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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 either Technology Preview License Agreement or the
** Beta Release License Agreement.
**
** 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 1.0, 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.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at http://www.qtsoftware.com/contact.
** $QT_END_LICENSE$
**
****************************************************************************/
//
// 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_IndexOfIterator_H
#define Patternist_IndexOfIterator_H
#include "qitem_p.h"
#include "qatomiccomparator_p.h"
#include "qcomparisonplatform_p.h"
#include "qdynamiccontext_p.h"
#include "qexpression_p.h"
QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE
namespace QPatternist
{
/**
* @short Forms an QAbstractXmlForwardIterator over a sequence of integers, which each is the position
* of where a search parameter appeared in another QAbstractXmlForwardIterator.
*
* @see <a href="http://www.w3.org/TR/xpath-functions/#func-index-of">XQuery 1.0
* and XPath 2.0 Functions and Operators, 15.1.3 fn:index-of</a>
* @author Frans Englich <fenglich@trolltech.com>
* @ingroup Patternist_iterators
*/
class IndexOfIterator : public Item::Iterator
, public ComparisonPlatform<IndexOfIterator, false>
, public SourceLocationReflection
{
public:
/**
* Creates an IndexOfIterator, whose next() function returns integers being
* the index positions of where @p searchParam was found in @p inputSequence.
*
* @param comp the AtomicComparator to be used for comparing values. This may be @c null,
* meaning the IndexOfIterator iterator will dynamically determine what comparator to use
* on an item per item basis, which is slower.
* @param searchParam the item which should be compared to the items in @p inputSequence.
* @param inputSequence the input sequence which indexes of the @p searchParam should
* be returned for.
* @param context the usual DynamicContext
* @param expr the Expression that this IndexOfIterator is evaluating
* for. It is used for error reporting, via actualReflection().
*/
IndexOfIterator(const Item::Iterator::Ptr &inputSequence,
const Item &searchParam,
const AtomicComparator::Ptr &comp,
const DynamicContext::Ptr &context,
const Expression::ConstPtr &expr);
virtual Item next();
virtual Item current() const;
virtual xsInteger position() const;
virtual Item::Iterator::Ptr copy() const;
inline AtomicComparator::Operator operatorID() const
{
return AtomicComparator::OperatorEqual;
}
virtual const SourceLocationReflection *actualReflection() const;
private:
const Item::Iterator::Ptr m_seq;
const Item m_searchParam;
const DynamicContext::Ptr m_context;
const Expression::ConstPtr m_expr;
Item m_current;
xsInteger m_position;
xsInteger m_seqPos;
};
}
QT_END_NAMESPACE
QT_END_HEADER
#endif
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