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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtXmlPatterns module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
//
// 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>
#include <private/qacceltree_p.h>
#include <private/qacceltreebuilder_p.h>
#include <private/qdeviceresourceloader_p.h>
#include <private/qnamepool_p.h>
#include <private/qnetworkaccessdelegator_p.h>
#include <private/qreportcontext_p.h>
QT_BEGIN_NAMESPACE
class QIODevice;
namespace QPatternist
{
/**
* @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
#endif
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