public PossibleSelections CollectFields(
INamedOutputType type,
SelectionSetNode selectionSet,
Path path)
{
if (!_cache.TryGetValue(type, out SelectionCache? selectionCache))
{
selectionCache = new SelectionCache();
_cache.Add(type, selectionCache);
}
if (!selectionCache.TryGetValue(
selectionSet,
out PossibleSelections? possibleSelections))
{
SelectionInfo returnType =
CollectFieldsInternal(type, selectionSet, path);
if (type.IsAbstractType())
{
var list = new List <SelectionInfo>();
bool singleModelShape = true;
foreach (ObjectType objectType in _schema.GetPossibleTypes(type))
{
SelectionInfo objectSelection =
CollectFieldsInternal(objectType, selectionSet, path);
list.Add(objectSelection);
if (!FieldSelectionsAreEqual(
returnType.Fields,
objectSelection.Fields))
{
singleModelShape = false;
}
}
if (!singleModelShape)
{
possibleSelections = new PossibleSelections(returnType, list);
}
}
if (possibleSelections is null)
{
possibleSelections = new PossibleSelections(returnType);
}
selectionCache.Add(selectionSet, possibleSelections);
}
return(possibleSelections);
}