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authorLars Knoll <lars.knoll@nokia.com>2009-03-23 09:18:55 (GMT)
committerSimon Hausmann <simon.hausmann@nokia.com>2009-03-23 09:18:55 (GMT)
commite5fcad302d86d316390c6b0f62759a067313e8a9 (patch)
treec2afbf6f1066b6ce261f14341cf6d310e5595bc1 /src/xmlpatterns/expr/qquantifiedexpression.cpp
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Long live Qt 4.5!
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+/****************************************************************************
+**
+** 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