veterinary-billing

A demonstration of Fluent interfaces / TDD / Functional idioms applied with OOPS

This application handle modes of billing in a veterinary hospital that can be done in three ways:

Single Owner

• One person pays all the bill

Multiple Owners

• Bill distibuted evenly
• One Pays it all
• Each Owner is responsible for some services and pays for the same

Billing Mappings (Cost of services for various animals) are declared in class com.veterinary.Animal

USAGE

Meta Data

private static final Owner BOB = new Owner("BOB");
private static final Owner JOHN = new Owner("JOHN");

Single Owner

Patient patient = new Patient(Animal.CAT, "Kessels");

patient.perform(Procedure.REGULAR_CHECKUP);

SingleOwnerBill decoratedBill = new SingleOwnerBill(patient.bill(), BOB);

System.out.println(decoratedBill);

Multiple Owner - Bill Distributed Evenly

Patient patient = new Patient(Animal.HORSE, "Blacky");

patient.perform(Procedure.REGULAR_CHECKUP);
patient.perform(Procedure.SURGERY);

MultipleOwnerBill decoratedBill = new DistributeEvenlyBill(patient.bill(), BOB, JOHN);

System.out.println(decoratedBill.costOccurredFor(BOB));
System.out.println(decoratedBill.costOccurredFor(JOHN));
System.out.println(decoratedBill);

Multiple Owner - One owner pays it all

Patient patient = new Patient(Animal.HORSE, "Blacky");

patient.perform(Procedure.REGULAR_CHECKUP);
patient.perform(Procedure.SURGERY);

MultipleOwnerBill decoratedBill = new OneOwnerPaysItAll(patient.bill(), BOB, BOB, JOHN);

System.out.println(decoratedBill.costOccurredFor(BOB));
System.out.println(decoratedBill.costOccurredFor(JOHN));
System.out.println(decoratedBill);

Multiple Owner - Every owner is responsible for some line items (Procedures/Medicines)

Patient patient = new Patient(Animal.HORSE, "Whitey");

patient.perform(Procedure.REGULAR_CHECKUP);
patient.perform(Medicine.PARACETAMOL);
patient.perform(Procedure.SURGERY);

MultipleOwnerBill decoratedBill = new LineItemsBill(patient.bill(),
                newLineItem(BOB, Procedure.SURGERY, Medicine.PARACETAMOL),
                newLineItem(JOHN, Procedure.REGULAR_CHECKUP));

System.out.println(decoratedBill.costOccurredFor(BOB));
System.out.println(decoratedBill.costOccurredFor(JOHN));
System.out.println(decoratedBill);