| | | 1 | | namespace Pozitron.QuerySpecification; |
| | | 2 | | |
| | | 3 | | public class OrderEvaluator : IEvaluator, IInMemoryEvaluator |
| | | 4 | | { |
| | 4 | 5 | | private OrderEvaluator() { } |
| | 2 | 6 | | public static OrderEvaluator Instance = new(); |
| | | 7 | | |
| | | 8 | | public IQueryable<T> Evaluate<T>(IQueryable<T> source, Specification<T> specification) where T : class |
| | | 9 | | { |
| | 56 | 10 | | IOrderedQueryable<T>? orderedQuery = null; |
| | | 11 | | |
| | 180 | 12 | | foreach (var orderExpression in specification.OrderExpressions) |
| | | 13 | | { |
| | 34 | 14 | | if (orderExpression.OrderType == OrderTypeEnum.OrderBy) |
| | | 15 | | { |
| | 19 | 16 | | orderedQuery = source.OrderBy(orderExpression.KeySelector); |
| | | 17 | | } |
| | 15 | 18 | | else if (orderExpression.OrderType == OrderTypeEnum.OrderByDescending) |
| | | 19 | | { |
| | 3 | 20 | | orderedQuery = source.OrderByDescending(orderExpression.KeySelector); |
| | | 21 | | } |
| | 12 | 22 | | else if (orderExpression.OrderType == OrderTypeEnum.ThenBy) |
| | | 23 | | { |
| | 2 | 24 | | orderedQuery = orderedQuery!.ThenBy(orderExpression.KeySelector); |
| | | 25 | | } |
| | 10 | 26 | | else if (orderExpression.OrderType == OrderTypeEnum.ThenByDescending) |
| | | 27 | | { |
| | 10 | 28 | | orderedQuery = orderedQuery!.ThenByDescending(orderExpression.KeySelector); |
| | | 29 | | } |
| | | 30 | | } |
| | | 31 | | |
| | 56 | 32 | | if (orderedQuery is not null) |
| | | 33 | | { |
| | 22 | 34 | | source = orderedQuery; |
| | | 35 | | } |
| | | 36 | | |
| | 56 | 37 | | return source; |
| | | 38 | | } |
| | | 39 | | |
| | | 40 | | public IEnumerable<T> Evaluate<T>(IEnumerable<T> source, Specification<T> specification) |
| | | 41 | | { |
| | 19 | 42 | | IOrderedEnumerable<T>? orderedQuery = null; |
| | | 43 | | |
| | 82 | 44 | | foreach (var orderExpression in specification.OrderExpressions) |
| | | 45 | | { |
| | 22 | 46 | | if (orderExpression.OrderType == OrderTypeEnum.OrderBy) |
| | | 47 | | { |
| | 15 | 48 | | orderedQuery = source.OrderBy(orderExpression.KeySelectorFunc); |
| | | 49 | | } |
| | 7 | 50 | | else if (orderExpression.OrderType == OrderTypeEnum.OrderByDescending) |
| | | 51 | | { |
| | 3 | 52 | | orderedQuery = source.OrderByDescending(orderExpression.KeySelectorFunc); |
| | | 53 | | } |
| | 4 | 54 | | else if (orderExpression.OrderType == OrderTypeEnum.ThenBy) |
| | | 55 | | { |
| | 2 | 56 | | orderedQuery = orderedQuery!.ThenBy(orderExpression.KeySelectorFunc); |
| | | 57 | | } |
| | 2 | 58 | | else if (orderExpression.OrderType == OrderTypeEnum.ThenByDescending) |
| | | 59 | | { |
| | 2 | 60 | | orderedQuery = orderedQuery!.ThenByDescending(orderExpression.KeySelectorFunc); |
| | | 61 | | } |
| | | 62 | | } |
| | | 63 | | |
| | 19 | 64 | | if (orderedQuery is not null) |
| | | 65 | | { |
| | 18 | 66 | | source = orderedQuery; |
| | | 67 | | } |
| | | 68 | | |
| | 19 | 69 | | return source; |
| | | 70 | | } |
| | | 71 | | } |