[Web Service] creazione di un Dynamic Proxy

[peppespe]

Ho un problema con la creazione di un client per un web service mediante Dynamic Proxy. In breve:

1. Ho creato un semplice web service Calculator.jws

public class Calculator{
    public int add(int i1, int i2){
        return i1+i2;
    }
    public int subtract(int i1, int i2){
        return i1-i2;
    }
}

2. sono riuscito a compilarlo e quindi a creare il suo descrittore

http://localhost:8080/axis/Calculator.jws?wsdl

3. ho scritto il seguente client:

/* CalculatorClient – usando Dynamic Proxy*/

import javax.xml.namespace.QName;
import javax.xml.rpc.*;

public class CalculatorClient {
    public static void main(String [] args) {
        try {
                  String wsdlUrl = "http://localhost:8080/axis/Calculator.jws?wsdl";
                  String nameSpaceUri = "http://localhost:8080/axis/Calculator.jws";
                  String serviceName = "CalculatorService";
                  String portName = "Calculator";
                  ServiceFactory serviceFactory = ServiceFactory.newInstance();
                  Service afs = serviceFactory.createService(new java.net.URL(wsdlUrl), new QName(nameSpaceUri, serviceName));
                  CalculatorServiceIntf afsIntf = (CalculatorServiceIntf)afs.getPort(new QName(nameSpaceUri, portName), CalculatorServiceIntf.class);
                  System.out.println("addInt(5, 3) = " + afsIntf.add(5, 3));
              } catch (Exception e) {
                  System.err.println("Execution failed. Exception: " + e);
              }
    }
}

e come immaginavo la riga

CalculatorServiceIntf afsIntf = (CalculatorServiceIntf)afs.getPort(new QName(nameSpaceUri, portName), CalculatorServiceIntf.class);

mi ha sollevato il seguente errore:

C:\projects\Calculator>javac CalculatorClient.java
CalculatorClient.java:14: cannot find symbol
symbol  : class CalculatorServiceIntf
location: class CalculatorClient
                        CalculatorServiceIntf afsIntf = (CalculatorServiceIntf)afs.getPort(
                        ^
CalculatorClient.java:14: cannot find symbol
symbol  : class CalculatorServiceIntf
location: class CalculatorClient
                        CalculatorServiceIntf afsIntf = (CalculatorServiceIntf)afs.getPort(
                                                         ^
CalculatorClient.java:15: cannot find symbol
symbol  : class CalculatorServiceIntf
location: class CalculatorClient
                        new QName(nameSpaceUri, portName),CalculatorServiceIntf
.class);
                                                           ^
3 errors

P.S. Tengo a precisare che tale esempio l'ho trovato in rete e non ho fatto altro che copiare il tutto e non sono a conoscenza di cosa è la classe mancante.