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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_INDEX_P_H
#define JSONDB_INDEX_P_H
#include <QObject>
#include <QJSEngine>
#include <QPointer>
#include <QStringList>
#include <QHash>
#include <qjsonarray.h>
#include <qjsonobject.h>
#include <qjsonvalue.h>
#include "jsondbpartitionglobal.h"
#include "jsondbobject.h"
#include "jsondbbtree.h"
#include "jsondbcollator.h"
#include "jsondbindex.h"
QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE_JSONDB_PARTITION
class JsonDbIndex;
class JsonDbObjectTable;
class Q_JSONDB_PARTITION_EXPORT JsonDbIndexPrivate
{
Q_DECLARE_PUBLIC(JsonDbIndex)
public:
JsonDbIndexPrivate(JsonDbIndex *q);
~JsonDbIndexPrivate();
JsonDbIndex *q_ptr;
JsonDbIndexSpec mSpec;
JsonDbObjectTable *mObjectTable;
QString mPath;
QString mBaseName;
QStringList mPropertyNamePath;
#ifndef NO_COLLATION_SUPPORT
JsonDbCollator mCollator;
#endif
JsonDbBtree mBdb;
QPointer<QJSEngine> mScriptEngine;
QJSValue mPropertyFunction;
QList<QJsonValue> mFieldValues;
quint32 mCacheSize;
// query --> {offset, key} cache to speed up offset queries
typedef QMap<int, QByteArray> OffsetCacheMap; // offset -> key
QHash<QString, OffsetCacheMap> mOffsetCache; // query -> offset map
QByteArray lowerBoundKey (const QString &query, int &offset) const;
void addOffsetToCache (const QString &query, int &offset, QByteArray &key);
QString fileName() const;
bool initScriptEngine();
QJsonValue indexValue(const QJsonValue &v);
// private slots
void _q_propertyValueEmitted(QJSValue value);
static int indexCompareFunction(const QByteArray &ab, const QByteArray &bb);
static QByteArray makeForwardKey(const QJsonValue &fieldValue, const ObjectKey &objectKey);
static QByteArray makeForwardValue(const ObjectKey &objectKey);
static void truncateFieldValue(QJsonValue *value, const QString &type);
static QJsonValue makeFieldValue(const QJsonValue &value, const QString &type);
static void forwardKeySplit(const QByteArray &forwardKey, QJsonValue &fieldValue);
static void forwardKeySplit(const QByteArray &forwardKey, QJsonValue &fieldValue, ObjectKey &objectKey);
static void forwardValueSplit(const QByteArray &forwardValue, ObjectKey &objectKey);
};
QT_END_NAMESPACE_JSONDB_PARTITION
QT_END_HEADER
#endif // JSONDB_INDEX_P_H
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