/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: http://www.qt-project.org/
**
** This file is part of the QtXmlPatterns module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** 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.
**
** 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.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/


#include "qexpressionvariablereference_p.h"

QT_BEGIN_NAMESPACE

using namespace QPatternist;

ExpressionVariableReference::ExpressionVariableReference(const VariableSlotID slotP,
                                                         const VariableDeclaration::Ptr &varDecl) : VariableReference(slotP)
                                                                                                  , m_varDecl(varDecl)
{
}

bool ExpressionVariableReference::evaluateEBV(const DynamicContext::Ptr &context) const
{
    return context->expressionVariable(slot())->evaluateEBV(context);
}

Item ExpressionVariableReference::evaluateSingleton(const DynamicContext::Ptr &context) const
{
    return context->expressionVariable(slot())->evaluateSingleton(context);
}

Item::Iterator::Ptr ExpressionVariableReference::evaluateSequence(const DynamicContext::Ptr &context) const
{
    return context->expressionVariable(slot())->evaluateSequence(context);
}
Expression::Ptr ExpressionVariableReference::typeCheck(const StaticContext::Ptr &context,
                                                       const SequenceType::Ptr &reqType)
{
    if(m_varDecl->canSourceRewrite)
        return m_varDecl->expression()->typeCheck(context, reqType);
    else
        return VariableReference::typeCheck(context, reqType);
}

Expression::ID ExpressionVariableReference::id() const
{
    return IDExpressionVariableReference;
}

ExpressionVisitorResult::Ptr ExpressionVariableReference::accept(const ExpressionVisitor::Ptr &visitor) const
{
    return visitor->visit(this);
}

SequenceType::Ptr ExpressionVariableReference::staticType() const
{
    return m_varDecl->expression()->staticType();
}

QT_END_NAMESPACE