Object Oriented Programming Course Homework - VideosDB

November 2020

Bianca Necula
Faculty of Automatic Control and Computer Science
325CA

Info

git clone https://github.com/BiancaNecula/VideosDB.git

https://ocw.cs.pub.ro/courses/poo-ca-cd/teme/tema
This project is the implementation of an IMDB-like application written in Java, that provides information about movies and series. Users can receive personalized recommendations based on their preferences.
The platform simulates actions that users can take on a movie viewing platform: ratings, movie viewing, searches, recommendations, etc.

About the code

• test_db - contains the tests in JSON format
• src
  • checker - the checker's sources including the checkstyle necessary files
  • fileio - classes for parsing the input files, not to be modified
  • common, utils
    • contain utility classes with constants and static methods
  • actor
    • contains an enum for the types of awards an actor can have
    • you can add here your actor related classes
  • entertainment
    • contains an enum for the supported video genres
    • class for representing a Season of a tv show
    • you can add here your entertainment related classes
  • entities
    • contains classes for homework solving
• ref - tests output for reference
• result - tests output for this implementation

Implementation

After parsing and storing input data, the Entities redistribute the input in the new created objects:

• User: new functionality like storing the given ratings
• Show: abstract class with new functionality to calculate the total duration of a show, total number of views and average rating.
  • Movie
  • Serial: using Season objects for duration, views and rating
• Actor
• Action: split in 3 actions
  • Commands: solving 3 types of commands (Favorite, View, Rating) which store the result of the action in the respective objects and gives output for success or failure
    • Favorite: adding video in favorite videos list
    • View: adding video in viewed list
    • Rating: give rating
  • Queries: solving 8 types of query with list output
  • Recommendations: solving 5 types of recommendations for users
• Util: utility class with methods for queries
  • Average: returns a list with name of actors sorted by the number of ratings received for their movies
  • Awards: returns a list with actors which have all the awards mentioned in the query
  • Filter Description: returns a list with actors which have all the words mentioned in query in their description
  • Rating: returns a list of videos (shows or movies) sorted by rating
  • Favorite: returns a list of the most favorite videos (shows or movies) for users
  • Longest: returns a list of videos (shows or movies) sorted by duration
  • Most Viewed: returns a list of videos (shows or movies) sorted by the number of views
  • Number of ratings: returns a list with name of users sorted by the number of ratings given
  • Methods for finding users, shows and actors by name in lists
• UtilRecommendation: utility class with methods for recommendation
  • Standard: returns the first unseen video by user
  • Best unseen: returns the best unseen video by user (by rating)
  • Popular: for premium users, returns the first unseen video by user from the most popular genre
  • Favorite: for premium users, returns the most favorite video unseen by the user
  • Search: for premium users, returns a list with all the videos unseen by the user from a genre

Testing

The Main class runs the checker. Comparing ref files with result files.