Package java.lang.reflect

Interface InvocationHandler

All Known Implementing Classes:

AnnotationFactory

public interface InvocationHandler

Implementors of this interface dispatch methods invoked on proxy instances.

See Also:

Proxy

Method Summary

Modifier and Type	Method	Description
Object	invoke(Object proxy, Method method, Object[] args)	Handles the method which was originally invoked on the proxy instance.

Method Details

invoke

Object invoke(Object proxy,
Method method,
Object[] args)
       throws Throwable

Handles the method which was originally invoked on the proxy instance. A typical usage pattern follows below:

 public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
     //do some processing before the method invocation

     //invoke the method
     Object result = method.invoke(proxy, args);

     //do some processing after the method invocation
     return result;
 }

Parameters:

proxy - the proxy instance on which the method was invoked

method - the method invoked on the proxy instance

args - an array of objects containing the parameters passed to the method, or null if no arguments are expected. Primitive types are boxed.

Returns:

the result of executing the method. Primitive types are boxed.

Throws:

Throwable - the exception to throw from the invoked method on the proxy. The exception must match one of the declared exception types of the invoked method or any unchecked exception type. If not then an UndeclaredThrowableException is thrown