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Diffstat (limited to 'src/xmlpatterns/expr/qoptimizerblocks_p.h')
| -rw-r--r-- | src/xmlpatterns/expr/qoptimizerblocks_p.h | 226 |
1 files changed, 226 insertions, 0 deletions
diff --git a/src/xmlpatterns/expr/qoptimizerblocks_p.h b/src/xmlpatterns/expr/qoptimizerblocks_p.h new file mode 100644 index 0000000000..123a65502b --- /dev/null +++ b/src/xmlpatterns/expr/qoptimizerblocks_p.h @@ -0,0 +1,226 @@ +/**************************************************************************** +** +** 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_OptimizerBlocks_H +#define Patternist_OptimizerBlocks_H + +#include "qatomiccomparator_p.h" +#include "qexpression_p.h" +#include "qoptimizerframework_p.h" + +QT_BEGIN_HEADER + +QT_BEGIN_NAMESPACE + +namespace QPatternist +{ + /** + * @short Identifies Expression instances by their Expression::id(). + * + * @author Frans englich <fenglich@trolltech.com> + * @ingroup Patternist_expressions + */ + class ByIDIdentifier : public ExpressionIdentifier + { + public: + ByIDIdentifier(const Expression::ID id); + virtual bool matches(const Expression::Ptr &expr) const; + private: + const Expression::ID m_id; + }; + + /** + * @short Identifies Expression instances based on their static type. + * + * BySequenceTypeIdentifier identifies Expression instances + * if their Expression::staticType() matches the requested one, + * regardless of whether the Expression is a particular one, such + * as AndExpression. + * + * For example, constructing a BySequenceTypeIdentifier while + * passing CommonSequenceTypes::EBV in its constructor will create + * a ExpressionIdentifier that returns @c true for a static type with + * item type <tt>xs:string</tt>, but returns @c false for a static type involving + * <tt>xs:date</tt>. + * + * @author Frans englich <fenglich@trolltech.com> + * @ingroup Patternist_expressions + */ + class BySequenceTypeIdentifier : public ExpressionIdentifier + { + public: + BySequenceTypeIdentifier(const SequenceType::Ptr &seqType); + + /** + * @returns @c true, if the static type of @p expr is matches + * the SequenceType passed in the BySequenceTypeIdentifier() + * constructor, otherwise @c false. + */ + virtual bool matches(const Expression::Ptr &expr) const; + + private: + const SequenceType::Ptr m_seqType; + }; + + /** + * @short Determines whether an Expression is a value or general comparison or both, + * with a certain operator. + * + * @author Frans englich <fenglich@trolltech.com> + * @ingroup Patternist_expressions + */ + class ComparisonIdentifier : public ExpressionIdentifier + { + public: + + /** + * @param comparatorHosts the possible parent that may have + * the operator. This may be Expression::IDGeneralComparison or + * Expression::IDValueComparison. The two values may also be OR'd, + * meaning any of them will do. + * + * @param op the operator that the comparator host must have. For example, + * if @p op is AtomicComparator::OperatorGreatorOrEqual this ComparisonIdentifier + * will match operator >= in the case of IDGeneralComparison and 'ge' in the + * case of IDValueComparison. + */ + ComparisonIdentifier(const QVector<Expression::ID> comparatorHosts, + const AtomicComparator::Operator op); + + /** + * @returns @c true, if @p expr is a ValueComparison with the operator + * passed in ComparisonIdentifier(). + */ + virtual bool matches(const Expression::Ptr &expr) const; + + private: + const QVector<Expression::ID> m_hosts; + const AtomicComparator::Operator m_op; + }; + + /** + * @short Matches numeric literals that are of type xs:integer and + * has a specific value. + * + * For example IntegerIdentifier(4) would match the former but + * not the latter operand in this expression: "4 + 5". + * + * @author Frans englich <fenglich@trolltech.com> + * @ingroup Patternist_expressions + */ + class IntegerIdentifier : public ExpressionIdentifier + { + public: + IntegerIdentifier(const xsInteger num); + virtual bool matches(const Expression::Ptr &expr) const; + + private: + const xsInteger m_num; + }; + + /** + * @short Matches boolean literals. + * + * For example BooleanIdentifier(true) would match the former but + * not the latter operand in this expression: "true() + false()". + * + * @author Frans englich <fenglich@trolltech.com> + * @ingroup Patternist_expressions + */ + class BooleanIdentifier : public ExpressionIdentifier + { + public: + BooleanIdentifier(const bool value); + virtual bool matches(const Expression::Ptr &expr) const; + + private: + const bool m_value; + }; + + /** + * @short Creates a particular Expression instance identified by an Expression::ID. + * + * For example, if ByIDCreator() is passed Expression::IDCountFN, create() + * will return CountFN instances. + * + * @author Frans englich <fenglich@trolltech.com> + * @ingroup Patternist_expressions + */ + class ByIDCreator : public ExpressionCreator + { + public: + /** + * Creates a ByIDCreator that creates expressions + * of the type that @p id identifies. + */ + ByIDCreator(const Expression::ID id); + virtual Expression::Ptr create(const Expression::List &operands, + const StaticContext::Ptr &context, + const SourceLocationReflection *const r) const; + + /** + * Creates an expression by id @p id with the arguments @p operands. + */ + static Expression::Ptr create(const Expression::ID id, + const Expression::List &operands, + const StaticContext::Ptr &context, + const SourceLocationReflection *const r); + + private: + const Expression::ID m_id; + }; +} + +QT_END_NAMESPACE + +QT_END_HEADER + +#endif |