I noticed two different patterns in the definition of the public SCA and SDO API classes.

SCA:
A delegation pattern where the public API class delegates calls to an implementation class. For example ComponentContext contains a private pointer to ComponentContextImpl. ComponentContextImpl implements the methods from ComponentContext but does not extend ComponentContext.

SDO:
Inheritance, where the implementation class extends the public API class.
For example DataFactoryImpl extends DataFactory.

Is there any particular reason for the two different patterns? Any advantages or issues with one compared the other?

A related question. What do you think about reorganizing the folder structure a little to clearly separate the spec includes from the implementation specific ones?

--
Jean-Sebastien


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