/****************************************************************************
**
** 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
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** 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
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**
** 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.
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** $QT_END_LICENSE$
**
****************************************************************************/

#include <QDebug>
#include "hbtree.h"
#include "hbtreetransaction.h"

QT_BEGIN_NAMESPACE_HBTREE

HBtreeTransaction::HBtreeTransaction(HBtree *btree, HBtreeTransaction::Type type)
    : btree_(btree), type_(type), rootPage_(0xFFFFFFFF), tag_(0), revision_(0)
{
    Q_ASSERT(btree_);
}

HBtreeTransaction::~HBtreeTransaction()
{
    Q_ASSERT(btree_);
}

bool HBtreeTransaction::put(const QByteArray &key, const QByteArray &value)
{
    Q_ASSERT(btree_);
    return btree_->put(this, key, value);
}

bool HBtreeTransaction::get(const QByteArray &key, QByteArray *pValue)
{
    Q_ASSERT(pValue);
    QByteArray val = get(key);
    if (val.isEmpty())
        return false;
    *pValue = val;
    return true;
}

QByteArray HBtreeTransaction::get(const QByteArray &key)
{
    Q_ASSERT(btree_);
    return btree_->get(this, key);
}

bool HBtreeTransaction::del(const QByteArray &key)
{
    Q_ASSERT(btree_);
    return btree_->del(this, key);
}

bool HBtreeTransaction::commit(quint64 tag)
{
    Q_ASSERT(btree_);
    if (isReadOnly()) {
        btree_->abort(this);
        return true;
    }
    return btree_->commit(this, tag);
}

void HBtreeTransaction::abort()
{
    Q_ASSERT(btree_);
    btree_->abort(this);
}

QT_END_NAMESPACE_HBTREE