/****************************************************************************
**
** Copyright (C) 2011 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.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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 "qbuiltintypes_p.h"
#include "qcommonsequencetypes_p.h"

#include "qparentnodeaxis_p.h"

QT_BEGIN_NAMESPACE

using namespace QPatternist;

Item ParentNodeAxis::evaluateSingleton(const DynamicContext::Ptr &context) const
{
    return context->contextItem().asNode().iterate(QXmlNodeModelIndex::AxisParent)->next();
}

Expression::Properties ParentNodeAxis::properties() const
{
    return DisableElimination | RequiresContextItem;
}

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

ItemType::Ptr ParentNodeAxis::expectedContextItemType() const
{
    return BuiltinTypes::node;
}

SequenceType::Ptr ParentNodeAxis::staticType() const
{
    // Parentless node exists.
    return CommonSequenceTypes::ZeroOrOneNode;
}

QT_END_NAMESPACE