Change namespace of custom DataCell/DataValue, keep backwards compatibility

Node Development
1

I have a custom DataCell + DataValue combination, for which I would like to change the package namespace, b/c requirements and usage in the project has changed. When I simply move the two classes to a different package, existing tables which contain the corresponding types cannot be deserialized any longer, obviously.

Is there any trick to ensure, that existing data can still be deserialized? I already tried keeping a placeholder class in the old package, where the static #getCellSerializer method would just delegate to the moved class, but that does not work (i.e. getting exceptions during deserialization of existing tables).

Any help appreciated!

2

Maybe AdapterCells can help in this case. As I understand you can create conversion/adaption from the old version to the new implementation.

3

Thank you, that might be a solution, however it sounds rather complicated. I would prefer some more simple variant, if there is such :) (basically all I need, is being able to redirect the deserialization to the new/moved class).

Best,
Philipp

4

This is not possible until we have an extension point for data types.