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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_OBJECT_TABLE_H
#define JSONDB_OBJECT_TABLE_H
#include <QObject>
#include <QHash>
#include <QList>
#include <QPair>
#include <QtEndian>
#include "jsondbobjectkey.h"
#include "jsondbbtree.h"
#include <qjsonarray.h>
#include <qjsonobject.h>
#include <qjsonvalue.h>
#include <jsondbobject.h>
#include "jsondbpartition.h"
#include "jsondbindex.h"
QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE_JSONDB_PARTITION
class JsonDbBtree;
inline QDebug &operator<<(QDebug &qdb, const JsonDbUpdate &oc)
{
qdb.nospace() << "JsonDbUpdate(";
//qdb.nospace() << oc.objectKey;
qdb.nospace() << "action = ";
switch (oc.action) {
case JsonDbNotification::None: qdb.nospace() << "None"; break;
case JsonDbNotification::Create: qdb.nospace() << "Created"; break;
case JsonDbNotification::Update: qdb.nospace() << "Updated"; break;
case JsonDbNotification::Remove: qdb.nospace() << "Removed"; break;
default: break;
}
if (oc.action != JsonDbNotification::Create)
qdb.nospace() << ", oldObject = " << oc.oldObject;
if (oc.action != JsonDbNotification::Remove)
qdb.nospace() << ", newObject = " << oc.newObject;
qdb.nospace() << ")";
return qdb;
}
class Q_JSONDB_PARTITION_EXPORT JsonDbObjectTable : public QObject
{
Q_OBJECT
public:
enum SyncFlag {
SyncObjectTable = 0x1,
SyncIndexes = 0x2,
SyncStateNumbers = 0x4
};
Q_DECLARE_FLAGS(SyncFlags, SyncFlag)
JsonDbObjectTable(JsonDbPartition *parent=0);
~JsonDbObjectTable();
QString filename() const { return mFilename; }
bool open(const QString &filename);
void close();
JsonDbPartition *partition() const { return mPartition; }
JsonDbBtree *bdb() const { return mBdb; }
bool begin();
void begin(JsonDbIndex *btree);
bool commit(quint32);
bool abort();
bool compact();
bool sync(SyncFlags flags);
JsonDbStat stat() const;
void flushCaches();
void closeIndexes();
quint32 stateNumber() const { return mStateNumber; }
quint32 storeStateChange(const ObjectKey &key, const JsonDbUpdate &stateChange);
enum TypeChangeMode {
SplitTypeChanges, KeepTypeChanges
};
quint32 changesSince(quint32 stateNumber, const QSet<QString> &limitTypes, QList<JsonDbUpdate> *updateList, TypeChangeMode mode=KeepTypeChanges);
JsonDbIndex *index(const QString &indexName);
QList<JsonDbIndex *> indexes() const;
bool addIndex(const JsonDbIndexSpec &indexSpec);
bool addIndexOnProperty(const QString &propertyName,
const QString &propertyType = QLatin1String("string"),
const QString &objectType = QString());
bool removeIndex(const QString &indexName);
void reindexObjects(const QString &indexName, quint32 stateNumber);
void indexObject(JsonDbObject object, quint32 stateNumber);
void deindexObject(JsonDbObject object, quint32 stateNumber);
void updateIndex(JsonDbIndex *index);
bool get(const ObjectKey &objectKey, QJsonObject *object, bool includeDeleted=false);
bool put(const ObjectKey &objectKey, const JsonDbObject &object);
bool remove(const ObjectKey &objectKey);
QString errorMessage() const;
GetObjectsResult getObjects(const QString &keyName, const QJsonValue &keyValue, const QString &objectType);
private:
quint32 changesSince(quint32 stateNumber, QMap<ObjectKey,JsonDbUpdate> *changes);
private:
JsonDbPartition *mPartition;
QString mFilename;
JsonDbBtree *mBdb;
QHash<QString, JsonDbIndex *> mIndexes; // indexed by full path, e.g., _type or _name.first
QVector<JsonDbBtree::Transaction *> mBdbTransactions;
quint32 mStateNumber;
QMultiMap<quint32,JsonDbUpdate> mChangeCache;
// intermediate state changes until the commit is called
QByteArray mStateChanges;
QList<JsonDbUpdate> mStateObjectChanges;
Q_DISABLE_COPY(JsonDbObjectTable)
};
void makeStateKey(QByteArray &baStateKey, quint32 stateNumber);
bool isStateKey(const QByteArray &baStateKey);
Q_DECLARE_OPERATORS_FOR_FLAGS(JsonDbObjectTable::SyncFlags)
QT_END_NAMESPACE_JSONDB_PARTITION
QT_END_HEADER
#endif // JSONDB_OBJECT_TABLE_H
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