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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** 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.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
/**
* @file
* @short This file is included by qcomparisonplatform_p.h.
* If you need includes in this file, put them in qcomparisonplatform_p.h, outside of the namespace.
*/
template <typename TSubClass, bool issueError,
AtomicComparator::ComparisonType comparisonType, ReportContext::ErrorCode errorCode>
bool ComparisonPlatform<TSubClass, issueError, comparisonType, errorCode>::
flexibleCompare(const Item &it1,
const Item &it2,
const DynamicContext::Ptr &context) const
{
if(m_comparator)
/* The comparator was located at compile time. */
return compare(it1, it2, m_comparator, operatorID());
else
{
const AtomicComparator::Ptr cp(fetchComparator(it1.type(),
it2.type(),
context));
return cp ? compare(it1, it2, cp, operatorID()) : false;
}
}
template <typename TSubClass, bool issueError,
AtomicComparator::ComparisonType comparisonType, ReportContext::ErrorCode errorCode>
AtomicComparator::ComparisonResult
ComparisonPlatform<TSubClass, issueError, comparisonType, errorCode>::
detailedFlexibleCompare(const Item &it1,
const Item &it2,
const DynamicContext::Ptr &context) const
{
AtomicComparator::Ptr comp;
if(m_comparator)
comp = m_comparator;
else
{
comp = fetchComparator(it1.type(),
it2.type(),
context);
}
Q_ASSERT_X(operatorID() == AtomicComparator::OperatorLessThanNaNLeast || operatorID() == AtomicComparator::OperatorLessThanNaNGreatest,
Q_FUNC_INFO, "Only OperatorLessThan is currently supported for this function.");
return comp->compare(it1, operatorID(), it2);
}
template <typename TSubClass, bool issueError,
AtomicComparator::ComparisonType comparisonType, ReportContext::ErrorCode errorCode>
bool ComparisonPlatform<TSubClass, issueError, comparisonType, errorCode>::
compare(const Item &oand1,
const Item &oand2,
const AtomicComparator::Ptr &comp,
const AtomicComparator::Operator op) const
{
Q_ASSERT(oand1);
Q_ASSERT(oand2);
Q_ASSERT(comp);
switch(op)
{
case AtomicComparator::OperatorEqual:
return comp->equals(oand1, oand2);
case AtomicComparator::OperatorNotEqual:
return !comp->equals(oand1, oand2);
case AtomicComparator::OperatorLessThanNaNLeast:
case AtomicComparator::OperatorLessThanNaNGreatest:
/* Fallthrough. */
case AtomicComparator::OperatorLessThan:
return comp->compare(oand1, op, oand2) == AtomicComparator::LessThan;
case AtomicComparator::OperatorGreaterThan:
return comp->compare(oand1, op, oand2) == AtomicComparator::GreaterThan;
case AtomicComparator::OperatorLessOrEqual:
{
const AtomicComparator::ComparisonResult ret = comp->compare(oand1, op, oand2);
return ret == AtomicComparator::LessThan || ret == AtomicComparator::Equal;
}
case(AtomicComparator::OperatorGreaterOrEqual):
{
const AtomicComparator::ComparisonResult ret = comp->compare(oand1, op, oand2);
return ret == AtomicComparator::GreaterThan || ret == AtomicComparator::Equal;
}
}
/* GCC unbarfer, this line should never be reached. */
Q_ASSERT(false);
return false;
}
template <typename TSubClass, bool issueError,
AtomicComparator::ComparisonType comparisonType, ReportContext::ErrorCode errorCode>
AtomicComparator::Ptr ComparisonPlatform<TSubClass, issueError, comparisonType, errorCode>::
fetchComparator(const ItemType::Ptr &t1,
const ItemType::Ptr &t2,
const ReportContext::Ptr &context) const
{
Q_ASSERT(t1);
Q_ASSERT(t2);
if(*BuiltinTypes::xsAnyAtomicType == *t1 ||
*BuiltinTypes::xsAnyAtomicType == *t2 ||
*BuiltinTypes::item == *t1 ||
*BuiltinTypes::item == *t2 ||
*BuiltinTypes::numeric == *t1 ||
*BuiltinTypes::numeric == *t2 ||
*CommonSequenceTypes::Empty == *t1 ||
*CommonSequenceTypes::Empty == *t2)
{
/* The static type of(at least) one of the operands could not
* be narrowed further, so we do the operator
* lookup at runtime.
*/
return AtomicComparator::Ptr();
}
const AtomicComparatorLocator::Ptr locator
(static_cast<const AtomicType *>(t1.data())->comparatorLocator());
if(!locator)
{
if(issueError)
{
context->error(QtXmlPatterns::tr("No comparisons can be done involving the type %1.")
.arg(formatType(context->namePool(), t1)),
errorCode, static_cast<const TSubClass *>(this)->actualReflection());
}
return AtomicComparator::Ptr();
}
const AtomicComparator::Ptr comp(static_cast<const AtomicType *>(t2.data())->accept(locator, operatorID(),
static_cast<const TSubClass *>(this)->actualReflection()));
if(comp)
return comp;
else if(issueError)
{
context->error(QtXmlPatterns::tr("Operator %1 is not available between atomic values of type %2 and %3.")
.arg(formatKeyword(AtomicComparator::displayName(operatorID(),
comparisonType)),
formatType(context->namePool(), t1),
formatType(context->namePool(), t2)),
errorCode, static_cast<const TSubClass *>(this)->actualReflection());
}
return AtomicComparator::Ptr();
}
template <typename TSubClass, bool issueError,
AtomicComparator::ComparisonType comparisonType, ReportContext::ErrorCode errorCode>
void ComparisonPlatform<TSubClass, issueError, comparisonType, errorCode>::
prepareComparison(const AtomicComparator::Ptr &c)
{
m_comparator = c;
}
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