LibraryCatalogue.java

package librarycatalogue;

import java.util.HashMap;
import java.util.Map;


public class LibraryCatalogue {
    
    Map<String,Book> bookCollection = new HashMap<String,Book>();
    int currentDay = 0;
    int lengthOfCheckoutPeriod = 7;
    double initialLateFee = 0.50;
    double feePerLateDay = 1.00;
    
    // Constructors
    public LibraryCatalogue(Map<String,Book> collection) {
        this.bookCollection = collection;
    }
    
    public LibraryCatalogue(Map<String,Book> collection, int lengthOfCheckoutPeriod,
            double initialLateFee, double feePerLateDay) {
        this.bookCollection = collection;
        this.lengthOfCheckoutPeriod = lengthOfCheckoutPeriod;
        this.initialLateFee = initialLateFee;
        this.feePerLateDay = feePerLateDay;
}
    
    // Getters
     public int getCurrentDay() {
         return this.currentDay;
     }
     
     public Map<String,Book> getBookCollection() {
         return this.bookCollection;
     }
     
     public Book getBook(String bookTitle) {
         return getBookCollection().get(bookTitle);
     }
     
     public int getLengthOfCheckoutPeriod() {
         return this.lengthOfCheckoutPeriod;
     }
     
     public double getInitialLateFee() {
         return this.initialLateFee;
     }
     
     public double getFeePerLateDay() {
         return this.feePerLateDay;
     }
     
     // Setters
      public void nextDay() {
          currentDay++;
      }
      
      public void setDay(int day) {
          currentDay = day;
      }
      
      // Instance methods
      
      public void checkOutBook(String title) {
          Book book = getBook(title);
          if (book.getIsCheckedOut()) {
              sorryBookAlreadyCheckedOut(book);
          } else {
              book.setIsCheckedOut(true, currentDay);
              System.out.println("You just checked out " + title + ". It is due on day "+
                     (getCurrentDay() + getLengthOfCheckoutPeriod())+ "." );
          }
      }
      
      public void returnBook(String title) {
          Book book = getBook(title);
          int daysLate = currentDay - (book.getDayCheckedOut() + getLengthOfCheckoutPeriod());
          if (daysLate > 0) {
              System.out.println("You owe the library £" + (getInitialLateFee() + daysLate * getFeePerLateDay()) +
                      " because your book is " + daysLate + " days overdue.");
          } else {
              System.out.println("Book Returned. Thank you.");
          }
          book.setIsCheckedOut((false), -1);
      }
      
      public void sorryBookAlreadyCheckedOut(Book book) {
          System.out.println("Sorry, " + book.getTitle() + " is already checked out. "
                  + "It should be back on day " + (book.getDayCheckedOut() + 
                          getLengthOfCheckoutPeriod())+ ".");
      }
    public static void main(String[] args) {
        // TODO code application logic here
        Map<String,Book> bookCollection = new HashMap<String,Book>();
        Book harry = new Book("Harry Potter", 827132, 9999999);
        bookCollection.put("Harry Potter", harry);
        LibraryCatalogue lib = new LibraryCatalogue(bookCollection);
        lib.checkOutBook("Harry Potter");
        lib.nextDay();
        lib.nextDay();
        lib.checkOutBook("Harry Potter");
        lib.setDay(17);
        lib.returnBook("Harry Potter");
        lib.checkOutBook("Harry Potter"); 
    }
    
}