Subj : Re: creating JS objects in Java...?
To   : netscape.public.mozilla.jseng
From : user
Date : Thu Feb 17 2005 05:14 pm

getting there.
i think i compiled the class, now I have to do something with the bytes 
I just got back.  Do i need to define my own ClassLoader subclass?

here's what i've got so far.  How's it look?


CompilerEnvirons ce = new CompilerEnvirons();
ce.initFromContext(mJsContext);
ClassCompiler cc = new ClassCompiler(ce);
cc.setMainMethodClass("MyCoolNewClass");
cc.setTargetExtends(Module.class);

Class[] interfaces = {NamedObject.class};
cc.setTargetImplements(interfaces);

String js = "function 
Start(){Packages.java.lang.System.err.println(this);} function 
GetName(){return this.toString();} function GetNamedChild(){return null;}";
Object[] objs = cc.compileToClassFiles(js, "script", 1, "MyCoolNewClass");


-denny-


user@domain.invalid wrote:

> that's exactly perfect!
> Thank you!
> 
> I don't really need the class files as actual files, but maybe it's an 
> interesting optimization to store them away and use the later...
> 
> I've been looking at the javadocs and I can see roughly what's going on. 
>  Are there any examples anywhere where someone is doing this?  I did a 
> google search and didn't come up with much.
> 
> thanks again - it's perfect.  now if I can just figure out how it works...
> 
> =)
> -denny-
> 
> 
> 
> 
> Igor Bukanov wrote:
> 
>> user@domain.invalid wrote:
>>
>>> So, if I use the JavaAdapter to make c new javascript class that 
>>> inherits from another class an implements a few interfaces, if I use 
>>> the Rhino API to get a hold of that object in Java, can I use it 
>>> right then and there as an object of those interface types?  Or do I 
>>> have to use it as such only in the JS context?
>>>
>>> Here's what I want to do:  I have an engine that takes Module 
>>> objects. Many of these Module objects have been overwritten in Java - 
>>> EmailModule, etc.  I would like to be able to have the user author 
>>> his own Module using JavaScript, using, presumably, the JavaAdapter.
>>>
>>> This authoring is done in a little gui.  Say that I have an interface 
>>> Foo which has an method Bar() that I want to overwrite.  So, in this 
>>> gui he writes "function Bar(){print("HelloWorld");}".  Now, -in Java- 
>>> how do I make this Module object with this code overloading the 
>>> superclass method Bar() such that I then have a Java Module object 
>>> that I can pass around my Java API?
>>>
>>> Basically, I want a Java function (not a JS function) like this:
>>>
>>> public Module BuildSubclass(String[] superclasses, String iBarJSCode, 
>>> String iSomeOtherMethodJSCode,...)
>>> {
>>>     Module m = new JavaAdapter(superclasses, iBArJSCode, 
>>> iSomeOtherMethodJSCode);
>>>
>>> return m;
>>> }
>>>
>>> Now I have a Module object that extends or implements an arbitrary 
>>> number of classes or interfaces and who has various overloaded methods.
>>>
>>>
>>> How do I do this? I would be incredibly grateful for some help.
>>
>>
>>
>> Use class compiler,
>> http://www.mozilla.org/rhino/apidocs/org/mozilla/javascript/optimizer/ClassCompiler.html 
>>
>> to compile you class to bytecode sublassing the desired class, load 
>> the generated bytecode into a class loader and instantiate the 
>> resulting class.
>>
>> Regards, Igor
> 
>

.