Restaurant Classes

This page lists the milestone requirements for Milestone 1 of the CC 410 Restaurant Project. Read the requirements carefully and discuss any questions with the instructors or TAs.

Purpose

The CC 410 Restaurant Project project for this semester is centered around building a point of sale (POS) system for a fictional restaurant named That’s a Wrap, offering wraps of all shapes and sizes to celebrate our favorite movies.

This first milestone involves building the classes that represent items on the restaurant’s menu. In a traditional Model-View-Controller software design pattern, these classes would make up the core of the model. This content should be mostly review of concepts learned in prior CC courses with the addition of enumerations (enums). It should not be particularly difficult, but it may be repetitive and time consuming.

Specifically, we’ll focus primarily on data encapsulation by storing attributes about each menu item in the class. We’ll also learn how to combine state and behavior by modifying the string representation of the object based on the current state, or the combined values stored in the attributes.

Note

In future milestones, we’ll focus on adding inheritance to simplify the code and structure in these classes. We’ll also add proper unit tests and documentation to these classes. For now, our only focus is on building the classes themselves.

General Requirements

Warning

The first couple of milestones only require a subset of the general requirements introduced in the “Hello Real World” project. Read this section carefully to see what is required for this particular milestone.

This milestone must follow these professional coding standards:

  • All code must be object-oriented.
    • All executable code must be within a class
      • Python package files such as __init__.py and __main__.py are exempt.
    • Classes must be organized into packages based on common usage.
  • This project must include automation for compilation and execution.
    • Java: Use Gradle with the application plugin. The project should compile without errors. You may include a main class in a separate package for testing purposes only.
    • Python: Use tox configured to use Python 3.9 and a requirements file to install libraries. You may include a main class in a separate package for testing purposes only.
  • All code must properly compile or be interpreted.
    • Java: It must compile using Gradle.
    • Python: It must be interpreted using Python 3.9. Where specified, type hints should be included in the code, and all code should pass a strict Mypy type check.
  • Submissions to Canvas should be tagged GitHub releases that are numbered according to Semantic Versioning.

The following requirements ARE NOT enforced for this milestone, but will be enforced in later milestones that use the same code. We will focus on learning to meet each of these requirements in future modules. However, you are welcome to “plan ahead” by minimizing the number of style errors in your code and adding some basic documentation where desired.

Naming Standards

You can make things easier on yourself by following proper naming standards for your language of choice, even though we aren’t enforcing a style guide for this milestone.

  • Java - All names are in CamelCase. Classes start with uppercase, like ClassName, methods and attributes start with lowercase like methodName. See the Google Style Guide.
  • Python - All names are lowercase with underscores like method_name, with the exception of classes, which are named in CamelCase starting with an uppercase letter like ClassName. See the Google Style Guide.

It is easier to get this correct from the start, then having to refactor your code later. Of course, major refactoring is also a good lesson that guarantees you’ll get it right in the future!

  • (Milestone 3) All code submitted must be free of style errors. We will be using the Google Style Guide for each language.
    • Java: Use Checkstyle 8.38+ and the Google Style Configuration.
      • You may modify the configuration to allow 4 space indentations instead of 2 space indentations.
    • Python: Use Flake8 with the flake8-docstrings and pep8-naming plugins. Code should conform to PEP 8 style with Google style docstrings.
  • (Milestone 2) Where specified, code should contain appropriate unit tests that achieve the specified level of code coverage.
    • Java: Use JUnit 5. You may choose to use Hamcrest for assertions.
    • Python: Use pytest. You may choose to use Hamcrest for assertions.
  • (Milestone 2) Where specified, code should contain appropriate documentation comments following the language’s style guide.
    • Java: Use javadoc to generate documentation.
    • Python: Use pdoc3 to generate documentation.

Assignment Requirements

This milestone should include the following features:

  • Wrap classes - 5
    • Declared in the thatsawrap.data.wraps package
  • Side classes - 3
    • Declared in the thatsawrap.data.sides package
  • Drink classes - 3
    • Declared in the thatsawrap.data.drinks package
  • Enumeration classes - 3
    • Declared in the thatsawrap.data.enums package

See the That’s a Wrap Menu section below for descriptions of what each class should contain.

Python - these files should include complete type annotations and achieve a low imprecision percentage in Mypy using strict type checking.

Python Type Checking

In my testing, the only imprecision in type checking should be the first line of the __eq__ method since it must accept an imprecise object type until the isinstance() method call. It will also mark the @property.setter annotations, but they don’t count toward the imprecision total and can be ignored. The total imprecision should be less than 5% overall, and will probably be less than 2% in most cases. -Russ

Time Requirements

Completing this project is estimated to require 3-8 hours.

Expected Scope

In my testing, this milestone requires around 1000-1500 lines of pure code without documentation, or around 2000-2500 lines including documentation comments that will be included as part of milestone 2. Much of the code can be carefully copy-pasted between files with similar attributes. My best suggestion is to do the enumerations first, then pick one of the complex wraps and start there. Once you have the wraps all working, the sides and drinks are pretty easy and use much of the same structure. -Russ

Grading Rubric

This assignment will be graded based on the rubric below:

  • Wrap classes - 40%
  • Side classes - 20%
  • Drink classes - 30%
  • Enumeration classes - 10%

The following deductions apply:

  • Any portion of the project which will not compile (Java), pass a strict type check (Python), or execute properly will be given a grade of 0.
  • Any portion of the project which does not meet the general requirements listed above will have a commensurate amount of points deducted.

This is not an exhaustive list of possible deductions. The instructors will strive to provide reasonable and fair grading, but we can’t predict all possible defects. It is up to the student to ensure that the project is complete and correct before submission.

Code Review

As part of the grading of all assignments in this course, I will be doing a deep dive into a few classes in your code. This will include leaving detailed comments on code style and format in GitHub. I will usually choose various classes to review at random, and any issues found in that class will be verified in other classes of the same type. - Russ

Submission

Submit this assignment by creating a release on GitHub and uploading the release URL to the assignment on Canvas. You should not submit this Codio project or mark it as complete in Codio, in case you need to come back to it and make changes later.

That’s a Wrap Menu

our motto: be a star - wrap things your way!

Each attribute described below should be implemented as a private variable within the class. Most attributes will also include a getter method, and sometimes a setter method, following this naming scheme (using Price as an example):

  • Java - The private price attribute would have a getPrice getter and setPrice setter method.
  • Python - The private __price attribute would have a getter and setter named price implemented as a Python Property.

Wraps

Each wrap should be stored in an appropriately named class in the thatsawrap.data.wraps package. Each wrap should include an attribute for the following data:

  • Shell - a Shell value (see below). It should have a getter and setter method.
  • Addins - a Java HashSet or a Python set of Addin values (see below).
    • This attribute should have a getter method that returns a shallow copy of the set to prevent external modification. See HashSet’s Copy Constructor (Java) or set.copy (Python).
    • This attribute should also have methods for Add Addin and Remove Addin to modify the list of condiments.

In addition, each wrap should have the ability to return the following data through an appropriate getter method. The data may be stored as attributes or hard coded directly into the method.

  • Price - a Java double or Python float value representing the base price of the item plus any upcharge associated with the chosen Shell value.
  • Calories - an int value representing the number of calories associated with the item.
  • Instructions - a Java LinkedList of String values or a Python list of str values.
Warning

Unfortunately, the Java clone() methods can cause an unchecked cast exception when used on Java Collections classes with generics. See this StackOverflow question for a discussion of how to get around that using a copy constructor.

Each wrap class should also override the default string representation method (toString() in Java or __str__() in Python) and return a string that properly describes the wrap. The string should be formatted as “{wrap name} in a {shell} Shell”, such as “The Godfather in a Stromboli Shell”.

It should also override the default equality method (equals() in Java or __eq__() in Python). Two items should be considered equal only if the values of all attributes are equal.

Each wrap description will include a list of ingredients included on the wrap. Those ingredients should be represented using Boolean attributes that are set to true by default, with appropriate getter and setter methods. Changing any of these to false will cause a “Hold {ingredient}” message, such as “Hold Pepperoni”, to be added to the Instructions list. Likewise, changing it back to true will remove the appropriate message. If all ingredients are at their default values, the Instructions list should be empty.

Each wrap will be served in a particular Default Shell, and will include a default set of Addins. Those attributes should be populated appropriately in the constructor for the wrap. Changes to the Shell and Addins attributes will not affect the Instructions attribute at this time (we’ll add that later).

The number of Calories for a wrap will remain constant, regardless of other attributes (we’ll just pretend that changing the wrap doesn’t change the number of calories).

The Price for a wrap will change based on the value selected for the Shell. Each wrap will have a base price listed for the Default Shell option. Other shells include an associated upcharge or discount, which must be adjusted.

Shell Prices

This means that the prices shown on the menu already include the upcharge for the given default shell. You may want to calculate and store a base price for the item by removing the upcharge from the menu price.

The Godfather (Italian Stromboli)

this wrap will make your taste buds an offer they can’t refuse

thatsawrap.data.wraps.Godfather - The price is $9.65 and it is 1268 calories. Served in a Stromboli Shell. Ingredients: Pepperoni, Sausage, Marinara and Cheese. Addins: Peppers and Onions.

The Wizard of Oz (Spinach Greens)

an emerald city of flavors - truly a wrap of a different color

thatsawrap.data.wraps.Wizard - The price is $10.35 and it is 1085 calories. Served in a Spinach Shell. Ingredients: Chicken, Spinach, Cheese. Addins: Tomatoes and Dressing.

Some Like It Hot (Buffalo Chicken)

a hot and spicy classic

thatsawrap.data.wraps.SomeLike - The price is $11.45 and it is 1370 calories. Served in a Whole Grain Shell. Ingredients: Chicken, Cheese. Addins: Onions, Peppers and Buffalo Sauce.

West Side Story (Corned Beef)

a specialty from the city so nice they named it twice

thatsawrap.data.wraps.WestSide - The price is $8.75 and it is 1240 calories. Served in a Whole Grain Shell. Ingredients: Corned Beef, Cabbage and Cheese. Addins: Onions, Pickles and Mustard.

Spartacus (Everything)

a massive wrap that can feed even the hungriest warrior

thatsawrap.data.wraps.Spartacus - The price is $16.55 and it is 1874 calories. Served in a Spinach Shell. Ingredients: Pepperoni, Sausage, Chicken, Corned Beef and Cheese. Addins: Peppers, Tomatoes, Onions, Pickles, Buffalo Sauce and Dressing.

Sides

Each side should be stored in an appropriately named class in the thatsawrap.data.sides package. Each side should include an attribute for the following data:

  • Size - a Size value (see below). It should have a getter and setter method.

In addition, each side should have the ability to return the following data through an appropriate getter method. The data may be stored as attributes or hard coded directly into the method.

  • Price - a Java double or Python float value.
  • Calories - an int value.

Each side class should also override the default string representation method (toString() in Java or __str__() in Python) and return a string that properly describes the side. The string should be formatted as “{size} {side name}”, such as “Indie Yankee Doodle Dandy”.

It should also override the default equality method (equals() in Java or __eq__() in Python). Two items should be considered equal only if the values of all attributes are equal.

Each side description will include a Price and number of Calories for each Size. The sides will have a default size of Indie.

Yankee Doodle Dandy (Mac & Cheese)

stuck a feather in his cap and called it macaroni

thatsawrap.data.sides.Yankee - Indie: $2.25 and 400 calories. Studio: $3.95 and 650 calories. Blockbuster: $6.25 and 875 calories.

The French Connection (Fries)

fried potatoes good enough to keep for yourself

thatsawrap.data.sides.French - Indie: $2.75 and 550 calories. Studio: $4.85 and 700 calories. Blockbuster: $5.25 and 950 calories.

Snow White (Apple Slices)

guaranteed not to be poisoned or your money back

thatsawrap.data.sides.SnowWhite - Indie: $1.50 and 225 calories. Studio: $2.25 and 350 calories. Blockbuster: $3.00 and 475 calories.

Drinks

Each drink should be stored in an appropriately named class in the thatsawrap.data.drinks package. Each drink should include an attribute for the following data:

  • Size - a Size value (see below). It should have a getter and setter method.

In addition, each drink should have the ability to return the following data through an appropriate getter method. The data may be stored as attributes or hard coded directly into the method.

  • Price - a Java double or Python float value.
  • Calories - an int value. It should have a getter method.
  • Instructions - a Java LinkedList of String values or a Python list of str values.

Each drink class should also override the default string representation method (toString() in Java or __str__() in Python) and return a string that properly describes the drink. The string should be formatted as “{size} {drink name}”, such as “Indie Forrest Gump”.

It should also override the default equality method (equals() in Java or __eq__() in Python). Two items should be considered equal only if the values of all attributes are equal.

Each drink description may include a list of flavors that may be added. Those flavors should be represented using Boolean attributes that are set to false by default, with appropriate getter and setter methods. Changing any of these to true will cause a “Add {flavor}” message, such as “Add Cherry”, to be added to the Instructions list. Likewise, changing it back to false will remove the appropriate message.

In addition, drinks may specify default flavors that should be represented using Boolean attributes that are set to true by default, with appropriate getter and setter methods. Changing any of these to false will cause a “Hold {flavor}” message, such as “Hold Coconut”, to be added to the Instructions list. Likewise, changing it back to true will remove the appropriate message.

If all flavors are at their default values, the Instructions list should be empty.

Each side description will include a Price and number of Calories for each Size. The sides will have a default size of Indie. Changes to the Size attribute will not affect the Instructions attribute.

Forrest Gump (Chocolate Shake)

you never know what you are going to get

thatsawrap.data.drinks.Forrest - Flavors: Chocolate (default), Vanilla, Caramel and Coffee. Indie: $5.25 and 980 calories. Studio: $7.50 and 1365 calories. Blockbuster: $9.00 and 1875 calories.

Singin’ in the Rain (Soda Fountain)

comes with a little umbrella, but you have to provide the song

thatsawrap.data.drinks.Singin - Flavors: Cherry (default), Strawberry, Cola and Grape. Indie: $2.75 and 360 calories. Studio: $3.25 and 400 calories. Blockbuster: $4.00 and 550 calories.

Rocky (Protein Smoothie)

eye of the tiger not included

thatsawrap.data.drinks.Rocky - Flavors: Strawberry (default), Banana, Peach and Mango. Indie: $5.85 and 665 calories. Studio: $7.95 and 825 calories. Blockbuster: $9.45 and 1060 calories.

Enumerations

Each enumeration should be stored in an appropriately named class in the thatsawrap.data.enums package. Each enumeration class should also override the default string representation method (toString() in Java or __str__() in Python) and return a string that properly describes the item. Python developers may also wish to override the __repr__() method to return this value as well.

Shell

an excellent setting for a delicious meal

thatsawrap.data.enums.Shell - Whole Grain (add $0.75), Spinach (add $1.00) or Stromboli (add $1.50)

Enums with Data

It is possible to create an enumeration that also stores additional data associated with each value, and then access that data through the enum value. You may be able to use this to simplify handling the upcharge for each shell. Below are links to some sample code from later in this course that shows how to create such an enum and use that data.

Java: Enum Usage
Python: Enum Usage

Size

options to fit any budget

thatsawrap.data.enums.Size - Indie (Small), Studio (Medium), Blockbuster (Large)

Addins

the extras aren’t just in the background

thatsawrap.data.enums.Addins - Peppers, Onions, Tomatoes, Pickles, Dressing, Buffalo Sauce, Mustard

Special thanks to friends and family for inspiration and menu suggestions!

6.0.0

Last modified by: Russell Feldhausen Jan 12, 2023