[Jython-users] Calling overloaded methods of a java-subclass within python?

[Martin <m.m...@gm...>]

hi,

i pass a java-object to very simple python-script. The scripts manipulate
this object.
Now i had to extend this java-object, and i handle this objects in other
python scripts, but further passing the object as the superclass.
In the extended Class i added 2 Methodes and overloaded another one.
Now i get 
TypeError:
- args; got 5 update(): expected 1 or 4

update() is the overload  method, wich have now 5 parameter.
The strange thing is the other two methods are called correct.

def do_stuff():
    global java_object
    # getSpecialValue1() &2 are declared in the subclass of java_object,
that works !
    value1=java_object.specialValue1
    value2=java_object.specialValue2
    value3=java_object.value1
    #update(double,double,double,double,double) is overloaded from
Java_Object
    # that fails 
    java_object.update(value1,value2,value3,value2+value1,value2-value3)

Just a sketch of the classes and methods:

class Java_Object{
 public double getValue1(){return -1;}
 public double getValue2(){return -1;}
 public void (Object o)
 public void update(double a, double b, double c, double d){//do stuff}
}

class Java_Object2 extends Java_Object{
 //new method
 public double getSpecialValue1(){return -1;}
 //new method
 public double getSpecialValue1(){return -1;}
 // 5 parameter instead 4
 public void update(double a, double b, double c, double d, double z){//do
stuff}
}

//main point für script processing
public void invokeScript(String function, Java_Object java_object){
 pythonInterpreter.set("java_object",java_object)
 pythonInterpreter.exec(function) 
}

I've read that jython get confused with different method signatures, but
only examples how to call methods of the super class, i want to call a method of
a subclass.
In java i would cast java_object to Java_Object2, but python have no concept
of casting(AFAIK). So what can i do?

any help, or pointers to documention & examples are very appreciated. 

-- 

Martin Möbius