private IQueryable BindGroupBy(IQueryable query)
{
LambdaExpression groupLambda = null;
if (_groupingProperties != null && _groupingProperties.Any())
{
// Generates expression
// .GroupBy($it => new DynamicType1()
// {
// Prop1 = $it.Prop1,
// Prop2 = $it.Prop2,
// Prop3 = $it.NavProp.Prop3
// ...
// })
List <MemberAssignment> wrapperTypeMemberAssignments = CreateGroupByMemberAssignments(_groupByClrType, _groupingProperties);
groupLambda = Expression.Lambda(Expression.MemberInit(Expression.New(this._groupByClrType), wrapperTypeMemberAssignments), this._lambdaParameter);
}
else
{
// We do not have properties to aggregate
// .GroupBy($it => new GroupByWrapper())
groupLambda = Expression.Lambda(Expression.New(this._groupByClrType), this._lambdaParameter);
}
return(ExpressionHelpers.GroupBy(query, groupLambda, this._elementType, this._groupByClrType));
}
private IQueryable BindGroupBy(IQueryable query)
{
LambdaExpression groupLambda = null;
Type elementType = query.ElementType;
if (_groupingProperties != null && _groupingProperties.Any())
{
// Generates expression
// .GroupBy($it => new DynamicTypeWrapper()
// {
// GroupByContainer => new AggregationPropertyContainer() {
// Name = "Prop1",
// Value = $it.Prop1,
// Next = new AggregationPropertyContainer() {
// Name = "Prop2",
// Value = $it.Prop2, // int
// Next = new LastInChain() {
// Name = "Prop3",
// Value = $it.Prop3
// }
// }
// }
// })
List <NamedPropertyExpression> properties = CreateGroupByMemberAssignments(_groupingProperties);
var wrapperProperty = typeof(GroupByWrapper).GetProperty(GroupByContainerProperty);
List <MemberAssignment> wta = new List <MemberAssignment>();
wta.Add(Expression.Bind(wrapperProperty, AggregationPropertyContainer.CreateNextNamedPropertyContainer(properties)));
groupLambda = Expression.Lambda(Expression.MemberInit(Expression.New(typeof(GroupByWrapper)), wta), LambdaParameter);
}
else
{
// We do not have properties to aggregate
// .GroupBy($it => new NoGroupByWrapper())
groupLambda = Expression.Lambda(Expression.New(this._groupByClrType), this.LambdaParameter);
}
return(ExpressionHelpers.GroupBy(query, groupLambda, elementType, this._groupByClrType));
}
