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/****************************************************************************
**
** 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
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