/****************************************************************************+
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**+
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** Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies).+
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** All rights reserved.+
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** Contact: Nokia Corporation (qt-info@nokia.com)+
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**+
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** This file is part of the QtXmlPatterns module of the Qt Toolkit.+
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**+
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** $QT_BEGIN_LICENSE:LGPL$+
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** No Commercial Usage+
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** This file contains pre-release code and may not be distributed.+
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** You may use this file in accordance with the terms and conditions+
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** contained in the Technology Preview License Agreement accompanying+
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** this package.+
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**+
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** GNU Lesser General Public License Usage+
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** Alternatively, this file may be used under the terms of the GNU Lesser+
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** General Public License version 2.1 as published by the Free Software+
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** Foundation and appearing in the file LICENSE.LGPL included in the+
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** packaging of this file.  Please review the following information to+
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** ensure the GNU Lesser General Public License version 2.1 requirements+
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.+
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**+
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** In addition, as a special exception, Nokia gives you certain additional+
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** rights.  These rights are described in the Nokia Qt LGPL Exception+
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.+
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**+
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** If you have questions regarding the use of this file, please contact+
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** Nokia at qt-info@nokia.com.+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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** $QT_END_LICENSE$+
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**+
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****************************************************************************/+
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+
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#include <QVariant>+
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+
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#include "qabstractxmlnodemodel_p.h"+
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#include "qitemmappingiterator_p.h"+
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#include "qitem_p.h"+
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#include "qxmlname.h"+
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#include "qxmlquery_p.h"+
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+
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#include "qpullbridge_p.h"+
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+
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QT_BEGIN_NAMESPACE+
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+
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using namespace QPatternist;+
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+
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/*!+
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  \brief Bridges a QPatternist::SequenceIterator to QAbstractXmlPullProvider.+
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  \class QPatternist::PullBridge+
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  \internal+
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  \reentrant+
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  \ingroup xml-tools+
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+
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  The approach of this class is rather straight forward since QPatternist::SequenceIterator+
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  and QAbstractXmlPullProvider are conceptually similar. While QPatternist::SequenceIterator only+
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  delivers top level items(since it's not an event stream, it's a list of items), PullBridge+
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  needs to recursively iterate the children of nodes too, which is achieved through the+
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  stack m_iterators.+
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 */+
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+
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AbstractXmlPullProvider::Event PullBridge::next()+
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{+
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    m_index = m_iterators.top().second->next();+
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+
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    if(!m_index.isNull())+
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    {+
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        Item item(m_index);+
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+
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        if(item && item.isAtomicValue())+
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            m_current = AtomicValue;+
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        else+
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        {+
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            Q_ASSERT(item.isNode());+
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+
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            switch(m_index.kind())+
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            {+
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                case QXmlNodeModelIndex::Attribute:+
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                {+
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                    m_current = Attribute;+
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                    break;+
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                }+
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                case QXmlNodeModelIndex::Comment:+
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                {+
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                    m_current = Comment;+
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                    break;+
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                }+
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                case QXmlNodeModelIndex::Element:+
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                {+
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                    m_iterators.push(qMakePair(StartElement, m_index.iterate(QXmlNodeModelIndex::AxisChild)));+
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                    m_current = StartElement;+
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                    break;+
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                }+
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                case QXmlNodeModelIndex::Document:+
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                {+
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                    m_iterators.push(qMakePair(StartDocument, m_index.iterate(QXmlNodeModelIndex::AxisChild)));+
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                    m_current = StartDocument;+
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                    break;+
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                }+
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                case QXmlNodeModelIndex::Namespace:+
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                {+
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                    m_current = Namespace;+
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                    break;+
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                }+
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                case QXmlNodeModelIndex::ProcessingInstruction:+
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                {+
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                    m_current = ProcessingInstruction;+
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                    break;+
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                }+
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                case QXmlNodeModelIndex::Text:+
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                {+
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                    m_current = Text;+
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                    break;+
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                }+
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            }+
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        }+
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    }+
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    else+
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    {+
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        if(m_iterators.isEmpty())+
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            m_current = EndOfInput;+
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        else+
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        {+
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            switch(m_iterators.top().first)+
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            {+
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                case StartOfInput:+
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                {+
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                    m_current = EndOfInput;+
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                    break;+
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                }+
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                case StartElement:+
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                {+
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                    m_current = EndElement;+
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                    m_iterators.pop();+
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                    break;+
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                }+
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                case StartDocument:+
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                {+
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                    m_current = EndDocument;+
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                    m_iterators.pop();+
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                    break;+
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                }+
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                default:+
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                {+
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                    Q_ASSERT_X(false, Q_FUNC_INFO,+
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                               "Invalid value.");+
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                    m_current = EndOfInput;+
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                }+
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            }+
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        }+
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+
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    }+
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+
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    return m_current;+
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}+
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+
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AbstractXmlPullProvider::Event PullBridge::current() const+
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{+
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    return m_current;+
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}+
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+
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QXmlNodeModelIndex PullBridge::index() const+
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{+
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    return m_index;+
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}+
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+
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QSourceLocation PullBridge::sourceLocation() const+
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{+
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    return m_index.model()->sourceLocation(m_index);+
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}+
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+
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QXmlName PullBridge::name() const+
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{+
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    return m_index.name();+
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}+
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+
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QVariant PullBridge::atomicValue() const+
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{+
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    return QVariant();+
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}+
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+
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QString PullBridge::stringValue() const+
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{+
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    return QString();+
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}+
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+
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QHash<QXmlName, QString> PullBridge::attributes()+
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{+
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    Q_ASSERT(m_current == StartElement);+
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+
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    QHash<QXmlName, QString> attributes;+
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+
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    QXmlNodeModelIndex::Iterator::Ptr it = m_index.iterate(QXmlNodeModelIndex::AxisAttribute);+
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    QXmlNodeModelIndex index = it->next();+
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    while (!index.isNull()) {+
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        const Item attribute(index);+
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        attributes.insert(index.name(), index.stringValue());+
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+
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        index = it->next();+
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    }+
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+
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    return attributes;+
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}+
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+
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QHash<QXmlName, QXmlItem> PullBridge::attributeItems()+
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{+
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    Q_ASSERT(m_current == StartElement);+
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+
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    QHash<QXmlName, QXmlItem> attributes;+
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+
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    QXmlNodeModelIndex::Iterator::Ptr it = m_index.iterate(QXmlNodeModelIndex::AxisAttribute);+
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    QXmlNodeModelIndex index = it->next();+
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    while (!index.isNull()) {+
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        const Item attribute(index);+
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        attributes.insert(index.name(), QXmlItem(index));+
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+
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        index = it->next();+
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    }+
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+
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    return attributes;+
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}+
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+
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QT_END_NAMESPACE+
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+
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