private static IMongoQuery QuantityQuery(String parameterName, Operator optor, String modifier, ValueExpression operand)
{
var quantity = operand.ToModelQuantity();
Fhir.Metrics.Quantity q = quantity.ToSystemQuantity().Canonical();
string decimals = Units.SearchableString(q);
BsonValue value = q.GetValueAsBson();
List <IMongoQuery> queries = new List <IMongoQuery>();
switch (optor)
{
case Operator.EQ:
queries.Add(M.Query.Matches("decimals", new BsonRegularExpression("^" + decimals)));
break;
default:
queries.Add(ExpressionQuery("value", optor, value));
break;
}
if (quantity.System != null)
{
queries.Add(M.Query.EQ("system", quantity.System.ToString()));
}
queries.Add(M.Query.EQ("unit", q.Metric.ToString()));
IMongoQuery query = M.Query.ElemMatch(parameterName, M.Query.And(queries));
return(query);
}
