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A SOAP-based web service can be implemented as a single java class. An endpoint interface, also known as a service endpoint interface (SEI), is a term used in Java Platform, Enterprise Edition when exposing Enterprise JavaBeans as a Web service (see also Service Implementation Bean (SIB)). It is annotated with codice_1 and is a component interface, which declares all the abstract methods that are exposed to the client. As it extends the codice_2 interface, all methods must throw the codice_3. A Web service client accesses a stateless session bean through the bean's Web service endpoint interface. Like a remote interface, a Web service endpoint interface defines the business methods of the bean.