/****************************************************************************+
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**+
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** Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies).+
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** All rights reserved.+
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** Contact: Nokia Corporation (qt-info@nokia.com)+
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**+
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** This file is part of the QtXmlPatterns module of the Qt Toolkit.+
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**+
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** $QT_BEGIN_LICENSE:LGPL$+
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** No Commercial Usage+
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** This file contains pre-release code and may not be distributed.+
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** You may use this file in accordance with the terms and conditions+
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** contained in the Technology Preview License Agreement accompanying+
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** this package.+
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**+
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** GNU Lesser General Public License Usage+
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** Alternatively, this file may be used under the terms of the GNU Lesser+
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** General Public License version 2.1 as published by the Free Software+
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** Foundation and appearing in the file LICENSE.LGPL included in the+
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** packaging of this file.  Please review the following information to+
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** ensure the GNU Lesser General Public License version 2.1 requirements+
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.+
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**+
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** In addition, as a special exception, Nokia gives you certain additional+
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** rights.  These rights are described in the Nokia Qt LGPL Exception+
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.+
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**+
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** If you have questions regarding the use of this file, please contact+
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** Nokia at qt-info@nokia.com.+
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**+
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**+
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** $QT_END_LICENSE$+
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**+
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****************************************************************************/+
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+
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#include "qatomiccomparators_p.h"+
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#include "qatomicstring_p.h"+
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#include "qcomparisonplatform_p.h"+
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#include "qvaluefactory_p.h"+
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+
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#include "qcomparisonfactory_p.h"+
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+
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QT_BEGIN_NAMESPACE+
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+
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using namespace QPatternist;+
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+
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/**+
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 * @short Helper class for ComparisonFactory::fromLexical() which exposes+
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 * CastingPlatform appropriately.+
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 *+
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 * @relates ComparisonFactory+
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 */+
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class PerformComparison : public ComparisonPlatform<PerformComparison, true>+
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                        , public SourceLocationReflection+
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{+
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public:+
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    PerformComparison(const SourceLocationReflection *const sourceLocationReflection,+
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                      const AtomicComparator::Operator op) : m_sourceReflection(sourceLocationReflection)+
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                                                           , m_operator(op)+
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    {+
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        Q_ASSERT(m_sourceReflection);+
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    }+
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+
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    bool operator()(const AtomicValue::Ptr &operand1,+
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                    const AtomicValue::Ptr &operand2,+
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                    const SchemaType::Ptr &type,+
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                    const ReportContext::Ptr &context)+
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    {+
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        const ItemType::Ptr asItemType((AtomicType::Ptr(type)));+
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+
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        /* One area where the Query Transform world differs from the Schema+
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         * world is that @c xs:duration is not considedered comparable, because+
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         * it's according to Schema is partially comparable. This means+
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         * ComparisonPlatform::fetchComparator() flags it as impossible, and+
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         * hence we need to override that.+
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         *+
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         * SchemaType::wxsTypeMatches() will return true for sub-types of @c+
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         * xs:duration as well, but that's ok since AbstractDurationComparator+
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         * works for them too. */+
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        if(BuiltinTypes::xsDuration->wxsTypeMatches(type))+
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            prepareComparison(AtomicComparator::Ptr(new AbstractDurationComparator()));+
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        else if (BuiltinTypes::xsGYear->wxsTypeMatches(type) ||+
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                 BuiltinTypes::xsGYearMonth->wxsTypeMatches(type) ||+
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                 BuiltinTypes::xsGMonth->wxsTypeMatches(type) ||+
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                 BuiltinTypes::xsGMonthDay->wxsTypeMatches(type) ||+
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                 BuiltinTypes::xsGDay->wxsTypeMatches(type))+
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            prepareComparison(AtomicComparator::Ptr(new AbstractDateTimeComparator()));+
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        else+
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            prepareComparison(fetchComparator(asItemType, asItemType, context));+
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+
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        return flexibleCompare(operand1, operand2, context);+
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    }+
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+
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    const SourceLocationReflection *actualReflection() const+
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    {+
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        return m_sourceReflection;+
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    }+
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+
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    AtomicComparator::Operator operatorID() const+
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    {+
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        return m_operator;+
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    }+
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+
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private:+
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    const SourceLocationReflection *const m_sourceReflection;+
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    const AtomicComparator::Operator      m_operator;+
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};+
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+
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bool ComparisonFactory::compare(const AtomicValue::Ptr &operand1,+
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                                const AtomicComparator::Operator op,+
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                                const AtomicValue::Ptr &operand2,+
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                                const SchemaType::Ptr &type,+
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                                const ReportContext::Ptr &context,+
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                                const SourceLocationReflection *const sourceLocationReflection)+
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{+
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    Q_ASSERT(operand1);+
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    Q_ASSERT(operand2);+
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    Q_ASSERT(context);+
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    Q_ASSERT(sourceLocationReflection);+
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    Q_ASSERT(type);+
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    Q_ASSERT_X(type->category() == SchemaType::SimpleTypeAtomic, Q_FUNC_INFO,+
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               "We can only compare atomic values.");+
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+
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    return PerformComparison(sourceLocationReflection, op)(operand1, operand2, type, context);+
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}+
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+
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bool ComparisonFactory::constructAndCompare(const DerivedString<TypeString>::Ptr &operand1,+
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                                            const AtomicComparator::Operator op,+
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                                            const DerivedString<TypeString>::Ptr &operand2,+
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                                            const SchemaType::Ptr &type,+
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                                            const ReportContext::Ptr &context,+
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                                            const SourceLocationReflection *const sourceLocationReflection)+
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{+
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    Q_ASSERT(operand1);+
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    Q_ASSERT(operand2);+
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    Q_ASSERT(context);+
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    Q_ASSERT(sourceLocationReflection);+
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    Q_ASSERT(type);+
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    Q_ASSERT_X(type->category() == SchemaType::SimpleTypeAtomic, Q_FUNC_INFO,+
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               "We can only compare atomic values.");+
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+
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    const AtomicValue::Ptr value1 = ValueFactory::fromLexical(operand1->stringValue(), type, context, sourceLocationReflection);+
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    const AtomicValue::Ptr value2 = ValueFactory::fromLexical(operand2->stringValue(), type, context, sourceLocationReflection);+
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+
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    return compare(value1, op, value2, type, context, sourceLocationReflection);+
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}+
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+
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QT_END_NAMESPACE+
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