Subj : Calling host object method with java parameters
To   : netscape.public.mozilla.jseng
From : Janusz Dalecki \(TYCO\)
Date : Wed Jul 20 2005 10:54 am

I am having problem with calling one of my host object method and passing a
java parameter.
I have a host object that I call HOUtil that has a method let's say test
    public void jsFunction_Test(HOTest test)
    {
        Object oo = (  (org.mozilla.javascript.Wrapper) test ).unwrap();
        boolean b = oo instanceof
tycoint.odyssey.response.responseHostObjects.Test;
..
}
The problem I am having is that when I call this function from within java
script passing a Java object Test like this:
                HOUtil.Test(new HOTest("janusz"));
it always fails with the following message :
Caused by: org.mozilla.javascript.EvaluatorException: Unsupported parameter
type "tycoint.odyssey.response.responseHostObjects.HOTest" in method
"jsFunction_Test".
	at
org.mozilla.javascript.DefaultErrorReporter.runtimeError(DefaultErrorReporte
r.java:95)
	at
org.mozilla.javascript.Context.reportRuntimeError(Context.java:1054)
	at
org.mozilla.javascript.Context.reportRuntimeError(Context.java:1110)
	at
org.mozilla.javascript.Context.reportRuntimeError2(Context.java:1080)
	at
org.mozilla.javascript.FunctionObject.<init>(FunctionObject.java:160)
	at
org.mozilla.javascript.ScriptableObject.defineClass(ScriptableObject.java:90
7)
	at
org.mozilla.javascript.ScriptableObject.defineClass(ScriptableObject.java:73
2)
	at
tycoint.odyssey.response.core.util.ResponseBuilder.callScriptFunction(Respon
seBuilder.java:447)
	at
tycoint.odyssey.response.core.util.ResponseBuilder.build(ResponseBuilder.jav
a:110)
	... 13 more
If I understand the rules, first the HOTest object will be converted to Java
Script object JavaObject (in the case of Rihno it is NativeJavaObject), then
when passed to the Host Object HOUtil. Test function it should be converted
to (I quote) "Any interface or class that is assignment-compatible with the
unwrapped object". My HOTest object is compatible with the unwrapped object
because the above code works if I only change the parameter type of the Test
function to be Object like this:
    public void jsFunction_Test(Objectt test)
    {
        Object oo = (  (org.mozilla.javascript.Wrapper) test ).unwrap();
        boolean b = oo instanceof
tycoint.odyssey.response.responseHostObjects.Test;
..
}
What am I confusing here?
Any help appreciated.
Regards,
Janusz

.