Java web service -- how to re-generate Java sources when WSDL changes?

I created a new web service using the "Java Web Service from WSDL" wizard.
Some time later I changed the WSDL and now I need to rebuild the Java sources. What is the best way to do this? I can't re-run the wizard, it returns an error: "The name of this web service is already used by another web service in this project."
Using Jdeveloper 11.1.1.3.0 on Linux.
Thanks.

These links may helpful for you.
http://download.oracle.com/docs/cd/E14004_01/books/SSDev/SSDev_CustomizingModel22.html
http://download.oracle.com/docs/cd/B31017_01/core.1013/b28764/web_services003.htm

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