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added support for lots of new aggregate helpers.

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first breaking change but I think people will be okay with it :)
This commit is contained in:
David Lebee
2018-10-25 21:01:44 -05:00
parent dcaf114a09
commit 695d3085d1
5 changed files with 84 additions and 29 deletions
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PoweredSoft.DynamicLinq/Helpers/QueryableHelpers.cs
+26 -14
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@@ -246,25 +246,37 @@ namespace PoweredSoft.DynamicLinq.Helpers
resolver.Resolve();
return resolver.GetResultBodyExpression();
}
else if (selectType == SelectTypes.PathToList)
{
var parser = new ExpressionParser(parameter, path);
var resolver = new PathExpressionResolver(parser);
resolver.NullChecking = nullChecking;
resolver.CollectionHandling = selectCollectionHandling;
resolver.Resolve();
var expr = (resolver.Result as LambdaExpression).Body;
var notGroupedType = expr.Type.GenericTypeArguments.FirstOrDefault();
if (notGroupedType == null)
throw new Exception($"Path must be a Enumerable<T> but its a {expr.Type}");
else if (selectType == SelectTypes.ToList)
return CreateSelectExpressionPathWithMethodName(parameter, path, selectCollectionHandling, nullChecking, "ToList");
else if (selectType == SelectTypes.First)
return CreateSelectExpressionPathWithMethodName(parameter, path, selectCollectionHandling, nullChecking, "First");
else if (selectType == SelectTypes.FirstOrDefault)
return CreateSelectExpressionPathWithMethodName(parameter, path, selectCollectionHandling, nullChecking, "FirstOrDefault");
else if (selectType == SelectTypes.Last)
return CreateSelectExpressionPathWithMethodName(parameter, path, selectCollectionHandling, nullChecking, "Last");
else if (selectType == SelectTypes.LastOrDefault)
return CreateSelectExpressionPathWithMethodName(parameter, path, selectCollectionHandling, nullChecking, "LastOrDefault");
var body = Expression.Call(typeof(Enumerable), "ToList", new[] { notGroupedType }, expr) as Expression;
return body;
}
throw new NotSupportedException($"unkown select type {selectType}");
}
private static Expression CreateSelectExpressionPathWithMethodName(ParameterExpression parameter, string path, SelectCollectionHandling selectCollectionHandling, bool nullChecking, string methodName)
{
var parser = new ExpressionParser(parameter, path);
var resolver = new PathExpressionResolver(parser);
resolver.NullChecking = nullChecking;
resolver.CollectionHandling = selectCollectionHandling;
resolver.Resolve();
var expr = (resolver.Result as LambdaExpression).Body;
var notGroupedType = expr.Type.GenericTypeArguments.FirstOrDefault();
if (notGroupedType == null)
throw new Exception($"Path must be a Enumerable<T> but its a {expr.Type}");
var body = Expression.Call(typeof(Enumerable), methodName, new[] { notGroupedType }, expr) as Expression;
return body;
}
private static bool IsGrouping(IQueryable query)
{
// TODO needs to be alot better than this, but it will do for now.