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/****************************************************************************
**
** Copyright (C) 2010 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.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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_NodeFNs_H
#define Patternist_NodeFNs_H
#include "qfunctioncall_p.h"
#include "qcastingplatform_p.h"
/**
* @file
* @short Contains classes implementing the functions found in
* <a href="http://www.w3.org/TR/xpath-functions/#node-functions">XQuery 1.0 and
* XPath 2.0 Functions and Operators, 14 Functions and Operators on Nodes</a>.
*
* @ingroup Patternist_functions
*/
QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE
namespace QPatternist
{
/**
* @short Implements the function <tt>fn:name()</tt>.
*
* @ingroup Patternist_functions
* @author Frans Englich <frans.englich@nokia.com>
*/
class NameFN : public FunctionCall
{
public:
virtual Item evaluateSingleton(const DynamicContext::Ptr &context) const;
};
/**
* @short Implements the function <tt>fn:local-name()</tt>.
*
* @ingroup Patternist_functions
* @author Frans Englich <frans.englich@nokia.com>
*/
class LocalNameFN : public FunctionCall
{
public:
virtual Item evaluateSingleton(const DynamicContext::Ptr &context) const;
};
/**
* @short Implements the function <tt>fn:namespace-uri()</tt>.
*
* @ingroup Patternist_functions
* @author Frans Englich <frans.englich@nokia.com>
*/
class NamespaceURIFN : public FunctionCall
{
public:
virtual Item evaluateSingleton(const DynamicContext::Ptr &context) const;
};
/**
* @short Implements the function <tt>fn:number()</tt>.
*
* NumberFN uses CastingPlatform for performing the actual casting.
*
* @ingroup Patternist_functions
* @author Frans Englich <frans.englich@nokia.com>
*/
class NumberFN : public FunctionCall,
public CastingPlatform<NumberFN, false>
{
public:
virtual Item evaluateSingleton(const DynamicContext::Ptr &context) const;
/**
* Overridden in order to call CastingPlatform::prepareCasting(). It also
* implements the optimization of rewriting to its operand if its
* type is xs:double(since the <tt>fn:number()</tt> call is in that case superflorous).
*/
virtual Expression::Ptr typeCheck(const StaticContext::Ptr &context,
const SequenceType::Ptr &reqType);
/**
* @returns always BuiltinTypes::xsDouble.
*/
inline ItemType::Ptr targetType() const
{
return BuiltinTypes::xsDouble;
}
};
/**
* @short Implements the function <tt>fn:lang()</tt>.
*
* @ingroup Patternist_functions
* @author Frans Englich <frans.englich@nokia.com>
*/
class LangFN : public FunctionCall
{
public:
virtual Item evaluateSingleton(const DynamicContext::Ptr &context) const;
private:
static inline bool isLangMatch(const QString &candidate, const QString &toMatch);
};
/**
* @short Implements the function <tt>fn:root()</tt>.
*
* @ingroup Patternist_functions
* @author Frans Englich <frans.englich@nokia.com>
*/
class RootFN : public FunctionCall
{
public:
virtual Item evaluateSingleton(const DynamicContext::Ptr &context) const;
/**
* Infers its cardinality from the argument.
*/
virtual SequenceType::Ptr staticType() const;
};
}
QT_END_NAMESPACE
QT_END_HEADER
#endif
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