/// <inheritdoc/>
public override bool TryHandleLeave(
MongoDbProjectionVisitorContext context,
ISelection selection,
[NotNullWhen(true)] out ISelectionVisitorAction?action)
{
context.Path.Pop();
action = SelectionVisitor.Continue;
return(true);
}
/// <inheritdoc/>
public override bool TryHandleEnter(
MongoDbProjectionVisitorContext context,
ISelection selection,
[NotNullWhen(true)] out ISelectionVisitorAction?action)
{
IObjectField field = selection.Field;
context.Path.Push(field.GetName());
action = SelectionVisitor.Continue;
return(true);
}
public static bool TryCreateQuery(
this MongoDbProjectionVisitorContext context,
[NotNullWhen(true)] out MongoDbProjectionDefinition?query)
{
query = null;
if (context.Projections.Count == 0)
{
return(false);
}
query = new MongoDbCombinedProjectionDefinition(context.Projections.ToArray());
return(true);
}
/// <inheritdoc/>
public override bool TryHandleEnter(
MongoDbProjectionVisitorContext context,
ISelection selection,
out ISelectionVisitorAction?action)
{
IObjectField field = selection.Field;
context.Path.Push(field.GetName());
context.Projections.Push(
new MongoDbIncludeProjectionOperation(context.GetPath()));
context.Path.Pop();
action = SelectionVisitor.SkipAndLeave;
return(true);
}
public static string GetPath(this MongoDbProjectionVisitorContext ctx) =>
string.Join(".", ctx.Path.Reverse());
