Simplify DefaultCoder #18462
Description
DefaultCoder is too hard to use - it requires having a CoderProvider class and a bunch of other boilerplate. It should have simpler usage modes, e.g. @defaultcoder(FooCoder.class) class Foo should simply work if FooCoder only has a "static FooCoder of()" method, or "of(TypeDescriptor)" for more complex use cases (eg generics).
Imported from Jira BEAM-2754. Original Jira may contain additional context.
Reported by: jkff.