Re: [xmlvm-users] NSObject dispatchObject

[Panayotis K. <pan...@pa...>]

First of all, thank you Arno for being for one more time helpful.


On May 20, 2011, at 4:18 AM, Arno Puder wrote:

> 
> 
> On 5/19/11 4:35 PM, Panayotis Katsaloulis wrote:
>> I have two questions:
>> 
>> 1)  what is the reason of this variable
>> 
>> static NSObject* dispatchObject = nil;
>> 
>> in the NSObject class of the C backend?
> 
> The C wrapper use this object to call the performSelectorOnMainThread: 
> method on a real Objective-C object.

The reason I ask is because I can not find it anywhere in the code, and probably it is a leftover.


>> 2) I have a JAVA_OBJECT , say "o1"
>> This object, (in java) it has a specific method, let's say
>> public void myMethod(Object val) {..}
>> 
>> How do I call this method from inside C, given I have the pointer o1 of this object?
> 
> It depends if the call is made through an interface type or class type. 
> I suggest that you write a mini-Java program that does this call (in 
> Java) and then cross-compile it with --target=posix. Then you can look 
> at the generated code.

I want to do this in the compatibility library for arbitrary objects, in order to implement a method of an interface, so I don't know in advance what this would be.
Do you believe I should use reflection then?


And a last probably silly question:
How do I convert an ObjC String to java_lang_String ?
(and for completeness and back?)