private static IMongoQuery QuantityQuery(String parameterName, Operator optor, String modifier, ValueExpression operand)
{
Quantity quantity = operand.ToQuantity().Standardize();
string decimals = quantity.GetDecimalSearchableValue();
List<IMongoQuery> queries = new List<IMongoQuery>();
switch (optor)
{
case Operator.EQ:
queries.Add(M.Query.Matches("decimals", new BsonRegularExpression("^" + decimals, "i")));
break;
default:
queries.Add(ExpressionQuery("value", optor, new BsonDouble((double)quantity.Value)));
break;
}
if (quantity.System != null)
queries.Add(M.Query.EQ("system", quantity.System.ToString()));
queries.Add(M.Query.EQ("unit", quantity.Units));
IMongoQuery query = M.Query.ElemMatch(parameterName, M.Query.And(queries));
return query;
}