private CriteriaOperator Extract(CriteriaOperator criteriaOperator, string matchString,
CriteriaOperator replaceOperator)
{
if (criteriaOperator is BinaryOperator)
{
var binaryOperator = (BinaryOperator)criteriaOperator;
binaryOperators.Add(binaryOperator);
return(binaryOperator);
}
if (criteriaOperator is NullOperator)
{
nullOperators.Add((NullOperator)criteriaOperator);
return(criteriaOperator);
}
if (criteriaOperator is NotOperator)
{
var notOperator = (NotOperator)criteriaOperator;
notOperators.Add(notOperator);
Extract(notOperator.Operand);
}
else if (criteriaOperator is UnaryOperator)
{
unaryOperators.Add((UnaryOperator)criteriaOperator);
return(criteriaOperator);
}
else if (criteriaOperator is GroupOperator)
{
var groupOperator = (GroupOperator)criteriaOperator;
CriteriaOperatorCollection operands = groupOperator.Operands;
var indexesToremove = new List <int>();
for (int i = 0; i < operands.Count; i++)
{
CriteriaOperator operand = operands[i];
if (operand.ToString() == matchString)
{
if (ReferenceEquals(replaceOperator, null))
{
indexesToremove.Add(i);
}
else
{
operands[i] = replaceOperator;
}
}
else
{
CriteriaOperator extract = Extract(operand);
operands.RemoveAt(i);
operands.Insert(i, extract);
}
}
foreach (int i in indexesToremove)
{
operands.RemoveAt(i);
}
}
else if (criteriaOperator is ContainsOperator)
{
var containsOperator = (ContainsOperator)criteriaOperator;
CriteriaOperator condition = containsOperator.Condition;
Extract(condition);
}
return(criteriaOperator);
}