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Diffstat (limited to 'src/xmlpatterns/data/qcomparisonfactory.cpp')
| -rw-r--r-- | src/xmlpatterns/data/qcomparisonfactory.cpp | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/src/xmlpatterns/data/qcomparisonfactory.cpp b/src/xmlpatterns/data/qcomparisonfactory.cpp new file mode 100644 index 0000000..66d72af --- /dev/null +++ b/src/xmlpatterns/data/qcomparisonfactory.cpp @@ -0,0 +1,154 @@ +/**************************************************************************** +** +** Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (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 Technology Preview License Agreement accompanying +** this package. +** +** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** If you have questions regarding the use of this file, please contact +** Nokia at qt-info@nokia.com. +** +** +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qatomiccomparators_p.h" +#include "qatomicstring_p.h" +#include "qcomparisonplatform_p.h" +#include "qvaluefactory_p.h" + +#include "qcomparisonfactory_p.h" + +QT_BEGIN_NAMESPACE + +using namespace QPatternist; + +/** + * @short Helper class for ComparisonFactory::fromLexical() which exposes + * CastingPlatform appropriately. + * + * @relates ComparisonFactory + */ +class PerformComparison : public ComparisonPlatform<PerformComparison, true> + , public SourceLocationReflection +{ +public: + PerformComparison(const SourceLocationReflection *const sourceLocationReflection, + const AtomicComparator::Operator op) : m_sourceReflection(sourceLocationReflection) + , m_operator(op) + { + Q_ASSERT(m_sourceReflection); + } + + bool operator()(const AtomicValue::Ptr &operand1, + const AtomicValue::Ptr &operand2, + const SchemaType::Ptr &type, + const ReportContext::Ptr &context) + { + const ItemType::Ptr asItemType((AtomicType::Ptr(type))); + + /* One area where the Query Transform world differs from the Schema + * world is that @c xs:duration is not considedered comparable, because + * it's according to Schema is partially comparable. This means + * ComparisonPlatform::fetchComparator() flags it as impossible, and + * hence we need to override that. + * + * SchemaType::wxsTypeMatches() will return true for sub-types of @c + * xs:duration as well, but that's ok since AbstractDurationComparator + * works for them too. */ + if(BuiltinTypes::xsDuration->wxsTypeMatches(type)) + prepareComparison(AtomicComparator::Ptr(new AbstractDurationComparator())); + else if (BuiltinTypes::xsGYear->wxsTypeMatches(type) || + BuiltinTypes::xsGYearMonth->wxsTypeMatches(type) || + BuiltinTypes::xsGMonth->wxsTypeMatches(type) || + BuiltinTypes::xsGMonthDay->wxsTypeMatches(type) || + BuiltinTypes::xsGDay->wxsTypeMatches(type)) + prepareComparison(AtomicComparator::Ptr(new AbstractDateTimeComparator())); + else + prepareComparison(fetchComparator(asItemType, asItemType, context)); + + return flexibleCompare(operand1, operand2, context); + } + + const SourceLocationReflection *actualReflection() const + { + return m_sourceReflection; + } + + AtomicComparator::Operator operatorID() const + { + return m_operator; + } + +private: + const SourceLocationReflection *const m_sourceReflection; + const AtomicComparator::Operator m_operator; +}; + +bool ComparisonFactory::compare(const AtomicValue::Ptr &operand1, + const AtomicComparator::Operator op, + const AtomicValue::Ptr &operand2, + const SchemaType::Ptr &type, + const ReportContext::Ptr &context, + const SourceLocationReflection *const sourceLocationReflection) +{ + Q_ASSERT(operand1); + Q_ASSERT(operand2); + Q_ASSERT(context); + Q_ASSERT(sourceLocationReflection); + Q_ASSERT(type); + Q_ASSERT_X(type->category() == SchemaType::SimpleTypeAtomic, Q_FUNC_INFO, + "We can only compare atomic values."); + + return PerformComparison(sourceLocationReflection, op)(operand1, operand2, type, context); +} + +bool ComparisonFactory::constructAndCompare(const DerivedString<TypeString>::Ptr &operand1, + const AtomicComparator::Operator op, + const DerivedString<TypeString>::Ptr &operand2, + const SchemaType::Ptr &type, + const ReportContext::Ptr &context, + const SourceLocationReflection *const sourceLocationReflection) +{ + Q_ASSERT(operand1); + Q_ASSERT(operand2); + Q_ASSERT(context); + Q_ASSERT(sourceLocationReflection); + Q_ASSERT(type); + Q_ASSERT_X(type->category() == SchemaType::SimpleTypeAtomic, Q_FUNC_INFO, + "We can only compare atomic values."); + + const AtomicValue::Ptr value1 = ValueFactory::fromLexical(operand1->stringValue(), type, context, sourceLocationReflection); + const AtomicValue::Ptr value2 = ValueFactory::fromLexical(operand2->stringValue(), type, context, sourceLocationReflection); + + return compare(value1, op, value2, type, context, sourceLocationReflection); +} + +QT_END_NAMESPACE |