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Copy / Clone method for handle and hgsetget class

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Enable deep copying of child objects of classes handle or hgsetget

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Description

The handle or hgsetget classes miss a method to make deep copies of objects. The two classes "handleplus" and "hgsetgetplus" take care of this.

To use these classes, ...
- simply put them somewhere on your Matlab path.
- in classdef-files change instances of
  "classdef MyClass < handle" (or hgsetget)
to
  "classdef MyClass < handleplus" (or hgsetgetplus)

Suppose you have defined a "MyClass" as child of "handleplus". Deep copies are now created as follows:
>> OBJ = MyClass;
>> OBJ_new = OBJ.copy;

Some short notes:
- This implementation (hopefully) also handles deep copying of inherited private or protected properties (s. discussion "Clone Handle Object - using MATLAB OOP" -> link in acknowledgments).
- It handles properties, which contain handle-objects
- It does not handle cyclic references (s. mathforum.org/kb/message.jspa?messageID=7629086&tstart=0)

Please read the help for these files for more details and report any bugs.

Cheers

Sebastian

Acknowledgements

Clone Handle Object Using Matlab Oop inspired this file.

Required Products MATLAB
MATLAB release MATLAB 7.13 (R2011b)
Other requirements This will only work for Matlab releases, which can handle the new OOP-style. To my knowledge, this was implemented in Matlab 7.6.
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Comments and Ratings (1)
22 Mar 2013 Marc Crapeau

The problem is this class cannot handle the copy of protected/private properties defined by the classes which derive from it. Thus we need to declare public all the properties of the children classes and so forget encapsulation...

It is not a criticism, there is no way to reach private and protected properties of a subclass from its superclass, so you cannot do better :)

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