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- All Known Implementing Classes:
- CompositeDataInvocationHandler,- EventHandler,- MBeanServerInvocationHandler,- RemoteObjectInvocationHandler
 
 public interface InvocationHandlerInvocationHandleris the interface implemented by the invocation handler of a proxy instance.Each proxy instance has an associated invocation handler. When a method is invoked on a proxy instance, the method invocation is encoded and dispatched to the invokemethod of its invocation handler.- Since:
- 1.3
- See Also:
- Proxy
 
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Method SummaryAll Methods Instance Methods Abstract Methods Modifier and Type Method Description Objectinvoke(Object proxy, Method method, Object[] args)Processes a method invocation on a proxy instance and returns the result.
 
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Method Detail- 
invokeObject invoke(Object proxy, Method method, Object[] args) throws Throwable Processes a method invocation on a proxy instance and returns the result. This method will be invoked on an invocation handler when a method is invoked on a proxy instance that it is associated with.- Parameters:
- proxy- the proxy instance that the method was invoked on
- method- the- Methodinstance corresponding to the interface method invoked on the proxy instance. The declaring class of the- Methodobject will be the interface that the method was declared in, which may be a superinterface of the proxy interface that the proxy class inherits the method through.
- args- an array of objects containing the values of the arguments passed in the method invocation on the proxy instance, or- nullif interface method takes no arguments. Arguments of primitive types are wrapped in instances of the appropriate primitive wrapper class, such as- java.lang.Integeror- java.lang.Boolean.
- Returns:
- the value to return from the method invocation on the
 proxy instance.  If the declared return type of the interface
 method is a primitive type, then the value returned by
 this method must be an instance of the corresponding primitive
 wrapper class; otherwise, it must be a type assignable to the
 declared return type.  If the value returned by this method is
 nulland the interface method's return type is primitive, then aNullPointerExceptionwill be thrown by the method invocation on the proxy instance. If the value returned by this method is otherwise not compatible with the interface method's declared return type as described above, aClassCastExceptionwill be thrown by the method invocation on the proxy instance.
- Throws:
- Throwable- the exception to throw from the method invocation on the proxy instance. The exception's type must be assignable either to any of the exception types declared in the- throwsclause of the interface method or to the unchecked exception types- java.lang.RuntimeExceptionor- java.lang.Error. If a checked exception is thrown by this method that is not assignable to any of the exception types declared in the- throwsclause of the interface method, then an- UndeclaredThrowableExceptioncontaining the exception that was thrown by this method will be thrown by the method invocation on the proxy instance.
- See Also:
- UndeclaredThrowableException
 
 
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