Originally reportFromPlugin method was introduced to address the problem
with loading of DefaultErrorMessages.Extension vis ServiceLoader.
For some cases this extension was not loaded by ServiceLoader because
classes was loaded via different class loader, common scenario here is
compiler plugins. Ideally we should load such extension point via
getService approach, but unfortunately to do that we need project and
DefaultErrorMessages.render is static method for now.
Also with reportFromPlugin approach is a problem -- all diagnostics
reported via this method has the same id: PLUGIN_[WARNING|ERROR|INFO]
and it isn't possible to suppress only one particular diagnostic.
To bypass this problem the new method
initializeFactoryNamesAndDefaultErrorMessages was introduced.
It basically store DiagnosticRenderer inside DiagnosticFactory.
It is not ideal, because one DiagnosticFactory could have different
renderers for different scenarios -- for compiler and for IDE, but
I think that it is better than reportByPlugin approach.
Stanislav Erokhin
453008e488