Here is a start...
Class barClass = com.example.Bar.class;
Method m = barClass.getMethod("foo", ...) // add parameter types to
call
Object val = m.invoke(null, ...) // add parameter values to call
On Jan 2, 12:10 pm, Philip <[email protected]> wrote:
>
> 2. I am trying to replicate the easy functionality of the
> NSClassFromString method. Basically, if I have a string for a full
> qualified class name, what is the best way to invoke a static method
> with a known signature for that class.
>
> In objective c:
>
> Class foo()
> {
> NSString *r = @"Bar";
> Class c = NSClassFromString(r);
> return c;
>
> }
>
> then you can call method sna() on class Bar with [foo() sna:d]
>
> So far in Java using reflection, I came up with this convoluted code
> that doesn't replicate the behavior for the parameters for the
> function (I pass back the object reference, not the method back,
> therefore I also have to pass the parameter to call the method):
>
> static SuperClassOfBar foo(float d) {
> try {
> String r = "Bar";
> Class c = Class.forName("com.example."+r); // Fully
> qualified name for class
> Class partypes[] = new Class[1];
> partypes[0] = Float.TYPE;
> Method m = c.getDeclaredMethod("sna", partypes);
> Object arglist[] = new Object[1];
> arglist[0] = d;
> Object o = m.invoke(null, arglist);
> return SuperClassOfBar.class.cast(o);
> } catch (Exception e) {
> return null;
> }
>
> It works but it's heavy and not pretty. I understand that leaving a
> dynamic language like objective c , I have to make some compromises,
> but I may miss something about Java for not having found something
> more lightweight for such a generic programming functionality. Any
> suggestions to simplify this implementation are welcome.
>
> Thanks in advance.
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