/// <summary>
/// Applies a <see cref="ExpressionFilter"/> to filter the result.
/// </summary>
public FactQuery <T> Filter(ExpressionFilter condition)
{
if (_top != null || _skip != null)
{
// Programmer mistake
throw new InvalidOperationException($"Cannot filter the query again after either {nameof(Skip)} or {nameof(Top)} have been invoked.");
}
var clone = Clone();
if (condition != null)
{
if (clone._filter == null)
{
clone._filter = condition;
}
else
{
clone._filter = ExpressionFilter.Conjunction(clone._filter, condition);
}
}
return(clone);
}
/// <summary>
/// Applies a <see cref="ExpressionFilter"/> to filter the output.
/// </summary>
public AggregateQuery <T> Filter(ExpressionFilter condition)
{
if (_top != null)
{
// Programmer mistake
throw new InvalidOperationException($"Cannot filter the query after {nameof(Top)} has been invoked");
}
var clone = Clone();
if (condition != null)
{
if (clone._filter == null)
{
clone._filter = condition;
}
else
{
clone._filter = ExpressionFilter.Conjunction(clone._filter, condition);
}
}
return(clone);
}