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/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/
**
** This file is part of the QtAddOn.JsonDb module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** 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.
**
** 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.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef JSONDB_BTREE_H
#define JSONDB_BTREE_H
#define JSONDB_USE_HBTREE
#include "jsondbpartitionglobal.h"
#ifndef JSONDB_USE_HBTREE
#include "qbtree.h"
#include "qbtreecursor.h"
#include "qbtreetxn.h"
#else
#include "hbtree.h"
#include "hbtreecursor.h"
#include "hbtreetransaction.h"
#endif
QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE_JSONDB_PARTITION
class JsonDbBtree
{
public:
enum OpenFlag {
Default,
ReadOnly
};
Q_DECLARE_FLAGS(OpenFlags, OpenFlag)
#ifdef JSONDB_USE_HBTREE
typedef HBtree Btree;
#else
typedef QBtree Btree;
#endif
typedef Btree::CursorType Cursor;
typedef Btree::TransactionType Transaction;
typedef Btree::StatType Stat;
typedef int (*CompareFunction)(const QByteArray &, const QByteArray &);
JsonDbBtree();
~JsonDbBtree();
void setFileName(const QString &filename);
QString fileName() const;
bool open(OpenFlags flags = Default);
void close();
bool isOpen() const;
Transaction *beginRead()
{ Q_ASSERT(mBtree); return mBtree->beginRead(); }
Transaction *beginWrite()
{ Q_ASSERT(mBtree); return mBtree->beginWrite(); }
bool isWriting() const
{ Q_ASSERT(mBtree); return mBtree->isWriting(); }
Transaction *writeTransaction()
{ Q_ASSERT(mBtree); return mBtree->writeTransaction(); }
QString errorMessage() const
{ Q_ASSERT(mBtree); return mBtree->errorMessage(); }
quint64 count() const
{ Q_ASSERT(mBtree); return mBtree->count(); }
quint32 tag() const
{ Q_ASSERT(mBtree); return mBtree->tag(); }
void setCompareFunction(CompareFunction cmp)
{ Q_ASSERT(mBtree); mBtree->setCompareFunction(cmp); }
void setCacheSize(int size)
{ Q_ASSERT(mBtree); mBtree->setCacheSize(size); }
Btree *btree() const
{ return mBtree; }
Stat stats() const;
bool sync()
{ Q_ASSERT(mBtree); return mBtree->sync(); }
int lastWriteError() const
{ Q_ASSERT(mBtree); return mBtree->lastWriteError(); }
int lastReadError() const
{ Q_ASSERT(mBtree); return mBtree->lastReadError(); }
bool putOne(const QByteArray &key, const QByteArray &value);
bool getOne(const QByteArray &key, QByteArray *value);
bool removeOne(const QByteArray &key);
bool clearData();
bool compact();
bool rollback();
void setAutoCompactRate(int rate) const;
private:
Btree *mBtree;
JsonDbBtree(const JsonDbBtree&);
};
Q_DECLARE_OPERATORS_FOR_FLAGS(JsonDbBtree::OpenFlags)
QT_END_NAMESPACE_JSONDB_PARTITION
QT_END_HEADER
#endif // JSONDB_BTREE_H
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