//PRIVATE METHODS
private void checkBookCopyIsbn(BookExample bookExample)
{
if (!dataContext.Books.ContainsKey(bookExample.Book.Isbn))
{
throw new Exception("Wrong book example Isbn reference");
}
}
public void AddBookExample(BookExample bookExample)
{
if (dataContext.BookExamples.Contains(bookExample))
{
throw new Exception("Data already exists");
}
checkBookCopyIsbn(bookExample);
dataContext.BookExamples.Add(bookExample);
}
public override bool Equals(object obj)
{
if ((obj == null) || !this.GetType().Equals(obj.GetType()))
{
return(false);
}
else
{
BookExample other = (BookExample)obj;
return((this.Book.Equals(other.Book)) && (this.Tax.Equals(other.Tax)) && (this.BasePrice.Equals(other.BasePrice)));
}
}
public void DeleteBookExample(BookExample bookExample)
{
foreach (Event evnt in dataContext.Events)
{
if (evnt.BookExample == bookExample)
{
throw new Exception("Book example is in use, can't be deleted");
}
}
Boolean result = dataContext.BookExamples.Remove(bookExample);
if (!result)
{
throw new Exception("No such book copy");
}
}
public void UpdateBookExample(int Id, BookExample bookExample)
{
if (!(Id < dataContext.BookExamples.Count))
{
throw new Exception("No such book copy index");
}
if (dataContext.BookExamples.Contains(bookExample))
{
throw new Exception("Data already exists");
}
checkBookCopyIsbn(bookExample);
BookExample currentBookExample = GetBookExample(Id);
foreach (Event evnt in dataContext.Events)
{
if (evnt.BookExample == currentBookExample)
{
evnt.BookExample = bookExample;
}
}
dataContext.BookExamples.Remove(currentBookExample);
dataContext.BookExamples.Insert(Id, bookExample);
}
public Return(DateTime returnDate, Client client, BookExample bookExample, DateTime eventTime) : base(eventTime, client, bookExample)
{
ReturnDate = returnDate;
}
public Purchase(Client client, BookExample bookExample, DateTime eventTime) : base(eventTime, client, bookExample)
{
}
protected Event(DateTime eventTime, Client client, BookExample bookExample)
{
EventTime = eventTime;
Client = client;
BookExample = bookExample;
}