How do we do TypeMapping for Vector, Hashtable, or any java data structure in RPC?

Question

I tried to implement a dynamic Client (RPC) however I got the following Error
when I ran the program.
Exception in thread "main" java.lang.ClassCastException
Here is my part of code
//create service
Service service = factory.createService( serviceName );
TypeMappingRegistry registry = service.getTypeMappingRegistry();
TypeMapping mapping = registry.getTypeMapping(
SOAPConstants.URI_NS_SOAP_ENCODING );
mapping.register( Vector.class,                          
          new QName( targetNamespace, "Vector" ),      
          new language_builtins.util.VectorCodec(),                         new language_builtins.util.VectorCodec()
//create call
Call call = service.createCall();
//set port and operation name
call.setPortTypeName( portName );
call.setOperationName( operationName );
call.addParameter( "string",new QName( "http://www.w3.org/2001/XMLSchema","string"
ParameterMode.IN);
call.addParameter( "intVal",new QName( "http://www.w3.org/2001/XMLSchema","int"
ParameterMode.IN);
call.setReturnType( new QName( targetNamespace, "Vector" ) );
Vector v = (Vector) call.invoke(new Object[] {"Hi", new Integer(1) });
Any help on this will be greatly appreciated.
december

Answer 1

Hey December,
I looked at your WSDL, but it doesn't give any hint of what you are putting in
the LinkedList or Vector. All it says is that an "array of anything" (basically,
an array of java.lang.Object) is returned from the buy and sell web service operations.
Surely there is some complexType (i.e. TradeResults, TransactionResults, etc.)
that you want to return here. A java.util.LinkedList object is not a complexType.
It's a generic container object which is specific to the Java programming language.
Same with the java.util.Vector. Web services are programming language independent,
so a .NET client (written in C# or VB code) wouldn't really know how to deal with
a java.util.LinkedList, right? Web services do not transfer objects back and forth,
just XML. This means that the buy web service operation doesn't really return
a java.util.Vector over an HTTP connection. It returns an XML representation of
the "hierarchical state" associated with the complexTypes you put in the Vector,
inside the "service implementation" code on the server side.
What you want to do is use the WSDL "to describe" the data types your web services
accepts and returns. To do this, you'll need to define complexTypes to put in
the array of complex types that is returned. If you leave things as they are,
I don't think you'll ever be able to determine what's in "the Vector". Again,
this is because web services don't transfer objects back and forth, just the state
that is used to instanciate them :-)
HTH,
Mike Wooten
"december_i" <[email protected]> wrote:
>
>
>
Hi Michael Wooten,
When I printed out the Object class name, it returned this "[Ljava.lang.Object;"
So I tried this way again.
Object[] obj = (Object[])call.invoke(new Object[] {"Hi", new Integer(1)});
System.out.println("obj[0].getClass().getName()=" + obj[0].getClass().getName());
At this time, it printed this "java.lang.String".
I guess web services is not returning Vector.
I attached my WSDL file.
I really appreciated your help.
best wishes,
December
"Michael Wooten" <[email protected]> wrote:
If you are still getting a class cast exception, maybe it's becausethe
web service
isn't returning a Vector.
Change the following line in your client code:
Vector v = (Vector) call.invoke(new Object[] {"Hi", new Integer(1)});
to:
Object obj = call.invoke(new Object[] {"Hi", new Integer(1)});
System.out.println("obj.getClass().getName()=" + obj.getClass().getName());
That way you can see what the return type is :-)
You might want to post the WSDL and remote interface of the web service
you are
trying to call also.
Regards,
Mike Wooten
"december_i" <[email protected]> wrote:
Hi Mike Wooten,
Thanks for pointing out my mistake.
However I'm still getting same error. I know i'm gettting this error
because of
return type "Vector". But I don't know what I did wrong.
Does anybody have any sample example about TypeMapping for any datastructures?
Any help on this will be greatly appreciated.
December
"Michael Wooten" <[email protected]> wrote:
Hi December_i,
Your code is saying that the "Vector" type is in the target namespace
for your
web service. I don't think this is correct. Try this:
mapping.register(
java.util.Vector.class,                          
new QName("java:language_builtins.util", "Vector" ),      
new language_builtins.util.VectorCodec(),
new language_builtins.util.VectorCodec()
call.setReturnType( new QName("java:language_builtins.util", "Vector"
HTH,
Mike Wooten
"december_i" <[email protected]> wrote:
I tried to implement a dynamic Client (RPC) however I got the following
Error
when I ran the program.
Exception in thread "main" java.lang.ClassCastException
Here is my part of code
//create service
Service service = factory.createService( serviceName );
TypeMappingRegistry registry = service.getTypeMappingRegistry();
TypeMapping mapping = registry.getTypeMapping(
SOAPConstants.URI_NS_SOAP_ENCODING
mapping.register( Vector.class,                          
          new QName( targetNamespace, "Vector" ),      
          new language_builtins.util.VectorCodec(),                         new language_builtins.util.VectorCodec()
//create call
Call call = service.createCall();
//set port and operation name
call.setPortTypeName( portName );
call.setOperationName( operationName );
call.addParameter( "string",new QName( "http://www.w3.org/2001/XMLSchema","string"
ParameterMode.IN);
call.addParameter( "intVal",new QName( "http://www.w3.org/2001/XMLSchema","int"
ParameterMode.IN);
call.setReturnType( new QName( targetNamespace, "Vector" ) );
Vector v = (Vector) call.invoke(new Object[] {"Hi", new Integer(1)
Any help on this will be greatly appreciated.
december