Connie's Convenience Store - About Peter Coad

More documents

Recommendations

Info

18 Connie’s Convenience Store Applying Patterns: Select and Organize Problem-Domain Objects ProblemDomain Cash CashDrawer Cashier Charge Check Item Payment Person Register Sale SaleLineItem Session Store TaxCategory Sale SaleLineItem Session Figure 1–8: Select transactions. Payment APPLYING PATTERNS: SELECT AND ORGANIZE PROBLEM-DOMAIN OBJECTS You’ve selected a number of objects (and formed classes of them). Now, take an initial look at some patterns. An object-model pattern is a template of objects with stereotypical responsibilities and interactions; the template may be applied again and again by analogy. Use some patterns, initially, at this point, just to connect some of the pieces together in a meaningful way. You might discover some additional objects along the way, too. Cash Check Charge
Applying Patterns: Select and Organize Problem-Domain Objects Connie’s Convenience Store 19 Participant-transaction #3. “Participant-Transaction” Pattern transaction patterns Participant number startDate endDate password authorizationLevel aboutMe howMany howMuch rankTransactions calcOverTransactions isAuthorized calcForMe n 1 Transaction number date time status aboutMe calcForMe rateMe • Typical object interactions howMany —> calcForMe calcOverTransactions —> calcForMe howMuch —> calcForMe rankTransactions —> rateMe • Examples Participant: agent, applicant, buyer, cashier, clerk, client, civilian, customer, dealer, delegate, distributor, donor, employee, investor, manufacturer, member, officer, official, order clerk, owner, participant, policy holder, professional, prospect, recipient, retailer, sales clerk, sales rep, shipper, student, subscriber, supervisor, supplier, suspect, teacher, wholesaler, worker. Transaction: agreement, assignment, authorization, contract, delivery, deposit, incident, inquiry, order, payment, problem, report, purchase, refund, registration, rental, reservation, sale, shift, shipment, subscription, time charge, title, withdrawal. • Combinations actor-participant; participant-transaction; place-transaction; specific item– transaction; transaction–transaction line item; transaction–subsequent transaction. That large, numbered box with a double border is a pattern box. You’ll see these boxes from time-to-time, right when you need them, within the application chapters. The number in the upper left corner is a pattern number; it’s there for easy reference. See Chapter 7, “Strategies and Patterns Handbook,” for more. Session and its participants A session is a transaction object. What are its participants? The participants are a cashier and a register. A cashier starts a session on a specific register at a specific date and time.
Page 1 and 2: GETTING STARTED 1 Connie’s Conven
Page 3 and 4: Identifying System Purpose and Feat
Page 5 and 6: Selecting Objects Connie’s Conven
Page 7 and 8: Selecting Problem-Domain Objects Co
Page 17: Selecting Problem-Domain Objects Co
Page 21 and 22: Applying Patterns: Select and Organ
Page 29 and 30: Establishing Responsibilities for P
Page 55 and 56: Applying Patterns: Establish Proble
Page 61 and 62: Working Out Problem-Domain Dynamics
Page 63 and 64: Working Out Problem-Domain Dynamics
Page 65 and 66: Scenario: sale calculates its total
Page 67 and 68: Selecting Human-Interaction objects
Page 69 and 70:
Establishing Human Interaction Resp
Page 71 and 72:
Establishing Human Interaction Resp
Page 73 and 74:
Working Out Human-Interaction Dynam
Page 75 and 76:
Scenario: actual cashier logs on. S
Page 77 and 78:
Scenario: sell item. Receipt SaleLi
Page 79 and 80:
Scenario: get payment by check Rece
Page 81 and 82:
Selecting System-Interaction Object
Page 83 and 84:
Establishing System-Interaction Res
Page 85 and 86:
Working Out System-Interaction Dyna
Page 87 and 88:
Selecting Data-Management Objects a
Page 89 and 90:
Working Out Data-Management Dynamic
Page 91 and 92:
Progress at This Point Connie’s C
Page 93 and 94:
Progress at This Point Connie’s C
Page 95:
Wrap Up Connie’s Convenience Stor
show all

Connie's Convenience Store - About Peter Coad

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?