From 73b10e37fdcb141f73eb657dccf0c15b273c2128 Mon Sep 17 00:00:00 2001
From: Eugene M <ymatviych@bnl.gov>
Date: Fri, 14 Feb 2025 15:32:09 -0500
Subject: [PATCH] ENH: accept str for dataset in HDF5ArrayAdapter

---
 tiled/adapters/hdf5.py | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/tiled/adapters/hdf5.py b/tiled/adapters/hdf5.py
index d38f961e7..150dfbe3a 100644
--- a/tiled/adapters/hdf5.py
+++ b/tiled/adapters/hdf5.py
@@ -126,7 +126,8 @@ def __init__(
     @classmethod
     def from_catalog(
         cls,
-        data_source: DataSource,
+        # An HDF5 node may reference a dataset (array) or group (container).
+        data_source: DataSource[Union[ArrayStructure, None]],
         node: Node,
         /,
         swmr: bool = SWMR_DEFAULT,
@@ -154,6 +155,8 @@ def from_catalog(
             specs=node.specs,
         )
         dataset = kwargs.get("dataset") or kwargs.get("path") or []
+        if isinstance(dataset, str):
+            dataset = dataset.split('/')
         for segment in dataset:
             adapter = adapter.get(segment)  # type: ignore
             if adapter is None:
@@ -345,7 +348,7 @@ def from_catalog(
         data_source: DataSource,
         node: Node,
         /,
-        dataset: Optional[list[str]] = None,
+        dataset: Optional[str] = None,
         slice: Optional[str | Tuple[Union[int, builtins.slice, EllipsisType], ...]] = None,
         squeeze: bool = False,
         swmr: bool = SWMR_DEFAULT,
@@ -363,8 +366,6 @@ def from_catalog(
 
         structure = data_source.structure
         file_paths = [path_from_uri(ast.data_uri) for ast in data_source.assets]
-        if dataset is not None:
-            dataset = "/".join(dataset)
 
         array = cls.lazy_load_hdf5_array(
             *file_paths, dataset=dataset, swmr=swmr, libver=libver
@@ -410,6 +411,7 @@ def from_uris(
         **kwargs: Optional[Any],
     ) -> "HDF5ArrayAdapter":
         file_paths = [path_from_uri(uri) for uri in data_uris]
+
         array = cls.lazy_load_hdf5_array(
             *file_paths, dataset=dataset, swmr=swmr, libver=libver
         )