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/****************************************************************************
**
** Copyright (C) 2009 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_Atomizer_H
#define Patternist_Atomizer_H
#include "qitem_p.h"
#include "qsinglecontainer_p.h"
QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE
namespace QPatternist
{
/**
* @short Performs atomization. Effectively, it is an implementation
* of the <tt>fn:data()</tt> function.
*
* @see <a href="http://www.w3.org/TR/xpath-functions/#func-data">XQuery 1.0 and XPath
* 2.0 Functions and Operators, 2.4 fn:data</a>
* @see <a href="http://www.w3.org/TR/xpath20/#id-atomization">XML
* Path Language (XPath) 2.0, 2.4.2 Atomization</a>
* @author Frans Englich <frans.englich@nokia.com>
* @ingroup Patternist_expressions
*/
class Atomizer : public SingleContainer
{
public:
Atomizer(const Expression::Ptr &operand);
virtual Item evaluateSingleton(const DynamicContext::Ptr &) const;
virtual Item::Iterator::Ptr evaluateSequence(const DynamicContext::Ptr &) const;
virtual SequenceType::Ptr staticType() const;
virtual SequenceType::List expectedOperandTypes() const;
virtual const SourceLocationReflection *actualReflection() const;
/**
* Makes an early compression, by returning the result of
* the type checked operand, if the operand has the static type
* xs:anyAtomicType(no atomization needed).
*/
virtual Expression::Ptr typeCheck(const StaticContext::Ptr &context,
const SequenceType::Ptr &reqType);
inline Item::Iterator::Ptr mapToSequence(const Item &item,
const DynamicContext::Ptr &context) const;
virtual ExpressionVisitorResult::Ptr accept(const ExpressionVisitor::Ptr &visitor) const;
private:
typedef QExplicitlySharedDataPointer<const Atomizer> ConstPtr;
};
}
QT_END_NAMESPACE
QT_END_HEADER
#endif
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