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Diffstat (limited to 'src/xmlpatterns/iterators/qintersectiterator_p.h')
| -rw-r--r-- | src/xmlpatterns/iterators/qintersectiterator_p.h | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/src/xmlpatterns/iterators/qintersectiterator_p.h b/src/xmlpatterns/iterators/qintersectiterator_p.h new file mode 100644 index 0000000..c8ada57 --- /dev/null +++ b/src/xmlpatterns/iterators/qintersectiterator_p.h @@ -0,0 +1,107 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (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 qt-sales@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_IntersectIterator_H +#define Patternist_IntersectIterator_H + +#include "qitem_p.h" + +QT_BEGIN_HEADER + +QT_BEGIN_NAMESPACE + +namespace QPatternist +{ + /** + * @short Implements the @c intersect operator. That is, the computation + * of the intersection between two sequences of nodes. + * + * The @c intersect operator can be seen as logical @c AND of the two sets. + * + * @ingroup Patternist_iterators + */ + class IntersectIterator : public Item::Iterator + { + public: + /** + * It is assumed that @p it1 and @p it2 are in document order and + * without duplicates. + */ + IntersectIterator(const Item::Iterator::Ptr &it1, + const Item::Iterator::Ptr &it2); + + virtual Item next(); + virtual Item current() const; + virtual xsInteger position() const; + virtual Item::Iterator::Ptr copy() const; + + private: + inline Item closedExit() + { + m_position = -1; + m_current = Item(); + return Item(); + } + + const Item::Iterator::Ptr m_it1; + const Item::Iterator::Ptr m_it2; + Item m_current; + xsInteger m_position; + Item m_node1; + Item m_node2; + }; +} + +QT_END_NAMESPACE + +QT_END_HEADER + +#endif |