/**************************************************************************** | |
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** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). | |
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** This file is part of the QtXmlPatterns module of the Qt Toolkit. | |
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** rights. These rights are described in the Nokia Qt LGPL Exception | |
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** GNU General Public License Usage | |
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// | |
// 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 <frans.englich@nokia.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 |