You create a root resource class as a compiled Java class file (*.class). Similarly create a sub resource class or an exception mapping provider as and when required.

You include the compiled Java class file (*.class) in the directories that configure the WAR file. Add the file to either or both of the following locations:

• Under the classes directory
• In the JAR files included in the lib directory

A WAR file must contain at least one root resource class. For details on the storage destination, see 11.3.1 Configuring a WAR file.