| | | 1 | | namespace Pozitron.QuerySpecification; |
| | | 2 | | |
| | | 3 | | public class SpecificationInMemoryEvaluator |
| | | 4 | | { |
| | 1 | 5 | | public static SpecificationInMemoryEvaluator Default = new(); |
| | | 6 | | |
| | 14 | 7 | | protected List<IInMemoryEvaluator> Evaluators { get; } |
| | | 8 | | |
| | 2 | 9 | | public SpecificationInMemoryEvaluator() |
| | | 10 | | { |
| | 2 | 11 | | Evaluators = |
| | 2 | 12 | | [ |
| | 2 | 13 | | WhereEvaluator.Instance, |
| | 2 | 14 | | LikeMemoryEvaluator.Instance, |
| | 2 | 15 | | OrderEvaluator.Instance, |
| | 2 | 16 | | ]; |
| | 2 | 17 | | } |
| | 1 | 18 | | public SpecificationInMemoryEvaluator(IEnumerable<IInMemoryEvaluator> evaluators) |
| | | 19 | | { |
| | 1 | 20 | | Evaluators = evaluators.ToList(); |
| | 1 | 21 | | } |
| | | 22 | | |
| | | 23 | | public virtual IEnumerable<TResult> Evaluate<T, TResult>( |
| | | 24 | | IEnumerable<T> source, |
| | | 25 | | Specification<T, TResult> specification, |
| | | 26 | | bool ignorePaging = false) |
| | | 27 | | { |
| | 11 | 28 | | ArgumentNullException.ThrowIfNull(specification); |
| | 11 | 29 | | if (specification.Selector is null && specification.SelectorMany is null) throw new SelectorNotFoundException(); |
| | 10 | 30 | | if (specification.Selector is not null && specification.SelectorMany is not null) throw new ConcurrentSelectorsE |
| | | 31 | | |
| | 8 | 32 | | source = Evaluate(source, (Specification<T>)specification, true); |
| | | 33 | | |
| | 8 | 34 | | var result = specification.Selector is not null |
| | 8 | 35 | | ? source.Select(specification.Selector.Compile()) |
| | 8 | 36 | | : source.SelectMany(specification.SelectorMany!.Compile()); |
| | | 37 | | |
| | 8 | 38 | | return ignorePaging |
| | 8 | 39 | | ? result |
| | 8 | 40 | | : result.ApplyPaging(specification); |
| | | 41 | | } |
| | | 42 | | |
| | | 43 | | public virtual IEnumerable<T> Evaluate<T>( |
| | | 44 | | IEnumerable<T> source, |
| | | 45 | | Specification<T> specification, |
| | | 46 | | bool ignorePaging = false) |
| | | 47 | | { |
| | 13 | 48 | | ArgumentNullException.ThrowIfNull(specification); |
| | | 49 | | |
| | 96 | 50 | | foreach (var evaluator in Evaluators) |
| | | 51 | | { |
| | 36 | 52 | | source = evaluator.Evaluate(source, specification); |
| | | 53 | | } |
| | | 54 | | |
| | 12 | 55 | | return ignorePaging |
| | 12 | 56 | | ? source |
| | 12 | 57 | | : source.ApplyPaging(specification); |
| | | 58 | | } |
| | | 59 | | } |