public override RenderedPipelineDefinition <TOutput> Render(IBsonSerializer <TInput> inputSerializer, IBsonSerializerRegistry serializerRegistry)
{
var rendered = _wrapped.Render(inputSerializer, serializerRegistry);
// do some combining of $match documents if possible. This is optimized for the
// OfType case where we've added a discriminator as a match at the beginning of the pipeline.
if (rendered.Documents.Count > 1)
{
var firstStage = rendered.Documents[0].GetElement(0);
var secondStage = rendered.Documents[1].GetElement(0);
if (firstStage.Name == "$match" && secondStage.Name == "$match")
{
var combinedFilter = Builders <BsonDocument> .Filter.And(
(BsonDocument)firstStage.Value,
(BsonDocument)secondStage.Value);
var combinedStage = new BsonDocument("$match", combinedFilter.Render(BsonDocumentSerializer.Instance, serializerRegistry));
rendered.Documents[0] = combinedStage;
rendered.Documents.RemoveAt(1);
}
}
return(rendered);
}
// private static methods
private static RenderedPipelineDefinition <TResult> RenderPipeline <TResult, TDocument>(
PipelineDefinition <ChangeStreamDocument <TDocument>, TResult> pipeline,
IBsonSerializer <TDocument> documentSerializer)
{
var changeStreamDocumentSerializer = new ChangeStreamDocumentSerializer <TDocument>(documentSerializer);
var serializerRegistry = BsonSerializer.SerializerRegistry;
return(pipeline.Render(changeStreamDocumentSerializer, serializerRegistry));
}
/// <inheritdoc />
public override RenderedPipelineDefinition <TOutput> Render(IBsonSerializer <TInput> inputSerializer, IBsonSerializerRegistry serializerRegistry)
{
var renderedFirst = _first.Render(inputSerializer, serializerRegistry);
var renderedSecond = _second.Render(renderedFirst.OutputSerializer, serializerRegistry);
return(new RenderedPipelineDefinition <TOutput>(
renderedFirst.Documents.Concat(renderedSecond.Documents),
renderedSecond.OutputSerializer));
}
private CreateViewOperation CreateCreateViewOperation <TDocument, TResult>(string viewName, string viewOn, PipelineDefinition <TDocument, TResult> pipeline, CreateViewOptions <TDocument> options)
{
var serializerRegistry = options.SerializerRegistry ?? BsonSerializer.SerializerRegistry;
var documentSerializer = options.DocumentSerializer ?? serializerRegistry.GetSerializer <TDocument>();
var pipelineDocuments = pipeline.Render(documentSerializer, serializerRegistry, _linqProvider).Documents;
return(new CreateViewOperation(_databaseNamespace, viewName, viewOn, pipelineDocuments, GetMessageEncoderSettings())
{
Collation = options.Collation,
WriteConcern = _settings.WriteConcern
});
}
/// <summary>
/// Renders the update to a <see cref="BsonValue"/> that represents <see cref="BsonArray"/>.
/// </summary>
/// <param name="documentSerializer">The document serializer.</param>
/// <param name="serializerRegistry">The serializer registry.</param>
/// <param name="linqProvider">The LINQ provider.</param>
/// <returns>A <see cref="BsonValue"/>.</returns>
public override BsonValue Render(IBsonSerializer <TDocument> documentSerializer, IBsonSerializerRegistry serializerRegistry, LinqProvider linqProvider)
{
var renderedPipeline = _pipeline.Render(documentSerializer, serializerRegistry, linqProvider);
return(new BsonArray(renderedPipeline.Documents));
}
