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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 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 http://www.qtsoftware.com/contact.
** $QT_END_LICENSE$
**
****************************************************************************/
/**
* @file qcomparingaggregator.cpp
* @short This file is included by qcomparingaggregator_p.h.
* If you need includes in this file, put them in qcomparingaggregator_p.h, outside of the namespace.
*/
template <AtomicComparator::Operator oper, AtomicComparator::ComparisonResult result>
inline Item
ComparingAggregator<oper, result>::applyNumericPromotion(const Item &old,
const Item &nev,
const Item &newVal) const
{
Q_ASSERT(old);
Q_ASSERT(nev);
Q_ASSERT(newVal);
const ItemType::Ptr to(old.type());
const ItemType::Ptr tn(nev.type());
if(!(BuiltinTypes::numeric->xdtTypeMatches(to) && BuiltinTypes::numeric->xdtTypeMatches(tn)))
return newVal; /* At least one of them isn't numeric. */
else if(BuiltinTypes::xsDouble->xdtTypeMatches(to) || BuiltinTypes::xsDouble->xdtTypeMatches(tn))
return toItem(Double::fromValue(newVal.as<Numeric>()->toDouble()));
else if(BuiltinTypes::xsFloat->xdtTypeMatches(to) || BuiltinTypes::xsFloat->xdtTypeMatches(tn))
return toItem(Float::fromValue(newVal.as<Numeric>()->toDouble()));
else if(BuiltinTypes::xsInteger->xdtTypeMatches(to) &&
BuiltinTypes::xsInteger->xdtTypeMatches(tn))
return newVal; /* Both must be xs:integer. */
else
return toItem(Decimal::fromValue(newVal.as<Numeric>()->toDecimal()));
}
template <AtomicComparator::Operator oper, AtomicComparator::ComparisonResult result>
Item
ComparingAggregator<oper, result>::evaluateSingleton(const DynamicContext::Ptr &context) const
{
const Item::Iterator::Ptr it(m_operands.first()->evaluateSequence(context));
Item largest;
while(true)
{
Item next(it->next());
if(!next)
{
return largest;
}
AtomicComparator::Ptr comp(comparator());
if(!comp)
{
ItemType::Ptr t1(next.type());
Q_ASSERT(t1);
if(BuiltinTypes::xsUntypedAtomic->xdtTypeMatches(t1))
{
next = cast(next, context);
t1 = BuiltinTypes::xsDouble;
}
if(!largest)
{
largest = next;
continue;
}
Q_ASSERT(largest);
comp = fetchComparator(largest.type(), t1, context);
Q_ASSERT(comp);
}
else if(!largest)
{
largest = next;
continue;
}
if(comp->compare(next, operatorID(), largest) == result)
{
largest = applyNumericPromotion(largest, next, next);
continue;
}
const ItemType::Ptr t(next.type());
if(BuiltinTypes::xsDouble->xdtTypeMatches(t) &&
next.as<Numeric>()->isNaN())
{
return CommonValues::DoubleNaN;
}
else if(BuiltinTypes::xsFloat->xdtTypeMatches(t) &&
next.as<Numeric>()->isNaN())
{
if(BuiltinTypes::xsDouble->xdtTypeMatches(largest.type()))
return CommonValues::DoubleNaN;
/* If we have a xs:double somewhere, we must promote the NaN value to xs:double,
* and we really should raise error on invalid value. */
largest = it->next();
while(largest)
{
const ItemType::Ptr tf(largest.type());
if(BuiltinTypes::xsDouble->xdtTypeMatches(tf))
return CommonValues::DoubleNaN;
else if(BuiltinTypes::xsUntypedAtomic->xdtTypeMatches(tf))
{
/* Attempt a convert, which will raise an error if it doesn't work out. */
cast(largest, context);
return CommonValues::DoubleNaN;
}
else if(!BuiltinTypes::numeric->xdtTypeMatches(tf))
{
fetchComparator(BuiltinTypes::xsFloat, tf, context);
}
else
largest = it->next();
};
return CommonValues::FloatNaN;
}
else
largest = applyNumericPromotion(largest, next, largest);
}
}
template <AtomicComparator::Operator oper, AtomicComparator::ComparisonResult result>
Expression::Ptr
ComparingAggregator<oper, result>::typeCheck(const StaticContext::Ptr &context,
const SequenceType::Ptr &reqType)
{
Q_ASSERT(oper == AtomicComparator::OperatorGreaterThan ||
oper == AtomicComparator::OperatorLessThan);
const Expression::Ptr me(FunctionCall::typeCheck(context, reqType));
ItemType::Ptr t1(m_operands.first()->staticType()->itemType());
if(*CommonSequenceTypes::Empty == *t1)
return EmptySequence::create(this, context);
else if(*BuiltinTypes::xsAnyAtomicType == *t1 ||
BuiltinTypes::numeric->xdtTypeMatches(t1))
return me;
else if(BuiltinTypes::xsUntypedAtomic->xdtTypeMatches(t1))
{
m_operands.replace(0, Expression::Ptr(new UntypedAtomicConverter(m_operands.first(),
BuiltinTypes::xsDouble)));
t1 = m_operands.first()->staticType()->itemType();
}
else if(!BuiltinTypes::xsString->xdtTypeMatches(t1) &&
!BuiltinTypes::xsAnyURI->xdtTypeMatches(t1) &&
!BuiltinTypes::xsDayTimeDuration->xdtTypeMatches(t1) &&
!BuiltinTypes::xsDate->xdtTypeMatches(t1) &&
!BuiltinTypes::xsTime->xdtTypeMatches(t1) &&
!BuiltinTypes::xsDateTime->xdtTypeMatches(t1) &&
!BuiltinTypes::xsYearMonthDuration->xdtTypeMatches(t1))
{
context->error(QtXmlPatterns::tr("The first argument to %1 cannot be of type %2.")
.arg(formatFunction(context->namePool(), signature()))
.arg(formatType(context->namePool(), m_operands.first()->staticType())),
ReportContext::FORG0006, this);
return me;
}
if(!m_operands.first()->staticType()->cardinality().allowsMany())
return m_operands.first();
prepareComparison(fetchComparator(t1, t1, context));
return me;
}
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