Passing input of type AbstractList to RFC

Hi All,

          I am trying to pass List(java.util.List) as input to RFC which takes input of type AbstractList. While setting input I am casting it to Abstract as below:

public java.lang.String executeRFC( boolean executeflag, java.util.List orderlist)

{

modelinput inputElement =new modelinput();

inputElement.setIt_exec(executeflag);

inputElement.setIt_orders((AbstractList) orderlist); //casting Llist to AbstractList.

//...and binding the inputs and execute RFC code.... //

}

Above code shows no compile time errors. But when I run the app I am getting the below error. Any help would be greatfull.

java.lang.ClassCastException: Cannot cast class java.util.ArrayList to class com.sap.aii.proxy.framework.core.AbstractList

thanks,

Nooruddin