.WHAT TO DO Below you will find starter information for this assignment. This in

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Jul 26, 2022


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Below you will find starter information for this assignment. This includes “data” and “behaviors” associated with that data, both of which are specific to a library. You will find two templates that show steps to perform certain processes. The first, Example 1, is a list of steps to order a meal from an online cafeteria. The second shows steps to generate a business’ quarterly tax payment. Both lists include “preconditions,” (what must be in place before the process can begin) and the “normal flow,” which is the best-case progression of steps for the process to run from beginning to end without interruptions. Missing, but something you should also consider are the “detours” in the flow of a process, for example when the process reaches a decision point (e.g., if something is in place, take path “A” otherwise, take path “B”). Using the two templates as examples of how to structure and submit your solution, please do the following:
PART 1: Imagine you plan to use resources in the NEIU library. Using Example 1 and Example 2 below as models, provide the step-by-step process you would follow to check out a book. This sequence of steps is to be a thorough listing of the normal flow (the best-case scenario, having no interruptions), alternate flow (e.g., the book you wish to check out is not available), preconditions and postconditions.
PART 2: Imagine you are the university librarian responsible for cataloguing materials stored in the library. You have been tasked with the responsibility of setting up a database that stores information about the library’s resources. Create a list of the information that a library would store for a book, for example title, author, category (fiction, non-fiction, technical, is it available or has it been checked out, and so on). Categorize this information in terms of a Java class: name, data, actions.
You may wish to begin with upon the information provided below and then add additional information of your choosing.
Problem 1a Initial Submission (12 points – due Monday, June 13, 11:59pm) Problem 1b Final Submission (13 points – due Friday, June 17, 11:59pm)
Object-Oriented Design CS 420-1, summer 2022/Sotak
• Use Case – What is the system supposed to do for the user?
• Each use case must include details about what has to be done to achieve its functionality.
• Guideline: Each step of the use case should be a simple declarative statement. Resist the temptation to
get too detailed.
• We need to consider the basic functionality, any alternatives, error conditions, anything that must be true before starting the use case, and anything that must be true on exiting the use case. The use case may include conditionals, branching, and loops.
CONSIDERATIONS – Pre- and Postconditions
• Pre- and postconditions indicate what comes before and after the use case.
• They tell what state the system must be in at the start of the use case (precondition) or what state the system
must be in at the end of the use case (postcondition).
• The postcondition must be true no matter which branch or alternative is followed for the use case.
• The flow of events is a series of declarative statements listing the steps of a use case from the actor’s point of view.
• Tell how it begins, using a statement such as “The use case begins when . . .” If the use case is for software, how does the software know when the use case begins?
• If the use case describes a business process, when does that process start?
• Similarly, how does the use case end? State this explicitly using a phrase such as “The use case ends.”
CONSIDERATIONS – Library Information
Materials (Data) Actions upon the Data (Behaviors)
magazine newspapers audio/visual (A/V)
check out books check in/return books
returnType (regular, shortTerm)
Object-Oriented Design CS 420-1, summer 2022/Sotak
CONSIDERATIONS – Presenting the Process EXAMPLE 1: Place an Order from the Cafeteria
A valid user has logged in to the system.
Basic Steps
1. The use case begins when the customer selects Place Order.
2. The customer enters his or her name and address.
3. If the customer enters only the zip code, the system supplies the city and state.
4. The customer enters product codes for the desired products.
5. The system supplies a product description and price for each item.
6. The system keeps a running total of items ordered as they are entered.
7. The customer enters credit card payment information.
8. The customer selects Submit.
9. The system verifies the information, saves the order as pending, and forwards
payment information to the accounting system. If any information is incorrect,
the system prompts the customer to correct it.
10. When payment is confirmed, the order is marked confirmed, an order ID is
returned to the customer, and the use case ends. If payment is not confirmed, the system will prompt the customer to correct payment information or cancel. If the customer chooses to correct the information, go back to step 7. If the customer chooses to cancel, the use case ends.
If the order was not canceled, it is saved in the system and marked confirmed.
EXAMPLE 2: Generate a Business’ Quarterly Tax Payment
It is the end of one of National Widgets’ business quarters.
Basic Steps
1. The use case begins when the system detects the end of a business quarter.
2. The system determines the amount of sales tax collected for the quarter.
3. The system sends an electronic payment of sales tax to the government.
4. The system verifies the taxes were received and the use case ends.
The government has deposited the taxes and updated National Widgets’ records.
Object-Oriented Design CS 420-1, summer 2022/Sotak


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