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/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt Build Suite.
**
** 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.
**
****************************************************************************/
#ifndef QBS_PERSISTENCE
#define QBS_PERSISTENCE
#include "persistentobject.h"
#include <logging/logger.h>
#include <QDataStream>
#include <QSharedPointer>
#include <QString>
#include <QVariantMap>
#include <QVector>
namespace qbs {
namespace Internal {
class PersistentPool
{
public:
PersistentPool(const Logger &logger);
~PersistentPool();
class HeadData
{
public:
QVariantMap projectConfig;
};
void load(const QString &filePath);
void setupWriteStream(const QString &filePath);
void finalizeWriteStream();
void closeStream();
void clear();
QDataStream &stream();
template <typename T> T *idLoad();
template <typename T> void loadContainer(T &container);
template <class T> QSharedPointer<T> idLoadS();
template <typename T> void loadContainerS(T &container);
void store(const QSharedPointer<const PersistentObject> &ptr) { store(ptr.data()); }
void store(const PersistentObject *object);
template <typename T> void storeContainer(const T &container);
void store(const QVariantMap &map);
QVariantMap loadVariantMap();
void store(const QVariant &variant);
QVariant loadVariant();
void storeString(const QString &t);
QString loadString(int id);
QString idLoadString();
void storeStringSet(const QSet<QString> &t);
QSet<QString> loadStringSet(const QList<int> &id);
QSet<QString> idLoadStringSet();
void storeStringList(const QStringList &t);
QStringList loadStringList(const QList<int> &ids);
QStringList idLoadStringList();
const HeadData &headData() const { return m_headData; }
void setHeadData(const HeadData &hd) { m_headData = hd; }
private:
typedef int PersistentObjectId;
template<typename T> struct RemovePointer { typedef T Type; };
template<typename T> struct RemovePointer<T*> { typedef T Type; };
template <class T> struct RemoveConst { typedef T Type; };
template <class T> struct RemoveConst<const T> { typedef T Type; };
template <class T> T *loadRaw(PersistentObjectId id);
template <class T> QSharedPointer<T> load(PersistentObjectId id);
QDataStream m_stream;
HeadData m_headData;
QVector<PersistentObject *> m_loadedRaw;
QVector<QSharedPointer<PersistentObject> > m_loaded;
QHash<const PersistentObject *, int> m_storageIndices;
PersistentObjectId m_lastStoredObjectId;
QVector<QString> m_stringStorage;
QHash<QString, int> m_inverseStringStorage;
PersistentObjectId m_lastStoredStringId;
Logger m_logger;
};
template <typename T> inline T *PersistentPool::idLoad()
{
PersistentObjectId id;
stream() >> id;
return loadRaw<T>(id);
}
template <typename T> inline void PersistentPool::loadContainer(T &container)
{
int count;
stream() >> count;
container.clear();
container.reserve(count);
for (int i = count; --i >= 0;)
container += idLoad<typename RemovePointer<typename T::value_type>::Type>();
}
template <class T> inline QSharedPointer<T> PersistentPool::idLoadS()
{
PersistentObjectId id;
m_stream >> id;
return load<T>(id);
}
template <typename T> inline void PersistentPool::loadContainerS(T &container)
{
int count;
stream() >> count;
container.clear();
container.reserve(count);
for (int i = count; --i >= 0;)
container += idLoadS<typename RemoveConst<typename T::value_type::value_type>::Type>();
}
template <typename T> inline void PersistentPool::storeContainer(const T &container)
{
stream() << container.count();
typename T::const_iterator it = container.constBegin();
const typename T::const_iterator itEnd = container.constEnd();
for (; it != itEnd; ++it)
store(*it);
}
template <class T> inline T *PersistentPool::loadRaw(PersistentObjectId id)
{
if (id < 0)
return 0;
if (id < m_loadedRaw.count()) {
PersistentObject *obj = m_loadedRaw.value(id);
return dynamic_cast<T*>(obj);
}
int i = m_loadedRaw.count();
m_loadedRaw.resize(id + 1);
for (; i < m_loadedRaw.count(); ++i)
m_loadedRaw[i] = 0;
T * const t = new T;
PersistentObject * const po = t;
m_loadedRaw[id] = po;
po->load(*this);
return t;
}
template <class T> inline QSharedPointer<T> PersistentPool::load(PersistentObjectId id)
{
if (id < 0)
return QSharedPointer<T>();
if (id < m_loaded.count()) {
QSharedPointer<PersistentObject> obj = m_loaded.value(id);
return obj.dynamicCast<T>();
}
m_loaded.resize(id + 1);
const QSharedPointer<T> t = T::create();
m_loaded[id] = t;
PersistentObject * const po = t.data();
po->load(*this);
return t;
}
} // namespace Internal
} // namespace qbs
#endif
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