internal static bool IsSupportedByBooleanOperator(this QueryElement element)
{
return(element.Type == QueryElementType.AnyQueryClause ||
element.Type == QueryElementType.BooleanQueryClause ||
element.Type == QueryElementType.ComparisonQueryClause ||
element.Type == QueryElementType.Group);
}
internal static QueryElement CleanGroups(this QueryElement element)
{
if (element is BooleanQueryClause clause)
{
clause.Item1 = clause.Item1.CleanGroups();
clause.Item2 = clause.Item2.CleanGroups();
}
else if (element is QueryElementGroup group)
{
if (group.Children.Count == 1)
{
element = group.Children.First().CleanGroups();
}
else
{
throw new InvalidOperationException();
}
}
return(element);
}
internal static QueryElement HandleBooleanElements(this QueryElement element, BooleanOperator booleanOperator)
{
return(new List <QueryElement> {
element
}.HandleBooleanElements(booleanOperator).First());
}