Java Development Tools

Dear All

I am new with ADF mobile Application

I have created a web service that has a method "AuthenticateUser". And I deployed it successfully to WLS.

Then I created a new mobile adf mobile application and I created a web service data control(SOAP/REST)

I created a taskflow and added new view activity "login.amx"

I dragged and dropped the operation "AuthenticateUser" from my data control to the login page as a parameter form.

I run deployed the application to the emulator and it owrks fine and every thing is OK.

Now I have a requirement to access the "AuthenticateUser" Operation from my managed bean.

I tried to implement this method as follow

public String authenicateUser(){
String output  = "fail";
DCBindingContainer dc = getBindingContainer();
OperationBinding opr = dc.getOperationBinding("AuthenticateUser");
opr.execute();
output = (String)opr.getResult();
return output;

}

Is this code is correct? Is it possible to access the OperationBinding through this way.

Olease correct me.

I run the application and When I pressed the button I faces an error .