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/**************************************************************************
**
** This file is part of the Qt Build Suite
**
** Copyright (c) 2012 Nokia Corporation and/or its subsidiary(-ies).
**
** Contact: Nokia Corporation (info@qt.nokia.com)
**
**
** 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.
**
**************************************************************************/
#ifndef QBS_PERSISTENCE
#define QBS_PERSISTENCE
#include <QtCore/QString>
#include <QtCore/QSharedPointer>
#include <QtCore/QFile>
#include <QtCore/QDataStream>
#include <QtCore/QMap>
#include <QtCore/QVariantMap>
#include <QtCore/QDebug>
#include <tools/error.h>
namespace qbs {
typedef int PersistentObjectId;
typedef QByteArray PersistentObjectData;
class PersistentPool;
class PersistentObject
{
public:
virtual ~PersistentObject() {}
virtual void load(PersistentPool &/*pool*/, PersistentObjectData &/*data*/) {}
virtual void store(PersistentPool &/*pool*/, PersistentObjectData &/*data*/) const {}
};
class PersistentPool
{
public:
PersistentPool();
~PersistentPool();
struct HeadData
{
QVariantMap projectConfig;
};
enum LoadMode
{
LoadHeadData, LoadAll
};
bool load(const QString &filePath, const LoadMode loadMode = LoadAll);
bool store(const QString &filePath);
void clear();
template <typename T>
inline T *idLoad(QDataStream &s)
{
PersistentObjectId id;
s >> id;
return loadRaw<T>(id);
}
template <class T>
inline T *loadRaw(PersistentObjectId id)
{
if (id == 0)
return 0;
PersistentObject *obj = 0;
if (id < m_loadedRaw.count()) {
obj = m_loadedRaw.value(id);
} else {
int i = m_loadedRaw.count();
m_loadedRaw.resize(id + 1);
for (; i < m_loadedRaw.count(); ++i)
m_loadedRaw[i] = 0;
}
if (!obj) {
if (id >= m_storage.count())
throw Error(QString("storage error: no id %1 stored.").arg(id).arg(m_storage.count()));
PersistentObjectData data = m_storage.at(id);
obj = new T;
m_loadedRaw[id] = obj;
obj->load(*this, data);
}
return static_cast<T*>(obj);
}
template <class T>
inline typename T::Ptr idLoadS(QDataStream &s)
{
PersistentObjectId id;
s >> id;
return load<T>(id);
}
template <class T>
inline QSharedPointer<T> load(PersistentObjectId id)
{
if (id == 0)
return QSharedPointer<T>();
QSharedPointer<PersistentObject> obj;
if (id < m_loaded.count())
obj = m_loaded.value(id);
else
m_loaded.resize(id + 1);
if (!obj) {
if (id >= m_storage.count())
throw Error(QString("storage error: no id %1 stored. I have that many: %2").arg(id).arg(m_storage.count()));
PersistentObjectData data = m_storage.at(id);
T *t = new T;
obj = QSharedPointer<PersistentObject>(t);
m_loaded[id] = obj;
obj->load(*this, data);
}
return obj.staticCast<T>();
}
PersistentObject *load(PersistentObjectId);
template <class T>
PersistentObjectId store(QSharedPointer<T> ptr)
{
return store(ptr.data());
}
PersistentObjectId store(PersistentObject *object);
int storeString(const QString &t);
QString loadString(int id);
QString idLoadString(QDataStream &s);
QList<int> storeStringSet(const QSet<QString> &t);
QSet<QString> loadStringSet(const QList<int> &id);
QSet<QString> idLoadStringSet(QDataStream &s);
QList<int> storeStringList(const QStringList &t);
QStringList loadStringList(const QList<int> &ids);
QStringList idLoadStringList(QDataStream &s);
PersistentObjectData getData(PersistentObjectId) const;
void setData(PersistentObjectId, PersistentObjectData);
const HeadData &headData() const { return m_headData; }
void setHeadData(const HeadData &hd) { m_headData = hd; }
private:
static const int m_maxReservedId = 0;
HeadData m_headData;
QVector<PersistentObject *> m_loadedRaw;
QVector<QSharedPointer<PersistentObject> > m_loaded;
QVector<PersistentObjectData> m_storage;
QHash<PersistentObject *, int> m_storageIndices;
QVector<QString> m_stringStorage;
QHash<QString, int> m_inverseStringStorage;
};
template<typename T> struct RemovePointer { typedef T Type; };
template<typename T> struct RemovePointer<T*> { typedef T Type; };
template <typename T>
void loadContainerS(T &container, QDataStream &s, qbs::PersistentPool &pool)
{
int count;
s >> count;
container.clear();
container.reserve(count);
for (int i = count; --i >= 0;)
container += pool.idLoadS<typename T::value_type::Type>(s);
}
template <typename T>
void loadContainer(T &container, QDataStream &s, qbs::PersistentPool &pool)
{
int count;
s >> count;
container.clear();
container.reserve(count);
for (int i = count; --i >= 0;)
container += pool.idLoad<typename RemovePointer<typename T::value_type>::Type>(s);
}
template <typename T>
void storeContainer(T &container, QDataStream &s, qbs::PersistentPool &pool)
{
s << container.count();
typename T::const_iterator it = container.constBegin();
const typename T::const_iterator itEnd = container.constEnd();
for (; it != itEnd; ++it)
s << pool.store(*it);
}
template <typename T>
void storeHashContainer(T &container, QDataStream &s, qbs::PersistentPool &pool)
{
s << container.count();
foreach (const typename T::mapped_type &item, container)
s << pool.store(item);
}
} // namespace qbs
#endif
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