private Expression BindSelector(ProjectionExpression projection, ProjectionBindingContext context, Expression id, Expression node)
{
var lambda = ExtensionExpressionVisitor.GetLambda(node);
var binder = new AccumulatorBinder(context.GroupMap, context.SerializerRegistry);
var serializer = SerializerBuilder.Build(projection.Projector, context.SerializerRegistry);
var sequenceSerializer = (IBsonSerializer)Activator.CreateInstance(
typeof(ArraySerializer <>).MakeGenericType(projection.Projector.Type),
new object[] { serializer });
var sequenceInfo = new BsonSerializationInfo(
null,
sequenceSerializer,
sequenceSerializer.ValueType);
var sequenceExpression = new SerializationExpression(
lambda.Parameters[1],
sequenceInfo);
binder.RegisterParameterReplacement(lambda.Parameters[0], id);
binder.RegisterParameterReplacement(lambda.Parameters[1], sequenceExpression);
var correlationId = Guid.NewGuid();
context.GroupMap.Add(sequenceExpression, correlationId);
var bound = binder.Bind(lambda.Body);
return(CorrelatedAccumulatorRemover.Remove(bound, correlationId));
}
private static Expression BindGroup <TKey, TDocument, TResult>(PipelineBindingContext bindingContext, Expression <Func <IGrouping <TKey, TDocument>, TResult> > groupProjector, IBsonSerializer <TDocument> parameterSerializer, Expression keySelector)
{
var groupSerializer = new ArraySerializer <TDocument>(parameterSerializer);
var groupExpression = new DocumentExpression(groupSerializer);
var correlationId = Guid.NewGuid();
bindingContext.AddCorrelatingId(groupExpression, correlationId);
bindingContext.AddExpressionMapping(groupProjector.Parameters[0], groupExpression);
bindingContext.AddMemberMapping(typeof(IGrouping <TKey, TDocument>).GetProperty("Key"), keySelector);
var node = PartialEvaluator.Evaluate(groupProjector.Body);
node = Transformer.Transform(node);
node = bindingContext.Bind(node);
return(CorrelatedAccumulatorRemover.Remove(node, correlationId));
}
private Expression BindSelector(PipelineExpression pipeline, PipelineBindingContext bindingContext, Expression keySelector, Expression node)
{
var lambda = ExpressionHelper.GetLambda(node);
var serializer = bindingContext.GetSerializer(pipeline.Projector.Type, pipeline.Projector);
var sequenceSerializer = (IBsonSerializer)Activator.CreateInstance(
typeof(ArraySerializer <>).MakeGenericType(pipeline.Projector.Type),
new object[] { serializer });
var sequence = new DocumentExpression(sequenceSerializer);
var keySerializer = bindingContext.GetSerializer(keySelector.Type, keySelector);
Guid correlationId = Guid.NewGuid();
bindingContext.AddCorrelatingId(sequence, correlationId);
bindingContext.AddExpressionMapping(lambda.Parameters[0], new GroupingKeyExpression(keySelector, keySerializer));
bindingContext.AddExpressionMapping(lambda.Parameters[1], sequence);
var bound = bindingContext.Bind(lambda.Body);
return(CorrelatedAccumulatorRemover.Remove(bound, correlationId));
}
public static Expression Remove(Expression node, Guid correlationId)
{
var remover = new CorrelatedAccumulatorRemover(correlationId);
return(remover.Visit(node));
}
public static Expression Remove(Expression node, Guid correlationId)
{
var remover = new CorrelatedAccumulatorRemover(correlationId);
return remover.Visit(node);
}
