import java.lang.reflect.*;

/**
 * DynamicBeanProxy2 is an alternate version of DynamicBeanProxy that reuses the
 * BeanProxy class.
 *
 * @author Thornton Rose
 */
public class DynamicBeanProxy2 {
   
   // newProxyInstance(Class):
   /**
    * Create new proxy instance for given class.
    */
   public static IBeanProxy newProxyInstance(Class theBeanClass) throws Exception {
      return (IBeanProxy) Proxy.newProxyInstance(
         theBeanClass.getClassLoader(), 
         new Class[] { IBeanProxy.class }, 
         new BeanProxyInvocationHandler(theBeanClass));
   }

   // newProxyInstance(Object):
   /**
    * Create new proxy instance for given object.
    */
   public static IBeanProxy newProxyInstance(Object theBean) throws Exception {
      IBeanProxy proxy = newProxyInstance(theBean.getClass());
      proxy.setBean(theBean);
      return proxy;
   }

   /**
    * BeanProxyInvocationHandler is the invocation handler for method 
    * invocations on dynamic bean proxies (implementations of IBeanProxy).
    */
   protected static class BeanProxyInvocationHandler implements InvocationHandler {
      private BeanProxy beanProxy;

      // BeanProxyInvocationHandler(Class):
      /**
       * Create a new BeanProxyInvocationHandler for the given class.
       */
      public BeanProxyInvocationHandler(Class theBeanClass) throws Exception {
         beanProxy = new BeanProxy(theBeanClass);
      }

      // invoke(Object, Method, Object[]):
      /**
       * Handle invocation of the given method for the given proxy.
       */
      public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
         return method.invoke(beanProxy, args);
      }
   }
}