Subj : Using extends command flag but cannot access inherited fields or methods
To   : netscape.public.mozilla.jseng
From : vwine@yahoo.com (Vaughn)
Date : Tue Apr 22 2003 07:08 pm

Hello,

I'm using the following to compile a script, named TestScript.js:

java -cp ".;js.jar" org.mozilla.javascript.tools.jsc.Main -g -nosource
-extends Son TestScript.js

As you can see, this script extends a class named Son (which extends
Daddy).

I would like to be able to access member data from Son and Daddy
within TestScript, but when I try I always get exceptions (see the
attached source below for details).  Is there something I can do to
get at inherited fields and methods from my script?

Thank you so much for your help!

Vaughn

_________________________

Here are my sources:


--Daddy.java---------------------------------
public class Daddy
{
	public int age = 34;

	public String getEyeColor()
	{
		return "blue";
	}
}

--Son.java---------------------------------
public class Son
extends Daddy
{
	public String favoriteToy = "Buzz Light Year action figure";

	public Son()
	{
		age = 5;
	}

	public Integer getNumToys()
	{
	return new Integer(237);
	}
}


--TestScript.js------------------------
java.lang.System.out.println("Start TestScript");

// The next four lines are bad and cause exception like the following:
// 
// Exception in thread "main" ReferenceError:
//   "getEyeColor" is not defined. (TestScript.js; line 4) 
//         at org.mozilla.javascript.NativeGlobal.constructError(NativeGlobal.java:597)
//         at org.mozilla.javascript.NativeGlobal.constructError(NativeGlobal.java:557)
//         at org.mozilla.javascript.optimizer.OptRuntime.callSimple(OptRuntime.java:254)
//         at TestScript1.call(TestScript.js:4)
//         at TestScript1.exec(TestScript.js)
//         at org.mozilla.javascript.ScriptRuntime.runScript(ScriptRuntime.java:1887)
//         at TestScript.<init>(<adapter>)
//         at Driver.main(Driver.java:5)
//
// My script extends Son, so these SHOULD work!
java.lang.System.out.println("My eye color = " + getEyeColor());
java.lang.System.out.println("My age = " +age);
java.lang.System.out.println("My number of toys = " + getNumToys());
java.lang.System.out.println("My favorite toy = " + favoriteToy);

java.lang.System.out.println("End TestScript");


--Driver.java--------------------------------
public class Driver
{
	public static void main(String[] args)
	{
		TestScript ts = new TestScript();

		// This works if I comment out the "BAD" lines in the script
		System.out.println("Eye color = " + ts.getEyeColor());
		System.out.println("Age = " +ts.age);
		System.out.println("Number of toys = " + ts.getNumToys());
		System.out.println("Favorite toy = " + ts.favoriteToy);
	}
}

.