Casting DataHandler to complex user type.

Question

Hi guys,
I am beginner and I have met a problem during invoking my Web Service. To create and run it I have used Axis2 v 1.4, Eclipse tools and Tomcat 6. I found out the problem are complex invoking parameters because when I run simple WS with basic type parameter like String everything works fine.
What is wrong with my implementation?
Service class:
public class AccessLevelService implements AccessLevelContract {
     private AccessLevelDAO accessLevelDAO;
     public AccessLevelService() {
          String [] path = {"com/applicationContext.xml"};
          ApplicationContext applicationContext = new ClassPathXmlApplicationContext(path);
          accessLevelDAO = (AccessLevelDAO) applicationContext.getBean("accessLevelDAO");
     @Override
     public void add(AccessLevel entity) {
          accessLevelDAO.add(entity);
     @Override
     public List<AccessLevel> getAll() {
          return accessLevelDAO.getList(new AccessLevel());
     @Override
     public void modify(AccessLevel entity) {
          accessLevelDAO.modify(entity);
     @Override
     public void remove(AccessLevel entity) {
          accessLevelDAO.remove(entity);
}Here is my AccessLevel class:
public class AccessLevel implements Serializable{
     private int id;
     private String level;
     public AccessLevel() {
     public AccessLevel(String level) {
          this.level = level;
     public int getId() {
          return id;
     public void setId(int id) {
          this.id = id;
     public String getLevel() {
          return level;
     public void setLevel(String level) {
          this.level = level;
}Exception:
[ERROR] javax.activation.DataHandler cannot be cast to com.rejkowicz.dataobject.AccessLevel
java.lang.ClassCastException: javax.activation.DataHandler cannot be cast to com.rejkowicz.dataobject.AccessLevel
     at com.rejkowicz.ws.AccessLevelService.add(AccessLevelService.java:1)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
     at java.lang.reflect.Method.invoke(Method.java:597)
     at org.apache.axis2.rpc.receivers.RPCUtil.invokeServiceClass(RPCUtil.java:194)
     at org.apache.axis2.rpc.receivers.RPCInOnlyMessageReceiver.invokeBusinessLogic(RPCInOnlyMessageReceiver.java:63)
     at org.apache.axis2.receivers.AbstractMessageReceiver.receive(AbstractMessageReceiver.java:100)
     at org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:176)
     at org.apache.axis2.transport.http.HTTPTransportUtils.processHTTPPostRequest(HTTPTransportUtils.java:275)
     at org.apache.axis2.transport.http.AxisServlet.doPost(AxisServlet.java:133)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
     at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
     at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:852)
     at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
     at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
     at java.lang.Thread.run(Thread.java:619)
[ERROR] org.apache.axis2.AxisFault: javax.activation.DataHandler cannot be cast to com.rejkowicz.dataobject.AccessLevelBy,
Luke

Answer 1

Matthew,
Edward has the right approach, though somewhere you two mis-communicated.
You can create either a dynamic or static LOV within HTML DB that is not part of the "database end".
If I'm understanding what you are saying correctly, using a static LOV (where within HTML DB you define the 4='Temp" relationship), on the form itself you'd basically be saying:
select temp display_field, type_code return_value from your_LOV.
HTML DB's LOV will display pretty much whatever you want (the display_field), and then return pretty much whatever you want (the return_value). Sometime's it's a little limited, only showing the one display_field, but you can sometimes work around it with some decode and concatenation.
So, if you define a static LOV where you define the display value 'Temp' returns the number 4, everything should work fine.
Bill Ferguson