cmpt213-a2/src/PackageFactory.java

import java.time.LocalDateTime;

public enum PackageFactory {
    Book {
        public PackageInfo getInstance(String name, String notes, double price, double weight, boolean delivered, LocalDateTime expectedDate, String author) {
            return new BookPackage(name, notes, price, weight, delivered, expectedDate, author);
        }
    }

    Perishable {
        public PackageInfo getInstance (String name, String notes,double price, double weight,
        boolean delivered, LocalDateTime expectedDate, LocalDateTime expiryDate){
            return new PerishablePackage(name, notes, price, weight, delivered, expectedDate, expiryDate);
        }
    }

    Electronic{
        public PackageInfo getInstance(String name, String notes, double price, double weight, boolean delivered, LocalDateTime expectedDate, double handlingFee){
            return new ElectronicPackage(name, notes, price, weight, delivered, expectedDate, handlingFee);
        }
    }
}
    //public static PackageInfo getInstance(PackageType type, String name, String notes, double price, double weight, boolean delivered, LocalDateTime expectedDate, @Nullable String author, @Nullable LocalDateTime expiryDate, @Nullable double handlingFee){
    //}