2 — Warmup: Defining and Working With Data

Due Thursday, 18 January 2024, 11:59:59pm

Background Northeastern has received funding to create an animal shelter and supporting veterinary clinic, to be known as the Husky Animal Lovers Park (HALP). The university would like to understand the administrative and personnel demands of running such a center, and have asked us to build a system that simulates how it may operate.

Our goal is to build a software system that can explore the potential behaviors and interactions at the center, as animal lovers visit and (hopefully) adopt pets, and manage the staff and appointments at the vet clinic.

Programming Task

The purpose of this milestone is to familiarize yourself with your tools and import configuration information for the center. The configuration will describe the animals currently at the shelter as well as the schedule of vets at the clinic. To ensure that the configuration is imported succesfully, we will compute some basic analytics.

The configuration will take the form of a JSON object of the following format:

    A Configuration is an object with two fields:


        "animals" : [Animal ...],

        "clinicians"  : [VetSpec ...]



    An Animal is an object with the following fields:


        "name" : String,

        "age"  : NaturalNumber,

        "type" : PetType,

        "beenVaccinated" : Bool,

        "picture" : UrlString



    INTERPRETATION: The "age" is the number of months since the animal's



    A UrlString is a String holding a valid URL.


    A PetType is either "Dog" or "Cat".


    A VetSpec is an object with the following fields:


        "name" : String,

        "specialties" : [String ...],

        "schedule" : [Day ...]



    INTERPRETATION: Some of the vets may have specialty areas, such as "Internal

    Medicine" or "Toxicology". The "schedule" field contains each

    Day that the named vet works in the clinic.


    A Day is one of the following Strings:

    - "M"

    - "Tu"

    - "W"

    - "Th"

    - "F"

    - "Sa"

    - "Su"

Your first task is to design a data representation for this information. Next, implement a method that parses raw, textual JSON information into your data representation. You are encouraged to use an existing library, such as gson, for this purpose.

Next, implement a method, or methods, that determine the following properties of the configuration:
  • The name of the oldest dog. Ties should be broken using lexicographical order on names

  • The name of the oldest cat. Ties should be broken using lexicographical order on names

  • The day of the week with the most working vets. Ties should be decided in favor of earlier days of the week (starting with Monday).

Finally, create an executable that accepts one command-line argument: the name of a file containing the JSON Configuration. The executable should compute and output the properties above in the following format:


        "seniors" : [StringOrNull, StringOrNull],

        "availabilty" : Day



    INTERPRETATION: the first element of the "seniors" field is the name

    of the oldest dog and the second is the name of the oldest cat. In the event

    that no such animal exists, the value should be null.


Your project should generate an executable named ImportConfiguration.jar (see Java, Maven) with the behavior described above. Building the project (such as with mvn package) should put the executable in a folder named target at the top level of your repo.