eTicketing Platform

​ This is a project for Advanced Object-Oriented Programming course using Java. It simulates an e-Ticketing Platform containing information about tickets, events, locations and clients.

​ I implemented the following classes:

• Event - abstract class

  Abstract Method	Description
  calcMaxProfit()	returns a float representing the maximum profit of the event
  calcEventDuration()	returns a float representing the number of hours of the event
  calcEventProfit()	returns a float representing the real profit of the event (subtracting the maximum profit and the costs of the event such as location fees, singers price, etc)

  Subclasses:

  • Concert
    • Singer : aggregation
  • Play
    • Actor : aggregation
  • Conference

• Location - abstract class

  • Arena
  • Outdoor
  • Theatre

• Client - abstract class

  • Adult
  • Child

• Organizer

• Ticket -> includes method calcPrice() that applies 50% discount to children tickets (the method assures that the discount cannot be applied multiple times)

All the classes have constructors, setters, getters and equals, hashCode, toString methods overridden.

Auxiliary classes:

• Phone - phone number class designed using regex pattern validation

• Hour - class having Integers for hour and minutes

• TicketsBought - singleton class that stores a HashMap<Event, Integer> for keeping track of the number of tickets bought for every event

• Service - singleton class containing different methods called in the menu to demonstrate the use of classes and the project features.

• Main - class that simulates the user menu

​ In the Main class, there are several objects declared at the beginning so that I can display the project features in the menu (listing the existing locations for example).

​ As a client, you can:

1. buy a ticket for an event (the ticket class instance is done automatically based on the information provided by the user)
2. see available events (from a list that is updated in the classes constructors).

​ As an organizer, you can:

1. add a concert
2. add a play
3. add a conference
4. tickets bought until now*

Service methods:

Method	Description
stringToHour(String s)	returns an Hour class object given a string as a parameter; it is used for processing the user input
addPhone()	creates a Phone class object
addSinger()	creates a Singer class object; includes processing a string into Enum type
addActor()	creates an Actor class object
addLocation(String s)	creates and returns an/a Arena/Outdoor/Theatre class object casted to Event type
listAllSingers()	lists all singers from the Service list that is updated in the Singer class constructor
listAllActors()	lists all actors from the Service list that is updated in the Actor class constructor
sortSingersByName(List l)	returns an alphabetical ordered list of singers (sorted collection)
sortActorsByName(List l)	returns an alphabetical ordered list of actors (sorted collection)
listSortedLocations(List l)	returns a list of sorted locations in ascending order based on capacity; it uses compareTo overridden method from Comparable interface
addConcert(Organizer org)	returns a new instance of Concert class based on the input data; it also calls another methods such as addLocation if the user wants to add a new location for the event, or listLocations if the user wants to assign an existing location to the event
addPlay(Organizer org)	returns a new instance of Play class based on the input data; it also calls another methods such as addLocation if the user wants to add a new location for the event, or listLocations if the user wants to assign an existing location to the event
addConference(Organizer org)	returns a new instance of Conference class based on the input data; it also calls another methods such as addLocation if the user wants to add a new location for the event, or listLocations if the user wants to assign an existing location to the event
addClient(String s)	returns an/a Adult/Child class instance casted to Client class
addOrganizer()	return a new Organizer class instance based on the input data
listEvents()	lists all the existing events
readFromCSV(String option, String path)	generic method for reading objects information from CSV file; it returns an array of CSV corresponding class objects (singers / actors / arenas / outdoors / theatres); it is called by other methods such as addConcert, addPlay
writeToCSV(E object, String path)	generic method for writing objects information in CSV file; String 'path' argument is used to create the FileWriter object for the prerequisite class
auditWrite(String ts, String object, String action)	writes in audit.csv file the action name, the object class which readToCSV / writeToCSV method was called for and also the timestamp; it is called in the previous mentioned methods using suitable arguments

• For the first stage: All the addClass methods call the corresponding parameterized constructor so that the Service all_class lists are up to date.
• For the second stage: Some of the all_class lists are not used anymore due to the CSV reading method

Java collections used:

1. List (in Service class, used for storing objects on categories)
2. HashMap (in TicketsBought class, used for keeping track of the number of tickets bought for every event)