here it is ...
1) I take aan object
2) get its interfaces using reflection
3) get the interfaces those interfaces extend (if any)
4) until I find an interface that extends Remote
5) and that's the one I use to create the name of the stub
it gives a little screenoutput with how long it takes to come up with the
name. On my machine (P3 whatever) it takes <1 (0) millis.
Rob van Oostrum wrote:
> hang on I'll do a quick-and-dirty benchmark. I've done scarier things with
> reflection than this, and I wouldn't categorize them as "extremely" slow.
> I suspect just looking up an implemented interface shouldn't cause too
> much problems
>
> Stefan Bodewig wrote:
>
> > Rob van Oostrum <[EMAIL PROTECTED]> wrote:
> >
> > > I'm not 100% sure on this, but I thought the convention is to always
> > > call your implementation InterfaceNameImpl. If this is true, you
> > > could just do a straight-forward text treatment and drop de Impl
> > > from the implementation class.
> >
> > Possible, but I wouldn't want to rely on this. I fear using
> > reflection here would be extremely slow.
> >
> > Stefan
import java.rmi.Remote;
public class ReflectionTest
{
public static void main( String args[] )
{
FooImpl myFoo = new FooImpl();
long begin = System.currentTimeMillis();
String stubName = getStubName( myFoo );
long duration = System.currentTimeMillis() - begin;
System.out.println( stubName + " in " + duration + " millis." );
}
public static String getStubName( Object object )
{
Class[] interfaces = object.getClass().getInterfaces();
for ( int i = 0; i < interfaces.length; i++ )
{
Class[] extendedInterfaces = interfaces[i].getInterfaces();
for ( int j = 0; j < extendedInterfaces.length; j++ )
{
if ( extendedInterfaces[j].equals( Remote.class ) )
{
return ( interfaces[i].toString() + "_Stub" );
}
}
}
return null;
}
}
import java.rmi.Remote;
public interface Foo extends Remote
{
}
Êþº¾ -
<init> ()V Code LineNumberTable LocalVariableTable this
LFooImpl;
SourceFile FooImpl.java
FooImpl java/lang/Object Foo ! / *· ±
public class FooImpl implements Foo
{
}
ReflectionTest.class
Êþº¾ -
SourceFile Foo.java Foo java/lang/Object java/rmi/Remote
