private static IMongoQuery QuantityQuery(String parameterName, Operator optor, String modifier, ValueExpression operand)
{
var quantity = operand.ToModelQuantity();
Fhir.Metrics.Quantity q = quantity.ToUnitsOfMeasureQuantity().Canonical();
string decimals = UnitsOfMeasureHelper.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);
}
private static FilterDefinition <BsonDocument> QuantityQuery(String parameterName, Operator optor, String modifier, ValueExpression operand)
{
//$elemMatch only works on array values. But the MongoIndexMapper only creates an array if there are multiple values for a given parameter.
//So we also construct a query for when there is only one set of values in the searchIndex, hence there is no array.
var quantity = operand.ToModelQuantity();
Fhir.Metrics.Quantity q = quantity.ToUnitsOfMeasureQuantity().Canonical();
string decimals = q.SearchableString();
BsonValue value = q.GetValueAsBson();
List <FilterDefinition <BsonDocument> > arrayQueries = new List <FilterDefinition <BsonDocument> >();
List <FilterDefinition <BsonDocument> > noArrayQueries = new List <FilterDefinition <BsonDocument> >()
{
Builders <BsonDocument> .Filter.Not(Builders <BsonDocument> .Filter.Type(parameterName, BsonType.Array))
};
switch (optor)
{
case Operator.EQ:
arrayQueries.Add(Builders <BsonDocument> .Filter.Regex("decimals", new BsonRegularExpression("^" + decimals)));
noArrayQueries.Add(Builders <BsonDocument> .Filter.Regex(parameterName + ".decimals", new BsonRegularExpression("^" + decimals)));
break;
default:
arrayQueries.Add(ExpressionQuery("value", optor, value));
noArrayQueries.Add(ExpressionQuery(parameterName + ".value", optor, value));
break;
}
if (quantity.System != null)
{
arrayQueries.Add(Builders <BsonDocument> .Filter.Eq("system", quantity.System.ToString()));
noArrayQueries.Add(Builders <BsonDocument> .Filter.Eq(parameterName + ".system", quantity.System.ToString()));
}
arrayQueries.Add(Builders <BsonDocument> .Filter.Eq("unit", q.Metric.ToString()));
noArrayQueries.Add(Builders <BsonDocument> .Filter.Eq(parameterName + ".unit", q.Metric.ToString()));
var arrayQuery = Builders <BsonDocument> .Filter.ElemMatch(parameterName, Builders <BsonDocument> .Filter.And(arrayQueries));
var noArrayQuery = Builders <BsonDocument> .Filter.And(noArrayQueries);
FilterDefinition <BsonDocument> query = Builders <BsonDocument> .Filter.Or(arrayQuery, noArrayQuery);
return(query);
}
