How many times one module can exist in layer graph

[Alan Bateman]

On 15/12/2023 01:26, Alex Buckley wrote:
> :
>
> Unfortunately, Guava is still not an explicit module 
> (https://github.com/google/guava/issues/2970). It is an automatic 
> module. This means it gets a "boost" in terms of the modules that it 
> reads. In fact, we think the implementation of module resolution is 
> giving it _too much_ of a boost, because Guava in layer B ends up 
> reading both Gson in layer B and Gson in layer A. Alan is investigating.

Yes, this is about automatic modules in child configurations/layers. The 
computation of the readability graph needs to arrange for automatic 
modules to read modules in parent configurations, it's not taking into 
account the shadowing that arises when a module in the configuration 
under construction has the same name as a module in a parent 
configuration. No issue with explicit modules as their dependences are 
declared, the issue is specific to automatic modules.

-Alan