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Diffstat (limited to 'src/xmlpatterns/janitors/qcardinalityverifier_p.h')
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diff --git a/src/xmlpatterns/janitors/qcardinalityverifier_p.h b/src/xmlpatterns/janitors/qcardinalityverifier_p.h new file mode 100644 index 0000000..c51f1e1 --- /dev/null +++ b/src/xmlpatterns/janitors/qcardinalityverifier_p.h @@ -0,0 +1,128 @@ +/**************************************************************************** +** +** 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_CardinalityVerifier_H +#define Patternist_CardinalityVerifier_H + +#include "qsinglecontainer_p.h" + +QT_BEGIN_HEADER + +QT_BEGIN_NAMESPACE + +namespace QPatternist +{ + + /** + * @short Verifies that the sequence an Expression evaluates to conforms to a Cardinality. + * + * @see <a href="http://www.w3.org/TR/xpath-functions/#cardinality-funcs">XQuery 1.0 and + * XPath 2.0 Functions and Operators, 15.2 Functions That Test the Cardinality of Sequences</a> + * @author Frans Englich <fenglich@trolltech.com> + * @ingroup Patternist_expressions + */ + class CardinalityVerifier : public SingleContainer + { + public: + CardinalityVerifier(const Expression::Ptr &operand, + const Cardinality &card, + const ReportContext::ErrorCode code); + + virtual Item::Iterator::Ptr evaluateSequence(const DynamicContext::Ptr &context) const; + virtual Item evaluateSingleton(const DynamicContext::Ptr &) const; + + virtual SequenceType::List expectedOperandTypes() const; + virtual SequenceType::Ptr staticType() const; + + virtual ExpressionVisitorResult::Ptr accept(const ExpressionVisitor::Ptr &visitor) const; + + /** + * If the static cardinality of the operand is within the required cardinality, + * the operand is returned as is, since results will always be valid and hence + * is not a CardinalityVerifier necessary. + */ + virtual Expression::Ptr compress(const StaticContext::Ptr &context); + + /** + * A utility function for determining whether the static type of an Expression matches + * a cardinality. More specifically, this function performs the cardinality verification + * part of the Function Conversion Rules. + * + * @todo Mention the rewrite and when exactly an error is issued via @p context + */ + static Expression::Ptr + verifyCardinality(const Expression::Ptr &operand, + const Cardinality &card, + const StaticContext::Ptr &context, + const ReportContext::ErrorCode code = ReportContext::XPTY0004); + + virtual const SourceLocationReflection *actualReflection() const; + + ID id() const; + private: + /** + * Centralizes a message string in order to increase consistency and + * reduce work for translators. + */ + static inline QString wrongCardinality(const Cardinality &req, + const Cardinality &got = Cardinality::empty()); + + const Cardinality m_reqCard; + const bool m_allowsMany; + const ReportContext::ErrorCode m_errorCode; + }; +} + +QT_END_NAMESPACE + +QT_END_HEADER + +#endif |