The exception actually happens at the "Child.prototype.foo =" part.
On Apr 24, 2:26 pm, [EMAIL PROTECTED] wrote:
> I am having trouble properly extending Java classes with Rhino.
>
> I am using the Mozilla version of Rhino and not the builtin version
> with Java 6.
>
> ------------------------ Java code to extend
> ---------------------------------
> public class Test {
>
> public int value = 4;
>
> public void foo() {
> System.out.println(this.value);
> }
>
> }
>
> ------------------------ Javascript code
> ---------------------------------
>
> // Wrap the Java class into an adapted Javascript constructor
> function Parent() {
> return new JavaAdapter(Test, this);
>
> }
>
> // Define a constructor for Child()
> function Child() {
>
> }
>
> // Copy the parent's prototype into the child prototype
> Child.prototype = new Parent();
>
> // Override the java version of foo()
> Child.prototype.foo = function() {
> this.value = 1;
>
> // call the "super" java version of this method
> Parent.prototype.foo.call(this);
>
> }
>
> // Create an instance and test method
> var t = new Child();
> t.foo(); <------ Exception gets thrown here
>
> ----------- Error message from Rhino ------------------------
>
> Java method "foo" cannot be assigned to. (#14)
>
> This code works when modified to be totally Javascript based. I don't
> believe it's an issue with the Javascript part. Am I going about this
> the wrong way? Is it possible to actually extend Java classes?
>
> Thank you for you help.
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