private IEnumerable <Book> GetMatchedBooks(ISearchCriteria <Book> searchCriteria)
{
foreach (var book in this.books)
{
if (searchCriteria.IsMatch(book))
{
yield return(book);
}
}
}
/// <summary>
/// Finds book by criteria.
/// </summary>
/// <param name="searchCriteria">Given criteria.</param>
/// <returns>Found book.</returns>
public Book FindBookByTag(ISearchCriteria <Book> searchCriteria)
{
foreach (var book in this.books)
{
if (searchCriteria.IsMatch(book))
{
return(book);
}
}
return(null);
}
