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Diffstat (limited to 'src/xmlpatterns/expr/qquantifiedexpression.cpp')
-rw-r--r-- | src/xmlpatterns/expr/qquantifiedexpression.cpp | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/src/xmlpatterns/expr/qquantifiedexpression.cpp b/src/xmlpatterns/expr/qquantifiedexpression.cpp new file mode 100644 index 0000000..d8037df --- /dev/null +++ b/src/xmlpatterns/expr/qquantifiedexpression.cpp @@ -0,0 +1,140 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (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 qt-sales@nokia.com. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qcommonsequencetypes_p.h" +#include "qgenericsequencetype_p.h" +#include "qitemmappingiterator_p.h" + +#include "qquantifiedexpression_p.h" + +QT_BEGIN_NAMESPACE + +using namespace QPatternist; + +QuantifiedExpression::QuantifiedExpression(const VariableSlotID varSlot, + const Operator quantifier, + const Expression::Ptr &inClause, + const Expression::Ptr &testExpression) + : PairContainer(inClause, testExpression), + m_varSlot(varSlot), + m_quantifier(quantifier) +{ + Q_ASSERT(quantifier == Some || quantifier == Every); +} + +Item QuantifiedExpression::mapToItem(const Item &item, + const DynamicContext::Ptr &context) const +{ + context->setRangeVariable(m_varSlot, item); + return item; +} + +bool QuantifiedExpression::evaluateEBV(const DynamicContext::Ptr &context) const +{ + const Item::Iterator::Ptr it(makeItemMappingIterator<Item>(ConstPtr(this), + m_operand1->evaluateSequence(context), + context)); + + Item item(it->next()); + + if(m_quantifier == Some) + { + while(item) + { + if(m_operand2->evaluateEBV(context)) + return true; + else + item = it->next(); + }; + + return false; + } + else + { + Q_ASSERT(m_quantifier == Every); + + while(item) + { + if(m_operand2->evaluateEBV(context)) + item = it->next(); + else + return false; + } + + return true; + } +} + +QString QuantifiedExpression::displayName(const Operator quantifier) +{ + if(quantifier == Some) + return QLatin1String("some"); + else + { + Q_ASSERT(quantifier == Every); + return QLatin1String("every"); + } +} + +SequenceType::Ptr QuantifiedExpression::staticType() const +{ + return CommonSequenceTypes::ExactlyOneBoolean; +} + +SequenceType::List QuantifiedExpression::expectedOperandTypes() const +{ + SequenceType::List result; + result.append(CommonSequenceTypes::ZeroOrMoreItems); + result.append(CommonSequenceTypes::EBV); + return result; +} + +QuantifiedExpression::Operator QuantifiedExpression::operatorID() const +{ + return m_quantifier; +} + +ExpressionVisitorResult::Ptr QuantifiedExpression::accept(const ExpressionVisitor::Ptr &visitor) const +{ + return visitor->visit(this); +} + +QT_END_NAMESPACE |