Membership.java

package membership;

import video.Video;
import book.Book;
import book.LoanBook;
import book.Loanable;

public  abstract class Membership
{
   
    public boolean canBorrow(Loanable item,int nItems)
    {
        return false;
    }
   

}

package membership;

import book.Loanable;

public class StandardMembership extends Membership
{
    private final int nMaxBooks=6;
    private final int nMaxVideos = 1;
    public String toString()
    {
        return "Standard";
    }
    public boolean canBorrow(Loanable item,int nItems) {
        return  Membership.canBorrow(item,nItems,nMaxBooks,nMaxVideos);
    }
}

 package membership;

import java.util.Calendar;

import book.LoanBook;
import book.Loanable;

public class OapMembership extends Membership
{
    int nMaxVideos = 1;
    public boolean canBorrow(Loanable item, int nItems)
    {
        Calendar presentDay = Calendar.getInstance();
        int day = presentDay.get(Calendar.DAY_OF_WEEK);
//        if (day == Calendar.SATURDAY || day==Calendar.SUNDAY)
//            return false;
        if(item instanceof LoanBook)
            return true;
        if(item instanceof Loanable)
            return nItems<nMaxVideos;
        return false;
    }
    public String toString()
    {
        return "OAP";
    }

}

package membership;

import video.Video;
import book.LoanBook;
import book.Loanable;

public class JuniorMembership extends Membership {
    private final int nMaxBooks = 1;
    private final int nMaxVideos = 0;

    public String toString() {
        return "Junior";
    }

    public boolean canBorrow(Loanable item, int nItems) {
        return  Membership.canBorrow(item,nItems,nMaxBooks,nMaxVideos);
       
    }
}