public ILoan GetLoanByBook(IBook book)
{
if (book == null)
{
throw new ArgumentException(
String.Format("LoanMapDAO : getLoanByBook : book cannot be null."));
}
foreach (ILoan loan in loanDict.Values)
{
IBook tempBook = loan.Book;
if (book.Equals(tempBook))
{
return loan;
}
}
return null;
}
