public Book(string author, string title, string callNumber, int bookID)
{
if (!sane(author, title, callNumber, bookID))
{
throw new ArgumentException("Member: constructor : bad parameters");
}
this.author = author;
this.title = title;
this.callNumber = callNumber;
this.id = bookID;
this.state = BookConstants.BookState.AVAILABLE;
this.loan = null;
}
public void Borrow(ILoan loan)
{
if (loan == null)
{
throw new ArgumentException("Book: borrow : Bad parameter: loan cannot be null");
}
if (!(state == BookConstants.BookState.AVAILABLE))
{
string mesg = String.Format("Illegal operation in state : {0}", state);
throw new ApplicationException(mesg);
}
this.loan = loan;
state = BookConstants.BookState.ON_LOAN;
}
public void Lose()
{
if (!(state == BookConstants.BookState.ON_LOAN))
{
throw new ApplicationException(String.Format("Illegal operation in state : {0}", state));
}
state = BookConstants.BookState.LOST;
}
public void Dispose()
{
if (!(state == BookConstants.BookState.AVAILABLE ||
state == BookConstants.BookState.DAMAGED ||
state == BookConstants.BookState.LOST))
{
throw new ApplicationException(String.Format("Illegal operation in state : {0}", state));
}
state = BookConstants.BookState.DISPOSED;
}
public void ReturnBook(bool damaged)
{
if (!(state == BookConstants.BookState.ON_LOAN || state == BookConstants.BookState.LOST))
{
throw new ApplicationException(String.Format("Illegal operation in state : {0}", state));
}
loan = null;
if (damaged)
{
state = BookConstants.BookState.DAMAGED;
}
else
{
state = BookConstants.BookState.AVAILABLE;
}
}
public void Repair()
{
if (!(state == BookConstants.BookState.DAMAGED))
{
throw new ApplicationException(String.Format("Illegal operation in state : {0}", state));
}
state = BookConstants.BookState.AVAILABLE;
}
