MATLAB Object-Oriented Programming

Basic saveobj and loadobj Pattern

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“Using saveobj and loadobj” on page 13-19

“Handle Load Problems” on page 13-20

Using saveobj and loadobj

Depending on the requirements of your class, there are various ways you can use

saveobj and loadobj methods. This pattern is a flexible way to solve problems that you

cannot address by simpler means.

The basic process is:

• Use saveobj to save all essential data in a struct and do not save the object.


• Use loadobj to reconstruct the object from the saved data.

This approach is not useful in cases where you cannot save property values in a struct

field. Data that you cannot save, such as a file identifier, you can possibly regenerate in

the loadobj method.

saveobj

For this pattern, define saveobj as an ordinary method that accepts an object of the

class and returns a struct.

• Copy each property value to a structure field of the same name.


• You can save only the data that is necessary to rebuild the object. Avoid saving whole
  objects hierarchies, such as those created by graphs.

methods

function s = saveobj(obj)

s.Prop1 = obj.Prop1;

s.Prop2 = obj.Prop2

s.Data = obj.GraphHandle.YData;

end

end

Basic saveobj and loadobj Pattern