| | | 1 | | namespace Pozitron.QuerySpecification; |
| | | 2 | | |
| | | 3 | | public class SpecificationEvaluator |
| | | 4 | | { |
| | 1 | 5 | | public static SpecificationEvaluator Default = new(); |
| | | 6 | | |
| | 53 | 7 | | protected List<IEvaluator> Evaluators { get; } |
| | | 8 | | |
| | 6 | 9 | | public SpecificationEvaluator() |
| | | 10 | | { |
| | 6 | 11 | | Evaluators = |
| | 6 | 12 | | [ |
| | 6 | 13 | | WhereEvaluator.Instance, |
| | 6 | 14 | | LikeEvaluator.Instance, |
| | 6 | 15 | | IncludeEvaluator.Instance, |
| | 6 | 16 | | OrderEvaluator.Instance, |
| | 6 | 17 | | AsNoTrackingEvaluator.Instance, |
| | 6 | 18 | | AsNoTrackingWithIdentityResolutionEvaluator.Instance, |
| | 6 | 19 | | IgnoreQueryFiltersEvaluator.Instance, |
| | 6 | 20 | | AsSplitQueryEvaluator.Instance |
| | 6 | 21 | | ]; |
| | 6 | 22 | | } |
| | | 23 | | |
| | 1 | 24 | | public SpecificationEvaluator(IEnumerable<IEvaluator> evaluators) |
| | | 25 | | { |
| | 1 | 26 | | Evaluators = evaluators.ToList(); |
| | 1 | 27 | | } |
| | | 28 | | |
| | | 29 | | public virtual IQueryable<TResult> Evaluate<T, TResult>( |
| | | 30 | | IQueryable<T> source, |
| | | 31 | | Specification<T, TResult> specification, |
| | | 32 | | bool ignorePaging = false) where T : class |
| | | 33 | | { |
| | 24 | 34 | | ArgumentNullException.ThrowIfNull(specification); |
| | 24 | 35 | | if (specification.Selector is null && specification.SelectorMany is null) throw new SelectorNotFoundException(); |
| | 23 | 36 | | if (specification.Selector is not null && specification.SelectorMany is not null) throw new ConcurrentSelectorsE |
| | | 37 | | |
| | 21 | 38 | | source = Evaluate(source, (Specification<T>)specification, true); |
| | | 39 | | |
| | 21 | 40 | | var resultQuery = specification.Selector is not null |
| | 21 | 41 | | ? source.Select(specification.Selector) |
| | 21 | 42 | | : source.SelectMany(specification.SelectorMany!); |
| | | 43 | | |
| | 21 | 44 | | return ignorePaging |
| | 21 | 45 | | ? resultQuery |
| | 21 | 46 | | : resultQuery.ApplyPaging(specification); |
| | | 47 | | } |
| | | 48 | | |
| | | 49 | | public virtual IQueryable<T> Evaluate<T>( |
| | | 50 | | IQueryable<T> source, |
| | | 51 | | Specification<T> specification, |
| | | 52 | | bool ignorePaging = false) where T : class |
| | | 53 | | { |
| | 50 | 54 | | ArgumentNullException.ThrowIfNull(specification); |
| | | 55 | | |
| | 878 | 56 | | foreach (var evaluator in Evaluators) |
| | | 57 | | { |
| | 390 | 58 | | source = evaluator.Evaluate(source, specification); |
| | | 59 | | } |
| | | 60 | | |
| | 49 | 61 | | return ignorePaging |
| | 49 | 62 | | ? source |
| | 49 | 63 | | : source.ApplyPaging(specification); |
| | | 64 | | } |
| | | 65 | | } |