ace_dataobject.h

#ifndef ACE_DATAOBJECT_H
#define ACE_DATAOBJECT_H
#include <QtCore>
#include "emetadata.h"
#include "global.h"
//



namespace Ace
{
   class DataObject : public QObject
   {
      Q_OBJECT
   public:
      explicit DataObject(const QString& path, QObject* parent = nullptr);
      explicit DataObject(const QString& path, quint16 type, const EMetadata& system, QObject* parent = nullptr);
      QString rawPath() const;
      QString path() const;
      QString fileName() const;
      quint16 type() const;
      qint64 size() const;
      const EMetadata& systemMeta() const;
      const EMetadata& userMeta() const;
      void seek(qint64 index) const;
      const EDataStream& stream() const;
      void allocate(int size);
      EDataStream& stream();
      EAbstractData* data();
      void setUserMeta(const EMetadata& newRoot);
      void finalize();
      void read(char* data, qint64 size) const;
      void write(const char* data, qint64 size);
   signals:
      void overwritten();
   public slots:
      void dataOverwritten(const QString& canonicalPath, Ace::DataObject* object);
   private:
      void openObject(bool overwrite);
      void readHeader();
      void writeHeader();
      void makeData(const QString& name, const QString& extension);
      constexpr static qint64 _specialValue {584};
      QString _rawPath;
      quint16 _type;
      QString _path;
      QString _fileName;
      EMetadata _system;
      QFile* _file {nullptr};
      EDataStream* _stream {nullptr};
      EAbstractData* _data {nullptr};
      qint64 _headerOffset;
      bool _headerRead {false};
      EMetadata _userMeta {EMetadata::Object};
   };
}



#endif