Packing custom vaadin widget and ready to be used directly

HI, this is more of a question to generate a vaadin.jar like package that allows us to precompile our component from GWT compiler and use it directly in another project without recompile it everytime.

with Vaadin release jar files, you don't have to recompile these Vaadin component if you are not creating or extending client side component. We want to konw if the add-on jar is the one we are looking for or we should go with Widget jar? although some try has shown it is not working .

By the way , it is maven we are using.