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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_StackContextBase_H
#define Patternist_StackContextBase_H
#include <QVector>
#include "qdaytimeduration_p.h"
#include "qdelegatingdynamiccontext_p.h"
#include "qexpression_p.h"
QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE
namespace QPatternist
{
/**
* @short Base class for all DynamicContext classes that needs to supply
* variables. It has a new frame for local caches, position iterators,
* expressions, range variables, template parameters but notably continues
* to delegate global caches.
*
* @author Frans Englich <frans.englich@nokia.com>
*/
template<typename TSuperClass>
class StackContextBase : public TSuperClass
{
public:
StackContextBase();
/**
* Construct a StackContextBase and passes @p prevContext to its super class. This
* constructor is typically used when the super class is DelegatingDynamicContext.
*/
StackContextBase(const DynamicContext::Ptr &prevContext);
virtual void setRangeVariable(const VariableSlotID slotNumber,
const Item &newValue);
virtual Item rangeVariable(const VariableSlotID slotNumber) const;
virtual void setExpressionVariable(const VariableSlotID slotNumber,
const Expression::Ptr &newValue);
virtual Expression::Ptr expressionVariable(const VariableSlotID slotNumber) const;
virtual Item::Iterator::Ptr positionIterator(const VariableSlotID slot) const;
virtual void setPositionIterator(const VariableSlotID slot,
const Item::Iterator::Ptr &newValue);
virtual ItemCacheCell &itemCacheCell(const VariableSlotID slot);
virtual ItemSequenceCacheCell::Vector &itemSequenceCacheCells(const VariableSlotID slot);
virtual DynamicContext::TemplateParameterHash &templateParameterStore();
protected:
/**
* This function is protected, although it only is used in this class. I don't
* know why it has to be, but it won't compile when private.
*/
template<typename VectorType, typename UnitType>
inline
void setSlotVariable(const VariableSlotID slot,
const UnitType &newValue,
VectorType &container) const;
private:
Item::Vector m_rangeVariables;
Expression::Vector m_expressionVariables;
Item::Iterator::Vector m_positionIterators;
ItemCacheCell::Vector m_itemCacheCells;
ItemSequenceCacheCell::Vector m_itemSequenceCacheCells;
DynamicContext::TemplateParameterHash m_templateParameterStore;
};
#include "qstackcontextbase.cpp"
/**
* @short A DynamicContext that creates a new scope for variables.
*
* This DynamicContext is used for recursive user function calls, for example.
*/
typedef StackContextBase<DelegatingDynamicContext> StackContext;
}
QT_END_NAMESPACE
QT_END_HEADER
#endif
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