protected override Expression VisitMethodCall(MethodCallExpression node)
{
if (!_isClientSideProjection && EmbeddedPipelineBinder.SupportsNode(node))
{
return(BindEmbeddedPipeline(node));
}
switch (node.Method.Name)
{
case "ElementAt":
return(BindElementAt(node));
case "get_Item":
return(BindGetItem(node));
}
// Select and SelectMany are the only supported client-side projection operators
if (_isClientSideProjection &&
ExpressionHelper.IsLinqMethod(node, "Select", "SelectMany") &&
node.Arguments.Count == 2)
{
return(BindClientSideProjector(node));
}
return(base.VisitMethodCall(node));
}
private Expression BindEmbeddedPipeline(MethodCallExpression node)
{
var oldIsInEmbeddedPipeline = _isInEmbeddedPipeline;
_isInEmbeddedPipeline = true;
node = node.Update(
Visit(node.Object),
Visit(node.Arguments));
_isInEmbeddedPipeline = oldIsInEmbeddedPipeline;
if (_isInEmbeddedPipeline)
{
return(node);
}
return(EmbeddedPipelineBinder.Bind(node, _bindingContext));
}
private Expression BindEmbeddedPipeline(MethodCallExpression node)
{
var oldIsInEmbeddedPipeline = _isInEmbeddedPipeline;
_isInEmbeddedPipeline = true;
node = node.Update(
Visit(node.Object),
Visit(node.Arguments));
_isInEmbeddedPipeline = oldIsInEmbeddedPipeline;
if (_isInEmbeddedPipeline)
{
return(node);
}
// we need to discover if this is rooted at an IMongoQueryable... If so, it
// gets processed as a top-level pipeline...
return(EmbeddedPipelineBinder.Bind(node, _bindingContext));
}
