How to provide specific implementations of GWT

Question

Suppose I am working on exposing some of my server classes to a GWT application, but some parts could be made much better using GWT-specific components (e.g. JSNI).

What are some methods for doing this without being too hacks?

For example, I know the use of the subpacket and the use of the <super-source/> , but this requires the package names to be different, which makes eclipse complain. A common solution in the community is then to tell eclipse to use this as the source folder, but then the eclipse complains that there are two classes with the same name.

Ideally, there is only a way to store everything in one source tree and actually have different classes that use alternative implementations. It will be like a more OO approach.

I would like to add a suffix to a class like _gwt that does this automatically, and I know that I could write a script to do this conversion, but that certainly means kludge.

I was considering using the Google GIN / GUICE libraries for my projects in general, and I think there might be some solution, but I'm not sure, because I did not study it thoroughly.

What solutions have you tried to use in the past in GWT projects?

Answer 1

The easiest way to have separate implementations is to use super-source code, but enough to create an instance with a unique name or send another method. In the ideal case, the superuser implementation is performed in just a few lines, and it is not so bad that you cannot manually roll it.

To get around the Eclipse / javac dual mapping problems and the package name, the GWT source uses two top-level roots for the user code: user / src and user / super. For example, AutoBeans has a separate implementation for citing and evaluating JSON, one for the JVM and one for the browser .

There is actually no non-kludgy way to implement a super-source, as it is a function that goes beyond what you can specify in the language. Nothing allows you to say “use this implementation in this environment” without using any external tool.