emetadata.h

#ifndef EMETADATA_H
#define EMETADATA_H
#include "global.h"



class QString;
class QByteArray;
class QJsonValue;
//



class EMetadata
{
public:
   friend EDebug& operator<<(EDebug& debug, const EMetadata*const meta);
public:
   EMetadata& operator=(const EMetadata& object);
   EMetadata& operator=(EMetadata&& object);
public:
   enum Type
   {
      Null
      ,Bool
      ,Double
      ,String
      ,Bytes
      ,Array
      ,Object
   };
   EMetadata(Type type = Null);
   EMetadata(double value);
   EMetadata(const QString& value);
   EMetadata(const QByteArray& value);
   EMetadata(const EMetaArray& value);
   EMetadata(const EMetaObject& value);
   EMetadata(const QJsonValue& value);
   EMetadata(const EMetadata& object);
   EMetadata(EMetadata&& object);
   ~EMetadata();
   QJsonValue toJson() const;
   EMetadata::Type type() const;
   bool isNull() const;
   bool isBool() const;
   bool isDouble() const;
   bool isString() const;
   bool isBytes() const;
   bool isArray() const;
   bool isObject() const;
   const bool& toBool() const;
   const double& toDouble() const;
   const QString& toString() const;
   const QByteArray& toBytes() const;
   const EMetaArray& toArray() const;
   const EMetaObject& toObject() const;
   bool& toBool();
   double& toDouble();
   QString& toString();
   QByteArray& toBytes();
   EMetaArray& toArray();
   EMetaObject& toObject();
   static QString typeName(Type type);
private:
   void checkType(Type type) const;
   void clear();
   void create();
   void copy(const void* data);
   Type _type;
   void* _data {nullptr};
};



#endif