use string rather than bool

Author: TonioF

xcube/core/store/fs/store.py

@@ -469,7 +469,7 @@ def _set_infos_from_extensions(cls, find_extensions, protocol=None) -> (
             extensions = ext.metadata.get("extensions", [])
             for extension in extensions:
                 filename_ext_to_format[extension] = frmat
-            if ext.metadata.get("preferred", False):
+            if ext.metadata.get("suitability", "primary"):
                 format_to_data_type_aliases[frmat] = (
                     (data_type, ) + format_to_data_type_aliases.get(frmat, ())
                 )

xcube/plugin.py

@@ -91,20 +91,21 @@ def _register_dataset_ios(ext_registry: extension.ExtensionRegistry):
 )
 
 _FS_DATA_WRITER_ITEMS = (
-    ("dataset", "netcdf", "xarray.Dataset in NetCDF format", [".nc"], True),
-    ("dataset", "zarr", "xarray.Dataset in Zarr format", [".zarr"], True),
-    ("dataset", "levels", "xarray.Dataset in leveled Zarr format", [".levels"], False),
+    ("dataset", "netcdf", "xarray.Dataset in NetCDF format", [".nc"], "primary"),
+    ("dataset", "zarr", "xarray.Dataset in Zarr format", [".zarr"], "primary"),
+    ("dataset", "levels", "xarray.Dataset in leveled Zarr format",
+     [".levels"], "secondary"),
     (
         "mldataset",
         "levels",
         "xcube.core.mldataset.MultiLevelDataset in leveled Zarr format",
         [".levels"],
-        True
+        "primary"
     ),
     ("geodataframe", "shapefile", "gpd.GeoDataFrame in ESRI Shapefile format",
-     [".shp"], True),
+     [".shp"], "primary"),
     ("geodataframe", "geojson", "gpd.GeoDataFrame in GeoJSON format",
-     [".geojson"], True),
+     [".geojson"], "primary"),
 )
 
 _FS_DATA_OPENER_ITEMS = _FS_DATA_WRITER_ITEMS + (
@@ -113,14 +114,14 @@ def _register_dataset_ios(ext_registry: extension.ExtensionRegistry):
         "geotiff",
         "xarray.Dataset in GeoTIFF or COG format",
         [".tif", ".tiff", ".geotiff"],
-        False
+        "secondary"
     ),
     (
         "mldataset",
         "geotiff",
         "xcube.core.mldataset.MultiLevelDataset in GeoTIFF or COG format",
         [".tif", ".tiff", ".geotiff"],
-        True
+        "primary"
     )
 )
 
@@ -156,7 +157,7 @@ def _register_data_accessors(ext_registry: extension.ExtensionRegistry):
     # noinspection PyShadowingNames
     def _add_fs_data_accessor_ext(
         point: str, ext_type: str, protocol: str, data_type: str, format_id: str,
-        file_extensions: List[str], preferred: bool
+        file_extensions: List[str], suitability: str
     ):
         factory_args = (protocol, data_type, format_id)
         loader = extension.import_component(factory, call_args=factory_args)
@@ -168,21 +169,21 @@ def _add_fs_data_accessor_ext(
             f" a {data_accessor_description}"
             f" in {storage_description}",
             extensions=file_extensions,
-            preferred=preferred
+            suitability=suitability
         )
 
     for protocol, storage_description in _FS_STORAGE_ITEMS:
         for (data_type, format_id, data_accessor_description,
-             file_extensions, preferred) in _FS_DATA_OPENER_ITEMS:
+             file_extensions, suitability) in _FS_DATA_OPENER_ITEMS:
             _add_fs_data_accessor_ext(
                 EXTENSION_POINT_DATA_OPENERS, "opener", protocol, data_type,
-                format_id, file_extensions, preferred
+                format_id, file_extensions, suitability
             )
         for (data_type, format_id, data_accessor_description,
-             file_extensions, preferred) in _FS_DATA_WRITER_ITEMS:
+             file_extensions, suitability) in _FS_DATA_WRITER_ITEMS:
             _add_fs_data_accessor_ext(
                 EXTENSION_POINT_DATA_WRITERS, "writer", protocol, data_type,
-                format_id, file_extensions, preferred
+                format_id, file_extensions, suitability
             )
     ref_ds_cls = "xcube.core.store.ref.store:ReferenceDataStore"
     ref_ds_cls_loader = extension.import_component(ref_ds_cls)