| Interface | Description | 
|---|---|
| Handler<C extends MessageContext> | The  Handlerinterface
  is the base interface for Jakarta XML Web Services handlers. | 
| HandlerResolver | HandlerResolveris an interface implemented
  by an application to get control over the handler chain
  set on proxy/dispatch objects at the time of their creation. | 
| LogicalHandler<C extends LogicalMessageContext> | The  LogicalHandlerextends
  Handler to provide typesafety for the message context parameter. | 
| LogicalMessageContext | The  LogicalMessageContextinterface extendsMessageContextto
  provide access to a the contained message as a protocol neutral
  LogicalMessage | 
| MessageContext | The interface  MessageContextabstracts the message
 context that is processed by a handler in thehandlemethod. | 
| PortInfo | The  PortInfointerface is used by aHandlerResolverto query information about
  the port it is being asked to create a handler chain for. | 
| Enum | Description | 
|---|---|
| MessageContext.Scope | Property scope. | 
 References in this document to JAX-WS refer to the Jakarta XML Web Services unless otherwise noted.
 References in this document to JAXB refer to the Jakarta XML Binding unless otherwise noted.