Extending an Existing Instantiated Object and ClassCastException

Question

I am trying to wrap a class around an object that is returned from a third party.
"Requirement" is a class that extends "Dispatch". "Dispatch" is a class that is returned from the third party.
I am getting a class ClassCastException error.
requirement = (Requirement) Dispatch.call(terms, "Item", i+1, 3).toDispatch();
I thought that I could do this.. What is the problem?
Example below.
Requirement requirement;
for (int i=0;i<cnt;i++) {
requirement = (Requirement) Dispatch.call(terms, "Item", i+1, 3).toDispatch();
System.out.println(i + " " + requirement.getText());
}The Requirement class extends Dispatch.
public class Requirement extends Dispatch {
     boolean initialized = false;
     String name;
     String text;
...The error that I am getting is:
Exception in thread "main" java.lang.ClassCastException: com.jacob.com.Dispatch cannot be cast to com.sita.reqpro.Requirement
     at com.sita.reqpro.EasyRqmt.main(EasyRqmt.java:49)
I'm using: jdk1.5.0_12

Answer 1

So what is the best way to do this?
Something like this:
Dispatch item = null;
Requirement requirement;
     for (int i=0;i<cnt;i++) {
     item = Dispatch.call(terms, "Item", i+1, 3).toDispatch();
     requirement = new Requirement(item);
     System.out.println(i + " " + requirement.getText());
public class Requirement {
     Dispatch dispatch;
     boolean initialized = false;
     String name;
     String text;
     public Requirement(Dispatch pDispatch) {
          name = Dispatch.get(pDispatch, "Name").toString();
          text = Dispatch.get(pDispatch, "Text").toString();
          initialized = true;
     }