88 lines
3.1 KiB
C#
88 lines
3.1 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Reflection;
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using System.Text;
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using PoweredSoft.DynamicLinq;
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using PoweredSoft.DynamicQuery.Core;
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namespace PoweredSoft.DynamicQuery
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{
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public class QueryHandler : QueryHandlerBase, IQueryHandler
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{
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internal MethodInfo ExecuteGeneric = typeof(QueryHandler).GetMethods(BindingFlags.Instance | BindingFlags.NonPublic).First(t => t.Name == "Execute" && t.IsGenericMethod);
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internal IQueryExecutionResult ExecuteReflected() => (IQueryExecutionResult)ExecuteGeneric.MakeGenericMethod(QueryableUnderlyingType).Invoke(this, new object[]{});
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protected virtual IQueryExecutionResult Execute<T>()
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{
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ApplyIncludeStrategyInterceptors<T>();
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ApplyBeforeFilterInterceptors<T>();
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ApplyFilters<T>();
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return HasGrouping ? ExecuteGrouping<T>() : ExecuteNoGrouping<T>();
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}
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protected virtual IQueryExecutionResult ExecuteGrouping<T>()
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{
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var result = new GroupedQueryExecutionResult();
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result.TotalRecords = CurrentQueryable.LongCount();
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Criteria.Groups.ForEach(group =>
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{
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var finalGroup = InterceptGroup<T>(group);
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var groupCleanedPath = group.Path.Replace(".", "");
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CurrentQueryable = CurrentQueryable.GroupBy(QueryableUnderlyingType, gb =>
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{
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gb.Path(finalGroup.Path);
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});
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CurrentQueryable = CurrentQueryable.Select(sb =>
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{
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sb.ToList("Data");
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sb.Key($"Group_{groupCleanedPath}", group.Path);
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Criteria.Aggregates.ForEach(a =>
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{
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var selectType = ResolveSelectFrom(a.Type);
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var pathCleaned = a.Path.Replace(".", "");
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sb.Aggregate(a.Path, selectType, $"Agg_{a.Type}_{pathCleaned}");
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});
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});
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});
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return result;
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}
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protected virtual IQueryExecutionResult ExecuteNoGrouping<T>()
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{
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var result = new QueryExecutionResult();
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// total records.
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result.TotalRecords = CurrentQueryable.LongCount();
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// sorts and paging.
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ApplyNoGroupingSorts<T>();
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ApplyNoGroupingPaging<T>();
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// the data.
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result.Data = CurrentQueryable.ToObjectList();
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// if there is paging.
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if (HasPaging)
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{
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if (result.TotalRecords < Criteria.PageSize)
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result.NumberOfPages = 1;
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else
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result.NumberOfPages = result.TotalRecords / Criteria.PageSize + (result.TotalRecords % Criteria.PageSize != 0 ? 1 : 0);
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}
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return result;
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}
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public virtual IQueryExecutionResult Execute(IQueryable queryable, IQueryCriteria criteria)
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{
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Reset(queryable, criteria);
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return ExecuteReflected();
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}
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}
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}
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