import java.lang.reflect.Proxy;
import java.lang.reflect.InvocationHandler;
 
/**
 * CallInterceptionExampleProxyFactory - the dumbest proxy factory ever invented.  Instantiate it with an
 * invocation handler and ask it.  We'll get a simple proxy for that invocation handler.  Remember our 
 * invocation handler instances are associated with a concrete class.
 */ 
 public class CallInterceptionExampleProxyFactory {
  private InvocationHandler invocationHandler = null;

  public CallInterceptionExampleProxyFactory(InvocationHandler ih) {
    this.invocationHandler = ih;
  }

  public Object createProxy( Class intrface ) {
    Class[] interfaces = new Class[] { intrface };
    InvocationHandler ih = this.invocationHandler;
    //we'll also discuss classloaders some other time
    Object proxy = Proxy.newProxyInstance( this.getClass().getClassLoader(), 
                                           interfaces,
                                           ih);
    return proxy;
  }
 }