/******************************************************************************** Copyright (C) 2009 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 "qboolean_p.h"#include "qcommonsequencetypes_p.h"#include "qcommonvalues_p.h"#include "qliteral_p.h"#include "qandexpression_p.h"QT_BEGIN_NAMESPACEusing namespace QPatternist;AndExpression::AndExpression(const Expression::Ptr &operand1, const Expression::Ptr &operand2) : PairContainer(operand1, operand2){}bool AndExpression::evaluateEBV(const DynamicContext::Ptr &context) const{ return m_operand1->evaluateEBV(context) && m_operand2->evaluateEBV(context);}Expression::Ptr AndExpression::compress(const StaticContext::Ptr &context){ const Expression::Ptr newMe(PairContainer::compress(context)); if(newMe != this) return newMe; /* Both operands mustn't be evaluated in order to be able to compress. */ if(m_operand1->isEvaluated() && !m_operand1->evaluateEBV(context->dynamicContext())) return wrapLiteral(CommonValues::BooleanFalse, context, this); else if(m_operand2->isEvaluated() && !m_operand2->evaluateEBV(context->dynamicContext())) return wrapLiteral(CommonValues::BooleanFalse, context, this); else return Expression::Ptr(this);}SequenceType::List AndExpression::expectedOperandTypes() const{ SequenceType::List result; result.append(CommonSequenceTypes::EBV); result.append(CommonSequenceTypes::EBV); return result;}SequenceType::Ptr AndExpression::staticType() const{ return CommonSequenceTypes::ExactlyOneBoolean;}ExpressionVisitorResult::Ptr AndExpression::accept(const ExpressionVisitor::Ptr &visitor) const{ return visitor->visit(this);}QT_END_NAMESPACE