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Diffstat (limited to 'src/xmlpatterns/expr/qcombinenodes_p.h')
| -rw-r--r-- | src/xmlpatterns/expr/qcombinenodes_p.h | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/src/xmlpatterns/expr/qcombinenodes_p.h b/src/xmlpatterns/expr/qcombinenodes_p.h new file mode 100644 index 0000000..9d1dc87 --- /dev/null +++ b/src/xmlpatterns/expr/qcombinenodes_p.h @@ -0,0 +1,116 @@ +/**************************************************************************** +** +** 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_CombineNodes_H +#define Patternist_CombineNodes_H + +#include "qpaircontainer_p.h" + +QT_BEGIN_HEADER + +QT_BEGIN_NAMESPACE + +namespace QPatternist +{ + /** + * @short Implements XPath 2.0's operators for combining node sequences: @c union, + * @c intersect and @c except. + * + * @see <a href="http://www.w3.org/TR/xquery/#combining_seq">XQuery 1.0: An XML Query + * Language, 3.3.3 Combining QXmlNodeModelIndex Sequences</a> + * @author Frans Englich <fenglich@trolltech.com> + * @ingroup Patternist_expressions + */ + class Q_AUTOTEST_EXPORT CombineNodes : public PairContainer + { + public: + enum Operator + { + Union = 1, + Intersect = 2, + Except = 4 + }; + + CombineNodes(const Expression::Ptr &operand1, + const Operator op, + const Expression::Ptr &operand2); + + virtual Item::Iterator::Ptr evaluateSequence(const DynamicContext::Ptr &context) const; + virtual Item evaluateSingleton(const DynamicContext::Ptr &context) const; + virtual bool evaluateEBV(const DynamicContext::Ptr &context) const; + virtual SequenceType::Ptr staticType() const; + virtual SequenceType::List expectedOperandTypes() const; + virtual Expression::Ptr typeCheck(const StaticContext::Ptr &context, + const SequenceType::Ptr &reqType); + + Operator operatorID() const; + virtual ID id() const; + + /** + * Determines the string representation for operator @p op. + * + * @return "union" if @p op is Union, "intersect" if @p op + * is Intersect and "except" if @p op is Except. + */ + static QString displayName(const Operator op); + + virtual ExpressionVisitorResult::Ptr accept(const ExpressionVisitor::Ptr &visitor) const; + + private: + const Operator m_operator; + }; +} + +QT_END_NAMESPACE + +QT_END_HEADER + +#endif |