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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 Patternist_AccelTreeResourceLoader_H
#define Patternist_AccelTreeResourceLoader_H
#include <QtCore/QEventLoop>
#include <QtNetwork/QNetworkReply>
#include "qabstractxmlreceiver.h"
#include "qacceltree_p.h"
#include "qacceltreebuilder_p.h"
#include "qdeviceresourceloader_p.h"
#include "qnamepool_p.h"
#include "qnetworkaccessdelegator_p.h"
#include "qreportcontext_p.h"
QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE
class QIODevice;
namespace QPatternist
{
/**
* @short An helper class which enables QNetworkAccessManager
* to be used in a blocking manner.
*
* @see AccelTreeResourceLoader::load()
* @author Frans Englich <frans.englich@nokia.com>
*/
class NetworkLoop : public QEventLoop
{
Q_OBJECT
public:
NetworkLoop() : m_hasReceivedError(false)
{
}
public Q_SLOTS:
void error(QNetworkReply::NetworkError code)
{
Q_UNUSED(code);
m_hasReceivedError = true;
exit(1);
}
void finished()
{
if(m_hasReceivedError)
exit(1);
else
exit(0);
}
private:
bool m_hasReceivedError;
};
/**
* @short Handles requests for documents, and instantiates
* them as AccelTree instances.
*
* @author Frans Englich <frans.englich@nokia.com>
*/
class Q_AUTOTEST_EXPORT AccelTreeResourceLoader : public DeviceResourceLoader
{
public:
/**
* Describes the behaviour of the resource loader in case of an
* error.
*/
enum ErrorHandling
{
FailOnError, ///< The resource loader will report the error via the report context.
ContinueOnError ///< The resource loader will report no error and return an empty QNetworkReply.
};
/**
* AccelTreeResourceLoader does not own @p context.
*/
AccelTreeResourceLoader(const NamePool::Ptr &np,
const NetworkAccessDelegator::Ptr &networkDelegator, AccelTreeBuilder<true>::Features = AccelTreeBuilder<true>::NoneFeature);
virtual Item openDocument(const QUrl &uri,
const ReportContext::Ptr &context);
virtual Item openDocument(QIODevice *source, const QUrl &documentUri,
const ReportContext::Ptr &context);
virtual SequenceType::Ptr announceDocument(const QUrl &uri, const Usage usageHint);
virtual bool isDocumentAvailable(const QUrl &uri);
virtual bool isUnparsedTextAvailable(const QUrl &uri,
const QString &encoding);
virtual Item openUnparsedText(const QUrl &uri,
const QString &encoding,
const ReportContext::Ptr &context,
const SourceLocationReflection *const where);
/**
* @short Helper function that do NetworkAccessDelegator::get(), but
* does it blocked.
*
* The returned QNetworkReply has emitted QNetworkReply::finished().
*
* The caller owns the return QIODevice instance.
*
* @p context may be @c null or valid. If @c null, no error reporting
* is done and @c null is returned.
*
* @see NetworkAccessDelegator
*/
static QNetworkReply *load(const QUrl &uri,
QNetworkAccessManager *const networkManager,
const ReportContext::Ptr &context, ErrorHandling handling = FailOnError);
/**
* @overload
*/
static QNetworkReply *load(const QUrl &uri,
const NetworkAccessDelegator::Ptr &networkDelegator,
const ReportContext::Ptr &context, ErrorHandling handling = FailOnError);
/**
* @short Returns the URIs this AccelTreeResourceLoader has loaded
* which are for devices through variable bindings.
*/
virtual QSet<QUrl> deviceURIs() const;
virtual void clear(const QUrl &uri);
private:
static bool streamToReceiver(QIODevice *const dev,
AccelTreeBuilder<true> *const receiver,
const NamePool::Ptr &np,
const ReportContext::Ptr &context,
const QUrl &uri);
bool retrieveDocument(const QUrl &uri,
const ReportContext::Ptr &context);
bool retrieveDocument(QIODevice *source, const QUrl &documentUri,
const ReportContext::Ptr &context);
/**
* If @p context is @c null, no error reporting should be done.
*/
bool retrieveUnparsedText(const QUrl &uri,
const QString &encoding,
const ReportContext::Ptr &context,
const SourceLocationReflection *const where);
QHash<QUrl, AccelTree::Ptr> m_loadedDocuments;
const NamePool::Ptr m_namePool;
const NetworkAccessDelegator::Ptr m_networkAccessDelegator;
QHash<QPair<QUrl, QString>, QString> m_unparsedTexts;
AccelTreeBuilder<true>::Features m_features;
};
}
QT_END_NAMESPACE
QT_END_HEADER
#endif
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