public interface JaasAuthenticationCallbackHandlerThe JaasAuthenticationCallbackHandler is similar to the javax.security.auth.callback.CallbackHandler interface in that it defines a handle method. The JaasAuthenticationCallbackHandler is only asked to handle one Callback instance at time rather than an array of all Callbacks, as the javax... CallbackHandler defines.
Before a JaasAuthenticationCallbackHandler is asked to 'handle' any callbacks, it is first passed the Authentication object that the login attempt is for. NOTE: The Authentication object has not been 'authenticated' yet.
void handle(javax.security.auth.callback.Callback callback, Authentication auth) throws java.io.IOException, javax.security.auth.callback.UnsupportedCallbackExceptionHandle the Callback. The handle method will be called for every callback instance sent from the LoginContext. Meaning that The handle method may be called multiple times for a given JaasAuthenticationCallbackHandler.
auth- The Authentication object currently being authenticated.