This is just an empty implementation of UnavailableServiceException. This class is used in the class org.nasutekds.quicksetup.webstart.WebstartDownloader. We have chosen to do this because we we require the JNLP API to be compiled but the location of the javaws.jar depends on the java distribution, so instead of trying to figure out where javaws.jar is on the java distribution that is being used to compile the source, we just add these classes to the build-tools.jar file that will be used to compile que QuickSetup. It must be noted that the class org.nasutekds.quicksetup.webstart.WebstartDownloader will be only executed in the context of a Java Web Start application and that in this case the javaws.jar will be provided by the Java Web Start Runtime environment. So we are not providing the javaws-stub.jar during runtime: it is used only for compilation.
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