BookReviewManager

📚 Description

BookReviewManager is a Java console application built with Maven for managing a library of books and their reviews.
It leverages the Java Stream API to efficiently filter, sort, group, and compute statistics on book and review data.

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⚡ Main Features

1. Display Books Sorted by Average Rating

• Lists all books, ordered from highest to lowest average review score.
• Uses Java Streams for mapping and sorting.

2. Show Reviews for a Given Author

• Enter an author’s name:
  The program finds all books by that author and displays all their reviews, sorted by newest first.

3. Top Books by Genre

• For each genre, displays the top 3 books based on average rating.

4. Filter Books Published Before a Certain Year

• Enter a year:
  The program lists all books published before that year, along with their reviews.

5. Genre Statistics

• For each genre:
  Shows the number of books and the average rating (the mean of the averages).

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🛠️ Project Structure

• model/Book.java: Represents a book (title, author, publication year, genre, etc.)
• model/Review.java: Represents a review (rating, comment, date, etc.)
• model/Genre.java: Enumeration for book genres
• service/BookService.java: Business logic for filtering and retrieving books
• service/ReviewService.java: Business logic for retrieving and averaging reviews
• data/FakeDatabase.java: Simulates a simple in-memory database for books and reviews
• App.java: Application entry point with the console menu and main logic

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▶️ How to Run

1. Clone the repository:

   git clone https://github.com/Pololac/BookReviewManager.git
   

2. Build and launch the application:

   cd BookReviewManager
   mvn compile
   mvn exec:java -Dexec.mainClass="App"
   

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💡 Example Interaction

    List of books sorted by average rating:
    Book: The Hobbit - Average: 4.7
    Book: Dune - Average: 4.5
    ...
    
    Enter the author name:
    > Tolkien
    
    Reviews for books by Tolkien, sorted by date descending:
    Date: 2024-06-01 | Book ID: 1 | Comment: Amazing
    ...
    
    Top 3 books for genre: Fantasy
    - The Hobbit | Average: 4.7
    - Harry Potter | Average: 4.6
    ...

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🎯 Concepts Demonstrated

• Java Stream API for mapping, grouping, sorting, filtering collections
• Use of Map, List, and custom classes for data modeling
• Separation of concerns by using services for books and reviews

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Feel free to fork and adapt for your own library/book review needs!