Designing the Procedure Logic › Build Action Diagrams › Procedure Synthesis to Build an Action Diagram › Entity Maintenance

Entity Maintenance

This is used to synthesize a procedure that uses action diagrams for the entity actions read, update, delete and create. CA Gen can add extra logic to the action diagram if required, for instance:

• Two-stage commits for create, update and delete entity actions, that require the user to confirm a selected entity action for a selected entity. This reduces the risk of unintentional updates, at the cost of increased user interaction
• Associating commands on the associated layout to the synthesized actions for entity maintenance, clear screen, and refresh screen
• Clear screen logic
• Validation logic

The following sample code shows the type and sequence of logic that CA Gen will synthesize.

Synthesized Procedure Action Diagram

SYNTHESIZED PROCEDURE
     IMPORTS:  POPULATED
     EXPORTS:  POPULATED
SET INITIAL EXIT STATE
CLEAR SCREEN LOGIC
REFRESH SCREEN IF COMMAND IS EQUAL TO CLEAR
IS EQUAL TO CLEAR
MOVE IMPORTS TO EXPORTS
SECOND STAGE UPDATE/DELETE LOGIC
VALIDATION LOGIC
MAIN CASE OF COMMAND
USE ACTION BLOCKS

The synthesized groups of actions form the starting point for designing the detailed logic. For more information, see Refining Synthesized Procedure Action Diagrams.