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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.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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_UntypedAtomicConverter_H
#define Patternist_UntypedAtomicConverter_H
#include "qitem_p.h"
#include "qsinglecontainer_p.h"
#include "qcastingplatform_p.h"
QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE
namespace QPatternist
{
/**
* @short Casts every item in a sequence obtained from
* evaluating an Expression, to a requested atomic type.
*
* The atomic values it casts from are instances of xs:untypedAtomic(hence
* the name). Typically, the items are from an Atomizer. UntypedAtomicConverter
* implements the automatic conversion which typically is activated when XPath
* is handling untyped data.
*
* @see <a href="http://www.w3.org/TR/xpath20/#id-function-calls">XML Path
* Language (XPath) 2.0, 3.1.5 Function Calls, in particular the
* Function Conversion Rules</a>
* @author Frans Englich <frans.englich@nokia.com>
* @ingroup Patternist_expressions
*/
class UntypedAtomicConverter : public SingleContainer,
public CastingPlatform<UntypedAtomicConverter, true>
{
public:
UntypedAtomicConverter(const Expression::Ptr &operand,
const ItemType::Ptr &reqType,
const ReportContext::ErrorCode code = ReportContext::FORG0001);
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 ExpressionVisitorResult::Ptr accept(const ExpressionVisitor::Ptr &visitor) const;
/**
* Overridden to call CastingPlatform::typeCheck()
*/
virtual Expression::Ptr typeCheck(const StaticContext::Ptr &context,
const SequenceType::Ptr &reqType);
inline Item mapToItem(const Item &item,
const DynamicContext::Ptr &context) const;
inline ItemType::Ptr targetType() const
{
return m_reqType;
}
virtual const SourceLocationReflection *actualReflection() const;
private:
typedef QExplicitlySharedDataPointer<const UntypedAtomicConverter> ConstPtr;
const ItemType::Ptr m_reqType;
};
Item UntypedAtomicConverter::mapToItem(const Item &item, const DynamicContext::Ptr &context) const
{
return cast(item, context);
}
}
QT_END_NAMESPACE
QT_END_HEADER
#endif
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