public SortedAggregator(IAggregateExpression keySelector, SortDirection sortDirection)
{
_keySelector = keySelector;
var comparer = CreateComparer(sortDirection);
_sortedFactCollection = new SortedFactCollection <TSource, TKey>(comparer);
}
public ProjectionAggregator(IAggregateExpression selector)
{
_selector = selector;
}
public FlatteningAggregator(IAggregateExpression selector)
{
_selector = selector;
}
public GroupByAggregator(IAggregateExpression keySelector, IAggregateExpression elementSelector)
{
_keySelector = keySelector;
_elementSelector = elementSelector;
}
private static Func <IAggregator> CreateSingleKeySortedAggregatorFactory(Type sourceType, SortDirection sortDirection, NamedExpressionElement selector, IAggregateExpression compiledSelector)
{
var keyType = selector.Expression.ReturnType;
var aggregatorType = typeof(SortedAggregator <,>).MakeGenericType(sourceType, keyType);
var ctor = aggregatorType.GetTypeInfo().DeclaredConstructors.Single();
var factoryExpression = Expression.Lambda <Func <IAggregator> >(
Expression.New(ctor, Expression.Constant(compiledSelector), Expression.Constant(sortDirection)));
return(factoryExpression.Compile());
}
public CustomSelectAggregator(IAggregateExpression selector)
{
_selector = selector;
}
public SortCondition(string name, SortDirection direction, IAggregateExpression expression)
{
Name = name;
KeySelector = expression;
Direction = direction;
}
public MimicSelectAggregator(IAggregateExpression selector)
{
_selector = selector;
}
