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Groups > comp.lang.java.programmer > #11845

Dynamic method invocation on Proxy object?

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How can I dynamically invoke a method on a Proxy, where the method 
belongs to one of the proxied interfaces?

Normally (i. e. in the non-proxy case), one would do something like this:

protected Object invokeDelegated( Method m, Object[] args,
                                   Object delegate ) throws Exception
{
   // m is a method from an interface that is not implemented by delegate
   // find the corresponding method in delegate interface and invoke
   Class<?>[] parameterTypes = new Class[args.length];
   for( int i = 0; i < args.length; i++ ) {
     parameterTypes[i] = args[i].getClass();
   }
   Method meth = delegate.getClass().getMethod( m.getName(),
                                                parameterTypes );
   return meth.invoke( delegate, args );
}

However, when delegate is itself a proxy, then delegate.getClass() will 
give me Proxy, which is not what I'm looking for. How can I dynamically 
invoke the methods in the proxied interfaces?

-- Sebastian

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Thread

Dynamic method invocation on Proxy object? Sebastian <sebastian@undisclosed.invalid> - 2012-02-08 09:19 +0100
  Re: Dynamic method invocation on Proxy object? Steven Simpson <ss@domain.invalid> - 2012-02-08 10:34 +0000
    Re: Dynamic method invocation on Proxy object? Sebastian <sebastian@undisclosed.invalid> - 2012-02-08 15:16 +0100

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