public IEnumerable <Movie> Filter(IsSatisfiedByDelegate isSatisfiedBy)
{
foreach (var item in _list)
{
var movie = (Movie)item;
if (isSatisfiedBy(movie))
{
yield return(movie);
}
}
}
static void Main(string[] args)
{
movies = new Movies();
movies.Add(new Movie(11, "Title -1", 1, new DateTime(2013, 05, 05)));
movies.Add(new Movie(13, "Title -2", 2, new DateTime(2013, 05, 02)));
movies.Add(new Movie(21, "Title -4", 1, new DateTime(2013, 05, 19)));
movies.Add(new Movie(19, "Title -3", 3, new DateTime(2013, 05, 20)));
movies.Add(new Movie(17, "Title -7", 2, new DateTime(2013, 05, 01)));
movies.Add(new Movie(16, "Title -9", 1, new DateTime(2013, 05, 15)));
PrintMovies("Initial List");
movies.Sort();
PrintMovies("After sorting");
movies.Sort(new MovieComparerByReleaseDate());
PrintMovies("After Sorting by ReleaseDate");
//movies.Sort(Program.CompareMovieByPriceCode);
/*movies.Sort(delegate (Movie left, Movie right)
* {
* if (left.PriceCode < right.PriceCode) return -1;
* if (left.PriceCode > right.PriceCode) return 1;
* return 0;
* });*/
movies.Sort(MovieComparer.ByPriceCode);
PrintMovies("After sorting by PriceCode");
var moviesWithPriceCode1 = movies.Filter(new MovieSpecificationByPriceCode(1));
PrintMovies(moviesWithPriceCode1, "Movies with price code = 1");
var moviesWithoutPriceCode1 = movies.Filter(new InverseSpecification(new MovieSpecificationByPriceCode(1)));
PrintMovies(moviesWithoutPriceCode1, "Movies except price code = 1");
IsSatisfiedByDelegate moviesWithIdGT15 = (m) => m.Id > 15;
PrintMovies(movies.Filter(moviesWithIdGT15), "Movies with ID > 15");
Console.ReadLine();
}