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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 <private/qitem_p.h> |
| #include <private/qatomiccomparator_p.h> |
| #include <private/qcomparisonplatform_p.h> |
| #include <private/qdynamiccontext_p.h> |
| #include <private/qexpression_p.h> |
| |
| 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 |
| |
| #endif |