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+/****************************************************************************
+**
+** Copyright (C) 2008 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 <QVariant>
+
+#include "qabstractxmlnodemodel_p.h"
+#include "qitemmappingiterator_p.h"
+#include "qitem_p.h"
+#include "qxmlname.h"
+#include "qxmlquery_p.h"
+
+#include "qpullbridge_p.h"
+
+QT_BEGIN_NAMESPACE
+
+using namespace QPatternist;
+
+/*!
+ \brief Bridges a QPatternist::SequenceIterator to QAbstractXmlPullProvider.
+ \class QPatternist::PullBridge
+ \internal
+ \reentrant
+ \ingroup xml-tools
+
+ The approach of this class is rather straight forward since QPatternist::SequenceIterator
+ and QAbstractXmlPullProvider are conceptually similar. While QPatternist::SequenceIterator only
+ delivers top level items(since it's not an event stream, it's a list of items), PullBridge
+ needs to recursively iterate the children of nodes too, which is achieved through the
+ stack m_iterators.
+ */
+
+AbstractXmlPullProvider::Event PullBridge::next()
+{
+ m_index = m_iterators.top().second->next();
+
+ if(!m_index.isNull())
+ {
+ Item item(m_index);
+
+ if(item && item.isAtomicValue())
+ m_current = AtomicValue;
+ else
+ {
+ Q_ASSERT(item.isNode());
+
+ switch(m_index.kind())
+ {
+ case QXmlNodeModelIndex::Attribute:
+ {
+ m_current = Attribute;
+ break;
+ }
+ case QXmlNodeModelIndex::Comment:
+ {
+ m_current = Comment;
+ break;
+ }
+ case QXmlNodeModelIndex::Element:
+ {
+ m_iterators.push(qMakePair(StartElement, m_index.iterate(QXmlNodeModelIndex::AxisChild)));
+ m_current = StartElement;
+ break;
+ }
+ case QXmlNodeModelIndex::Document:
+ {
+ m_iterators.push(qMakePair(StartDocument, m_index.iterate(QXmlNodeModelIndex::AxisChild)));
+ m_current = StartDocument;
+ break;
+ }
+ case QXmlNodeModelIndex::Namespace:
+ {
+ m_current = Namespace;
+ break;
+ }
+ case QXmlNodeModelIndex::ProcessingInstruction:
+ {
+ m_current = ProcessingInstruction;
+ break;
+ }
+ case QXmlNodeModelIndex::Text:
+ {
+ m_current = Text;
+ break;
+ }
+ }
+ }
+ }
+ else
+ {
+ if(m_iterators.isEmpty())
+ m_current = EndOfInput;
+ else
+ {
+ switch(m_iterators.top().first)
+ {
+ case StartOfInput:
+ {
+ m_current = EndOfInput;
+ break;
+ }
+ case StartElement:
+ {
+ m_current = EndElement;
+ m_iterators.pop();
+ break;
+ }
+ case StartDocument:
+ {
+ m_current = EndDocument;
+ m_iterators.pop();
+ break;
+ }
+ default:
+ {
+ Q_ASSERT_X(false, Q_FUNC_INFO,
+ "Invalid value.");
+ m_current = EndOfInput;
+ }
+ }
+ }
+
+ }
+
+ return m_current;
+}
+
+AbstractXmlPullProvider::Event PullBridge::current() const
+{
+ return m_current;
+}
+
+QXmlNodeModelIndex PullBridge::index() const
+{
+ return m_index;
+}
+
+QSourceLocation PullBridge::sourceLocation() const
+{
+ return m_index.model()->sourceLocation(m_index);
+}
+
+QXmlName PullBridge::name() const
+{
+ return m_index.name();
+}
+
+QVariant PullBridge::atomicValue() const
+{
+ return QVariant();
+}
+
+QString PullBridge::stringValue() const
+{
+ return QString();
+}
+
+QHash<QXmlName, QString> PullBridge::attributes()
+{
+ Q_ASSERT(m_current == StartElement);
+
+ QHash<QXmlName, QString> attributes;
+
+ QXmlNodeModelIndex::Iterator::Ptr it = m_index.iterate(QXmlNodeModelIndex::AxisAttribute);
+ QXmlNodeModelIndex index = it->next();
+ while (!index.isNull()) {
+ const Item attribute(index);
+ attributes.insert(index.name(), index.stringValue());
+
+ index = it->next();
+ }
+
+ return attributes;
+}
+
+QHash<QXmlName, QXmlItem> PullBridge::attributeItems()
+{
+ Q_ASSERT(m_current == StartElement);
+
+ QHash<QXmlName, QXmlItem> attributes;
+
+ QXmlNodeModelIndex::Iterator::Ptr it = m_index.iterate(QXmlNodeModelIndex::AxisAttribute);
+ QXmlNodeModelIndex index = it->next();
+ while (!index.isNull()) {
+ const Item attribute(index);
+ attributes.insert(index.name(), QXmlItem(index));
+
+ index = it->next();
+ }
+
+ return attributes;
+}
+
+QT_END_NAMESPACE
+