, true>::cast;
};
#include "qcomparingaggregator.cpp"
/**
* @short An instantiation of ComparingAggregator suitable for <tt>fn:max()</tt>.
*
* @ingroup Patternist_functions
*/
typedef ComparingAggregator<AtomicComparator::OperatorGreaterThan, AtomicComparator::GreaterThan> MaxFN;
/**
* @short An instantiation of ComparingAggregator suitable for <tt>fn:max()</tt>.
*
* @ingroup Patternist_functions
*/
typedef ComparingAggregator<AtomicComparator::OperatorLessThan, AtomicComparator::LessThan> MinFN;
}
QT_END_NAMESPACE
QT_END_HEADER
#endif
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