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/****************************************************************************
**
** 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.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
#ifndef QPatternist_ResourceDelegator_p_H
#define QPatternist_ResourceDelegator_p_H
#include <QSet>
#include <QUrl>
#include "qdeviceresourceloader_p.h"
QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE
namespace QPatternist
{
/**
* @short Delegates to another ResourceLoader, but in case a URI is in an
* exception list, it delegates to a different loader.
*
* This is used for handling device variables, since when a device variable
* is rebound, a resource loader needs to carry that binding, while the
* resource loader for the other query remains as is.
*
* @since 4.5
* @author Frans Englich <frans.englich@nokia.com>
*/
class ResourceDelegator : public DeviceResourceLoader
{
public:
ResourceDelegator(const QSet<QUrl> &needsOverride,
const ResourceLoader::Ptr &parentLoader,
const ResourceLoader::Ptr &forDeviceLoader) : m_needsOverride(needsOverride)
, m_parentLoader(parentLoader)
, m_forDeviceLoader(forDeviceLoader)
{
Q_ASSERT(m_parentLoader);
}
virtual bool isUnparsedTextAvailable(const QUrl &uri,
const QString &encoding);
virtual ItemType::Ptr announceUnparsedText(const QUrl &uri);
virtual Item openUnparsedText(const QUrl &uri,
const QString &encoding,
const ReportContext::Ptr &context,
const SourceLocationReflection *const where);
virtual Item openDocument(const QUrl &uri,
const ReportContext::Ptr &context);
virtual SequenceType::Ptr announceDocument(const QUrl &uri, const Usage usageHint);
virtual bool isDocumentAvailable(const QUrl &uri);
virtual Item::Iterator::Ptr openCollection(const QUrl &uri);
virtual SequenceType::Ptr announceCollection(const QUrl &uri);
/**
* Returns the union of the deviceURIs() that ResourceDelegator's two
* resource loaders has.
*/
virtual QSet<QUrl> deviceURIs() const;
private:
const QSet<QUrl> m_needsOverride;
const ResourceLoader::Ptr m_parentLoader;
const ResourceDelegator::Ptr m_forDeviceLoader;
};
}
QT_END_NAMESPACE
QT_END_HEADER
#endif
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