/**************************************************************************** | |
** | |
** 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. | |
** | |
** | |
** | |
** | |
** | |
** $QT_END_LICENSE$ | |
** | |
****************************************************************************/ | |
// | |
// 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_AtomicComparators_H | |
#define Patternist_AtomicComparators_H | |
#include "qabstractfloat_p.h" | |
#include "qatomiccomparator_p.h" | |
#include "qprimitives_p.h" | |
/** | |
* @file | |
* @short Contains all the classes implementing comparisons between atomic values. | |
*/ | |
QT_BEGIN_HEADER | |
QT_BEGIN_NAMESPACE | |
namespace QPatternist | |
{ | |
/** | |
* @short Performs case @em sensitive string comparison | |
* between @c xs:anyUri, @c xs:string, and @c xs:untypedAtomic. | |
* | |
* @ingroup Patternist_xdm | |
* @author Frans Englich <frans.englich@nokia.com> | |
*/ | |
class StringComparator : public AtomicComparator | |
{ | |
public: | |
/** | |
* Compares two strings, and returns the appropriate AtomicComparator::ComparisonResult enum. This | |
* is a bit simplified version of string comparison as defined in the XPath specifications, | |
* since this does not take any string collations into account(which an implementation neither | |
* is required to do). | |
* | |
* @see <a href="http://www.w3.org/TR/xpath-functions/#string-compare">XQuery 1.0 and XPath | |
* 2.0 Functions and Operators, 7.3 ValueComparison::Equality and Comparison of Strings</a> | |
*/ | |
virtual ComparisonResult compare(const Item &op1, | |
const AtomicComparator::Operator op, | |
const Item &op2) const; | |
/** | |
* Compares two strings, and returns @c true if they are considered equal as per | |
* an ordinary string comparison. In other words, this is an implementation with | |
* the Unicode code point collation. | |
* | |
* @see <a href="http://www.w3.org/TR/xpath-functions/#string-compare">XQuery 1.0 and XPath | |
* 2.0 Functions and Operators, 7.3 ValueComparison::Equality and Comparison of Strings</a> | |
*/ | |
virtual bool equals(const Item &op1, | |
const Item &op2) const; | |
}; | |
/** | |
* @short Performs case @em insensitive string comparison | |
* between @c xs:anyUri, @c xs:string, and @c xs:untypedAtomic. | |
* | |
* @ingroup Patternist_xdm | |
* @author Frans Englich <frans.englich@nokia.com> | |
*/ | |
class CaseInsensitiveStringComparator : public AtomicComparator | |
{ | |
public: | |
/** | |
* Converts both string values to upper case and afterwards compare them. | |
*/ | |
virtual ComparisonResult compare(const Item &op1, | |
const AtomicComparator::Operator op, | |
const Item &op2) const; | |
/** | |
* Converts both string values case insensitively. | |
*/ | |
virtual bool equals(const Item &op1, | |
const Item &op2) const; | |
}; | |
/** | |
* @short Compares @c xs:base64Binary and @c xs:hexBinary values. | |
* | |
* @author Frans Englich <frans.englich@nokia.com> | |
*/ | |
class BinaryDataComparator : public AtomicComparator | |
{ | |
public: | |
virtual bool equals(const Item &op1, | |
const Item &op2) const; | |
}; | |
/** | |
* @short Compares @c xs:boolean values. | |
* | |
* This is done via the object's Boolean::evaluteEBV() function. | |
* | |
* @author Frans Englich <frans.englich@nokia.com> | |
*/ | |
class BooleanComparator : public AtomicComparator | |
{ | |
public: | |
virtual ComparisonResult compare(const Item &op1, | |
const AtomicComparator::Operator op, | |
const Item &op2) const; | |
virtual bool equals(const Item &op1, | |
const Item &op2) const; | |
}; | |
/** | |
* @short Compares @c xs:double values. | |
* | |
* @todo Add docs about numeric promotion | |
* | |
* @author Frans Englich <frans.englich@nokia.com> | |
*/ | |
class AbstractFloatComparator : public AtomicComparator | |
{ | |
public: | |
virtual ComparisonResult compare(const Item &op1, | |
const AtomicComparator::Operator op, | |
const Item &op2) const; | |
virtual bool equals(const Item &op1, | |
const Item &op2) const; | |
}; | |
/** | |
* @short Compares @c xs:double values for the purpose of sorting. | |
* | |
* @todo Add docs about numeric promotion | |
* | |
* @author Frans Englich <frans.englich@nokia.com> | |
*/ | |
template<const AtomicComparator::Operator t_op> | |
class AbstractFloatSortComparator : public AbstractFloatComparator | |
{ | |
public: | |
virtual ComparisonResult compare(const Item &o1, | |
const AtomicComparator::Operator op, | |
const Item &o2) const | |
{ | |
Q_ASSERT_X(t_op == OperatorLessThanNaNLeast || t_op == OperatorLessThanNaNGreatest, Q_FUNC_INFO, | |
"Can only be instantiated with those two."); | |
Q_ASSERT(op == t_op); | |
Q_UNUSED(op); /* Needed when building in release mode. */ | |
const xsDouble v1 = o1.template as<Numeric>()->toDouble(); | |
const xsDouble v2 = o2.template as<Numeric>()->toDouble(); | |
if(qIsNaN(v1) && !qIsNaN(v2)) | |
return t_op == OperatorLessThanNaNLeast ? LessThan : GreaterThan; | |
if(!qIsNaN(v1) && qIsNaN(v2)) | |
return t_op == OperatorLessThanNaNLeast ? GreaterThan : LessThan; | |
if(Double::isEqual(v1, v2)) | |
return Equal; | |
else if(v1 < v2) | |
return LessThan; | |
else | |
return GreaterThan; | |
} | |
}; | |
/** | |
* @short Compares @c xs:decimal values. | |
* | |
* @author Frans Englich <frans.englich@nokia.com> | |
*/ | |
class DecimalComparator : public AtomicComparator | |
{ | |
public: | |
virtual ComparisonResult compare(const Item &op1, | |
const AtomicComparator::Operator op, | |
const Item &op2) const; | |
virtual bool equals(const Item &op1, | |
const Item &op2) const; | |
}; | |
/** | |
* @short Compares @c xs:integer values. | |
* | |
* @author Frans Englich <frans.englich@nokia.com> | |
*/ | |
class IntegerComparator : public AtomicComparator | |
{ | |
public: | |
virtual ComparisonResult compare(const Item &op1, | |
const AtomicComparator::Operator op, | |
const Item &op2) const; | |
virtual bool equals(const Item &op1, | |
const Item &op2) const; | |
}; | |
/** | |
* @short Compares @c xs:QName values. | |
* | |
* @author Frans Englich <frans.englich@nokia.com> | |
*/ | |
class QNameComparator : public AtomicComparator | |
{ | |
public: | |
virtual bool equals(const Item &op1, | |
const Item &op2) const; | |
}; | |
/** | |
* @short Compares sub-classes of AbstractDateTime. | |
* | |
* @author Frans Englich <frans.englich@nokia.com> | |
*/ | |
class AbstractDateTimeComparator : public AtomicComparator | |
{ | |
public: | |
virtual ComparisonResult compare(const Item &op1, | |
const AtomicComparator::Operator op, | |
const Item &op2) const; | |
virtual bool equals(const Item &op1, | |
const Item &op2) const; | |
}; | |
/** | |
* @short Compares sub-classes of AbstractDuration. | |
* | |
* @author Frans Englich <frans.englich@nokia.com> | |
*/ | |
class AbstractDurationComparator : public AtomicComparator | |
{ | |
public: | |
virtual ComparisonResult compare(const Item &op1, | |
const AtomicComparator::Operator op, | |
const Item &op2) const; | |
virtual bool equals(const Item &op1, | |
const Item &op2) const; | |
private: | |
static inline QDateTime addDurationToDateTime(const QDateTime &dateTime, | |
const AbstractDuration *const duration); | |
}; | |
} | |
QT_END_NAMESPACE | |
QT_END_HEADER | |
#endif |