This seems rather verbose compared to modern J2EE (Java CDI, JAX-WS rest, JPA). Why the need for all the code generation? And the huge "DATA Data Schema and Te

This seems rather verbose compared to modern J2EE (Java CDI, JAX-WS rest, JPA). Why the need for all the code generation? And the huge "DATA Data Schema and Templates"? When you can control serialization thru a set of annotations in fairly standarized manner? I don't understand selling point.