| | | 1 | | using Fluorite.Strainer.Models.Sorting; |
| | | 2 | | |
| | | 3 | | namespace Fluorite.Extensions; |
| | | 4 | | |
| | | 5 | | public static class SortExpressionQuerableExtensions |
| | | 6 | | { |
| | | 7 | | /// <summary> |
| | | 8 | | /// Sorts the elements of a sequence in an order according to |
| | | 9 | | /// <see cref="ISortExpression{TEntity}"/>. |
| | | 10 | | /// </summary> |
| | | 11 | | /// <typeparam name="TEntity"> |
| | | 12 | | /// The type of entity stored in a sequence. |
| | | 13 | | /// </typeparam> |
| | | 14 | | /// <param name="source"> |
| | | 15 | | /// The source sequence of elements. |
| | | 16 | | /// </param> |
| | | 17 | | /// <param name="sortExpression"> |
| | | 18 | | /// The sort expression providing information about sorting order and key. |
| | | 19 | | /// </param> |
| | | 20 | | /// <returns> |
| | | 21 | | /// An instance of ordered queryable sequence. |
| | | 22 | | /// </returns> |
| | | 23 | | /// <exception cref="ArgumentNullException"> |
| | | 24 | | /// <paramref name="sortExpression"/> is <see langword="null"/>. |
| | | 25 | | /// </exception> |
| | | 26 | | /// <exception cref="ArgumentNullException"> |
| | | 27 | | /// <paramref name="source"/> is <see langword="null"/>. |
| | | 28 | | /// </exception> |
| | | 29 | | public static IOrderedQueryable<TEntity> OrderWithSortExpression<TEntity>( |
| | | 30 | | this IQueryable<TEntity> source, |
| | | 31 | | ISortExpression<TEntity> sortExpression) |
| | | 32 | | { |
| | 9 | 33 | | Guard.Against.Null(source); |
| | 8 | 34 | | Guard.Against.Null(sortExpression); |
| | | 35 | | |
| | 7 | 36 | | if (sortExpression.IsSubsequent) |
| | | 37 | | { |
| | 2 | 38 | | var orderedSource = source as IOrderedQueryable<TEntity>; |
| | 2 | 39 | | if (sortExpression.IsDescending) |
| | | 40 | | { |
| | 1 | 41 | | return orderedSource.ThenByDescending(sortExpression.Expression); |
| | | 42 | | } |
| | | 43 | | else |
| | | 44 | | { |
| | 1 | 45 | | return orderedSource.ThenBy(sortExpression.Expression); |
| | | 46 | | } |
| | | 47 | | } |
| | | 48 | | else |
| | | 49 | | { |
| | 5 | 50 | | if (sortExpression.IsDescending) |
| | | 51 | | { |
| | 4 | 52 | | return source.OrderByDescending(sortExpression.Expression); |
| | | 53 | | } |
| | | 54 | | else |
| | | 55 | | { |
| | 1 | 56 | | return source.OrderBy(sortExpression.Expression); |
| | | 57 | | } |
| | | 58 | | } |
| | | 59 | | } |
| | | 60 | | } |