▪ ProcessorOperation interface to provide a front-end layer between the request from the client workstation and the processor responsible for controlling the navigation dialog. The following diagram shows the role of the ProcessorOperation implementation:

▪ Definitions for the operations required to perform the main business transactions. These include definitions for toolkit entities such as contexts and formats.

▪ Definitions for the actions for executing operations. These actions must be able to signal an error event when the result of executing a business operation halts further user interaction. The processor can use this event to display an information message to the user. For example, the processor should display a message when an action retrieves a list of accounts but the operation cannot use them due to constraining business rules. Note that the toolkit provides a default action with this functionality, ExecuteOperationAct, in the com.ibm.btt.automaton.ext package.

▪ Input validation of the PIN number using a subclass of DSEGuardCondition. The subclass validates the PIN and returns true or false. For an incorrect PIN, the subclass should leave data in the process context so that the confirmation page can display an informative warning message for the user.

▪ JSP pages for rendering the views in a Web browser.