使用返回自定义类型的函数创建Web服务（JAX-WS）

Question

I read many threads about this issue and i did find some that deal with it - but unfortunately I couldn't really understand how to solve my problem.

Right now i'm creating WebService (using Tomcat 7), and I want to share interfaces. I have about 8 interfaces that relate to each other. for example:

@WebService
@SOAPBinding(style = Style.RPC)
interface A {
  public String method1();
}

@WebService
@SOAPBinding(style = Style.RPC)
interface B {
  public String method1();
  public A getA();
}

@WebService
@SOAPBinding(style = Style.RPC)
interface C {
  public A getA();
  public B getB();
}

The problem is that after i create the WAR (for interface C) file and i'm trying to deploy the webservice in tomcat, I get an error from tomcat which looks like that:

SEVERE: WSSERVLET11: failed to parse runtime descriptor: com.sun.xml.ws.spi.db.DatabindingException: com.sun.xml.bind.v2.runtime.IllegalAnnotationsException: 1 counts of IllegalAnnotationExceptions com.mkyong.ws.ITest is an interface, and JAXB can't handle interfaces. this problem is related to the following location: at com.mkyong.ws.ITest

com.sun.xml.ws.spi.db.DatabindingException: com.sun.xml.bind.v2.runtime.IllegalAnnotationsException: 1 counts of IllegalAnnotationExceptions com.mkyong.ws.ITest is an interface, and JAXB can't handle interfaces. this problem is related to the following location: at com.mkyong.ws.ITest

Does anyone have an idea how to solve it? Thanks.

Answer 1

You cannot return an interface type using JAX-WS. Return-types and parameters must be an actual class. RMI would support interfaces for that. JAX-WS doesn't.