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/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtAddOn.JsonDb 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 Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/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 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, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef JSONDB_VIEW_H
#define JSONDB_VIEW_H
#include <QObject>
#include <QString>
#include "jsondbpartitionglobal.h"
#include "jsondbmapdefinition.h"
#include "jsondbreducedefinition.h"
QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE_JSONDB_PARTITION
class JsonDbOwner;
class JsonDbPartition;
class JsonDbObjectTable;
class Q_JSONDB_PARTITION_EXPORT JsonDbView : public QObject
{
Q_OBJECT
public:
JsonDbView(JsonDbPartition *partition, const QString &viewType,
QObject *parent = 0);
~JsonDbView();
JsonDbPartition *partition() const { return mPartition; }
JsonDbObjectTable *objectTable() const { return mViewObjectTable; }
QStringList sourceTypes() const { return mSourceTypes; }
QSet<QString> sourceTypeSet() const { return QSet<QString>::fromList(mSourceTypes); }
void open();
void close();
static void initViews(JsonDbPartition *partition);
static void createDefinition(JsonDbPartition *partition, QJsonObject definition);
static void removeDefinition(JsonDbPartition *partition, QJsonObject definition);
void updateView(quint32 stateNumber=0, JsonDbUpdateList *resultingChanges=0);
void updateEagerView(const JsonDbUpdateList &objectsUpdated, JsonDbUpdateList *resultingChanges);
void updateViewStateNumber(quint32 partitionStateNumber);
void reduceMemoryUsage();
void closeIndexes();
bool isActive() const;
Q_SIGNALS:
void updated(const QString &type);
private:
void createMapDefinition(QJsonObject mapDefinition);
void removeMapDefinition(QJsonObject mapDefinition);
void createReduceDefinition(QJsonObject reduceDefinition);
void removeReduceDefinition(QJsonObject reduceDefinition);
bool processUpdatedDefinitions(const QString &viewType, quint32 targetStateNumber,
QSet<QString> &processedDefinitions);
void updateSourceTypesList();
bool viewDefinitionUpdated(const JsonDbUpdateList &objectsUpdated) const;
void updateViewOnChanges(const JsonDbUpdateList &objectsUpdated, QSet<QString> &processedDefinitionUuids, JsonDbUpdateList *changeList);
private:
JsonDbPartition *mPartition;
JsonDbObjectTable *mViewObjectTable; // view object table
JsonDbObjectTable *mMainObjectTable; // partition's main object table
quint32 mViewStateNumber;
QString mViewType;
QStringList mSourceTypes;
typedef QMap<JsonDbObjectTable*,QSet<QString> > ObjectTableSourceTypeMap;
ObjectTableSourceTypeMap mObjectTableSourceTypeMap;
QMap<QString,JsonDbMapDefinition*> mMapDefinitions; // maps uuid to view definition
QMap<QString,JsonDbMapDefinition*> mMapDefinitionsBySource; // maps map source type to view definition
QMap<QString,JsonDbReduceDefinition*> mReduceDefinitions; // maps uuid to view definition
QMap<QString,JsonDbReduceDefinition*> mReduceDefinitionsBySource; // maps reduce source type to view definition
bool mUpdating;
friend class JsonDbMapDefinition;
friend class JsonDbReduceDefinition;
};
QT_END_NAMESPACE_JSONDB_PARTITION
QT_END_HEADER
#endif // JSONDB_VIEW_H
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