public ICollection <BsonDocument> Execute()
{
var outputType = _pipelineStageDefinition.OutputType;
if (outputType == typeof(BsonDocument))
{
var serializer = BsonSerializer.SerializerRegistry.GetSerializer <BsonDocument>();
var renderedStage = _pipelineStageDefinition.Render(serializer, BsonSerializer.SerializerRegistry);
var matchCondition = renderedStage.Document.GetElement(_pipelineStageDefinition.OperatorName).Value;
FilterDefinition <BsonDocument> filter = matchCondition.ToString();
var filterBson = filter.Render(serializer, BsonSerializer.SerializerRegistry);
var parsedFilter = FilterParser.Instance.Parse(filterBson);
return(new BsonDocumentCollection(_documents.Where(parsedFilter.Filter)));
}
else
{
var renderedStage = _pipelineStageDefinition.Render(_bsonSerializer, BsonSerializer.SerializerRegistry);
var matchCondition = renderedStage.Document.GetElement(_pipelineStageDefinition.OperatorName).Value;
FilterDefinition <TDocument> filter = matchCondition.ToString();
var serializer = BsonSerializer.SerializerRegistry.GetSerializer <TDocument>();
var filterBson = filter.Render(serializer, BsonSerializer.SerializerRegistry);
var parsedFilter = FilterParser.Instance.Parse(filterBson);
return(new BsonDocumentCollection(_documents.Where(parsedFilter.Filter)));
}
}
public ICollection <BsonDocument> Execute()
{
var serializer = BsonSerializer.SerializerRegistry.GetSerializer <BsonDocument>();
var renderedStage = _pipelineStageDefinition.Render(serializer, BsonSerializer.SerializerRegistry);
var projections = renderedStage.Document.GetElement(renderedStage.OperatorName).Value.AsBsonDocument;
ICollection <BsonDocument> result = new BsonDocumentCollection();
foreach (var document in _documents)
{
BsonDocument projectedDocument = new BsonDocument();
for (int i = 0; i < projections.Names.Count(); i++)
{
var whatToTake = projections.Values.ElementAt(i);
if (whatToTake.IsString && whatToTake.AsString.StartsWith("$"))
{
var projectedValue = document.Find(whatToTake.AsString.Remove(0, 1));
projectedDocument.Add(projections.Names.ElementAt(i), projectedValue);
}
else
{
projectedDocument.Add(projections.Names.ElementAt(i), whatToTake.AsBsonValue);
}
}
result.Add(projectedDocument);
}
return(result);
}
public ICollection <BsonDocument> Execute()
{
ICollection <BsonDocument> result = new BsonDocumentCollection();
var serializer = BsonSerializer.SerializerRegistry.GetSerializer(_pipelineStageDefinition.OutputType);
var renderedStage = _pipelineStageDefinition.Render(serializer, BsonSerializer.SerializerRegistry);
var limit = renderedStage.Document.GetElement(renderedStage.OperatorName).Value.AsInt32;
foreach (var document in _documents.Take(limit))
{
result.Add(document);
}
return(result);
}
public ICollection <BsonDocument> Execute()
{
ICollection <BsonDocument> result = new BsonDocumentCollection();
var renderedStage = _pipelineStageDefinition.Render(_bsonSerializer, BsonSerializer.SerializerRegistry);
var fieldForUnwind = renderedStage.Document.GetElement("$unwind").Value.AsString.Remove(0, 1);
foreach (var document in _documents)
{
if (document.AsBsonDocument.Contains(fieldForUnwind) && document.AsBsonDocument[fieldForUnwind].IsBsonArray)
{
for (int i = 0; i < document.AsBsonDocument[fieldForUnwind].AsBsonArray.Count; i++)
{
var unwindedDocument = new BsonDocument(document.AsBsonDocument);
unwindedDocument[fieldForUnwind] = unwindedDocument[fieldForUnwind][i];
result.Add(unwindedDocument.AsBsonDocument);
}
}
}
return(result);
}
