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Merge pull request #96 from ardalis/v5
V5
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14 changes: 14 additions & 0 deletions
14
ArdalisSpecification/src/Ardalis.Specification/Evaluators/IEvaluator.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 1,14 @@ | ||
| using System; | ||
| using System.Collections.Generic; | ||
| using System.Linq; | ||
| using System.Text; | ||
|
|
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| namespace Ardalis.Specification | ||
| { | ||
| public interface IEvaluator | ||
| { | ||
| bool IsCriteriaEvaluator { get; } | ||
|
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| IQueryable<T> GetQuery<T>(IQueryable<T> query, ISpecification<T> specification) where T : class; | ||
| } | ||
| } |
12 changes: 12 additions & 0 deletions
12
ArdalisSpecification/src/Ardalis.Specification/Evaluators/IInMemoryEvaluator.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 1,12 @@ | ||
| using System; | ||
| using System.Collections.Generic; | ||
| using System.Linq; | ||
| using System.Text; | ||
|
|
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| namespace Ardalis.Specification | ||
| { | ||
| public interface IInMemoryEvaluator | ||
| { | ||
| IEnumerable<T> Evaluate<T>(IEnumerable<T> query, ISpecification<T> specification); | ||
| } | ||
| } |
13 changes: 13 additions & 0 deletions
13
ArdalisSpecification/src/Ardalis.Specification/Evaluators/IInMemorySpecificationEvaluator.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 1,13 @@ | ||
| using System; | ||
| using System.Collections.Generic; | ||
| using System.Linq; | ||
| using System.Text; | ||
|
|
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| namespace Ardalis.Specification | ||
| { | ||
| public interface IInMemorySpecificationEvaluator | ||
| { | ||
| IEnumerable<TResult> Evaluate<T, TResult>(IEnumerable<T> source, ISpecification<T, TResult> specification); | ||
| IEnumerable<T> Evaluate<T>(IEnumerable<T> source, ISpecification<T> specification); | ||
| } | ||
| } |
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60 changes: 60 additions & 0 deletions
60
ArdalisSpecification/src/Ardalis.Specification/Evaluators/InMemorySpecificationEvaluator.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 1,60 @@ | ||
| using System; | ||
| using System.Collections.Generic; | ||
| using System.Linq; | ||
| using System.Linq.Expressions; | ||
| using System.Text; | ||
|
|
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| namespace Ardalis.Specification | ||
| { | ||
| public class InMemorySpecificationEvaluator : IInMemorySpecificationEvaluator | ||
| { | ||
| // Will use singleton for default configuration. Yet, it can be instantiated if necessary, with default or provided evaluators. | ||
| public static InMemorySpecificationEvaluator Default { get; } = new InMemorySpecificationEvaluator(); | ||
|
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| private readonly List<IInMemoryEvaluator> evaluators = new List<IInMemoryEvaluator>(); | ||
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| public InMemorySpecificationEvaluator() | ||
| { | ||
| this.evaluators.AddRange(new IInMemoryEvaluator[] | ||
| { | ||
| WhereEvaluator.Instance, | ||
| OrderEvaluator.Instance, | ||
| PaginationEvaluator.Instance | ||
| }); | ||
| } | ||
| public InMemorySpecificationEvaluator(IEnumerable<IInMemoryEvaluator> evaluators) | ||
| { | ||
| this.evaluators.AddRange(evaluators); | ||
| } | ||
|
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| public virtual IEnumerable<TResult> Evaluate<T, TResult>(IEnumerable<T> source, ISpecification<T, TResult> specification) | ||
| { | ||
| _ = specification.Selector ?? throw new SelectorNotFoundException(); | ||
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| var baseQuery = Evaluate(source, (ISpecification<T>)specification); | ||
|
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| var resultQuery = baseQuery.Select(specification.Selector.Compile()); | ||
|
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| return specification.PostProcessingAction == null | ||
| ? resultQuery | ||
| : specification.PostProcessingAction(resultQuery); | ||
| } | ||
|
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| public virtual IEnumerable<T> Evaluate<T>(IEnumerable<T> source, ISpecification<T> specification) | ||
| { | ||
| if (specification.SearchCriterias.Count() > 0) | ||
| { | ||
| throw new NotSupportedException("The specification contains Search expressions and can't be evaluated with in-memory evaluator."); | ||
| } | ||
|
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| foreach (var evaluator in evaluators) | ||
| { | ||
| source = evaluator.Evaluate(source, specification); | ||
| } | ||
|
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| return specification.PostProcessingAction == null | ||
| ? source | ||
| : specification.PostProcessingAction(source); | ||
| } | ||
| } | ||
| } |
95 changes: 95 additions & 0 deletions
95
ArdalisSpecification/src/Ardalis.Specification/Evaluators/OrderEvaluator.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 1,95 @@ | ||
| using System; | ||
| using System.Collections.Generic; | ||
| using System.Linq; | ||
| using System.Text; | ||
|
|
||
| namespace Ardalis.Specification | ||
| { | ||
| public class OrderEvaluator : IEvaluator, IInMemoryEvaluator | ||
| { | ||
| private OrderEvaluator() { } | ||
| public static OrderEvaluator Instance { get; } = new OrderEvaluator(); | ||
|
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| public bool IsCriteriaEvaluator { get; } = false; | ||
|
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| public IQueryable<T> GetQuery<T>(IQueryable<T> query, ISpecification<T> specification) where T : class | ||
| { | ||
| if (specification.OrderExpressions != null) | ||
| { | ||
| if (specification.OrderExpressions.Where(x => x.OrderType == OrderTypeEnum.OrderBy || | ||
| x.OrderType == OrderTypeEnum.OrderByDescending).Count() > 1) | ||
| { | ||
| throw new DuplicateOrderChainException(); | ||
| } | ||
|
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| IOrderedQueryable<T>? orderedQuery = null; | ||
| foreach (var orderExpression in specification.OrderExpressions) | ||
| { | ||
| if (orderExpression.OrderType == OrderTypeEnum.OrderBy) | ||
| { | ||
| orderedQuery = query.OrderBy(orderExpression.KeySelector); | ||
| } | ||
| else if (orderExpression.OrderType == OrderTypeEnum.OrderByDescending) | ||
| { | ||
| orderedQuery = query.OrderByDescending(orderExpression.KeySelector); | ||
| } | ||
| else if (orderExpression.OrderType == OrderTypeEnum.ThenBy) | ||
| { | ||
| orderedQuery = orderedQuery.ThenBy(orderExpression.KeySelector); | ||
| } | ||
| else if (orderExpression.OrderType == OrderTypeEnum.ThenByDescending) | ||
| { | ||
| orderedQuery = orderedQuery.ThenByDescending(orderExpression.KeySelector); | ||
| } | ||
| } | ||
|
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| if (orderedQuery != null) | ||
| { | ||
| query = orderedQuery; | ||
| } | ||
| } | ||
|
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| return query; | ||
| } | ||
|
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| public IEnumerable<T> Evaluate<T>(IEnumerable<T> query, ISpecification<T> specification) | ||
| { | ||
| if (specification.OrderExpressions != null) | ||
| { | ||
| if (specification.OrderExpressions.Where(x => x.OrderType == OrderTypeEnum.OrderBy || | ||
| x.OrderType == OrderTypeEnum.OrderByDescending).Count() > 1) | ||
| { | ||
| throw new DuplicateOrderChainException(); | ||
| } | ||
|
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| IOrderedEnumerable<T>? orderedQuery = null; | ||
| foreach (var orderExpression in specification.OrderExpressions) | ||
| { | ||
| if (orderExpression.OrderType == OrderTypeEnum.OrderBy) | ||
| { | ||
| orderedQuery = query.OrderBy(orderExpression.KeySelector.Compile()); | ||
| } | ||
| else if (orderExpression.OrderType == OrderTypeEnum.OrderByDescending) | ||
| { | ||
| orderedQuery = query.OrderByDescending(orderExpression.KeySelector.Compile()); | ||
| } | ||
| else if (orderExpression.OrderType == OrderTypeEnum.ThenBy) | ||
| { | ||
| orderedQuery = orderedQuery.ThenBy(orderExpression.KeySelector.Compile()); | ||
| } | ||
| else if (orderExpression.OrderType == OrderTypeEnum.ThenByDescending) | ||
| { | ||
| orderedQuery = orderedQuery.ThenByDescending(orderExpression.KeySelector.Compile()); | ||
| } | ||
| } | ||
|
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| if (orderedQuery != null) | ||
| { | ||
| query = orderedQuery; | ||
| } | ||
| } | ||
|
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| return query; | ||
| } | ||
| } | ||
| } |
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