def from_file(cls,
href: str,
stac_io: Optional[pystac.StacIO] = None) -> "Collection":
result = super().from_file(href, stac_io)
if not isinstance(result, Collection):
raise pystac.STACTypeError(f"{result} is not a {Collection}.")
return result
def from_dict(
cls,
d: Dict[str, Any],
href: Optional[str] = None,
root: Optional[Catalog] = None,
migrate: bool = False,
preserve_dict: bool = True,
) -> "Item":
if migrate:
info = identify_stac_object(d)
d = migrate_to_latest(d, info)
if not cls.matches_object_type(d):
raise pystac.STACTypeError(
f"{d} does not represent a {cls.__name__} instance")
if preserve_dict:
d = deepcopy(d)
id = d.pop("id")
geometry = d.pop("geometry")
properties = d.pop("properties")
bbox = d.pop("bbox", None)
stac_extensions = d.get("stac_extensions")
collection_id = d.pop("collection", None)
datetime = properties.get("datetime")
if datetime is not None:
datetime = str_to_datetime(datetime)
links = d.pop("links")
assets = d.pop("assets")
d.pop("type")
d.pop("stac_version")
item = cls(
id=id,
geometry=geometry,
bbox=bbox,
datetime=datetime,
properties=properties,
stac_extensions=stac_extensions,
collection=collection_id,
extra_fields=d,
assets={k: Asset.from_dict(v)
for k, v in assets.items()},
)
has_self_link = False
for link in links:
has_self_link |= link["rel"] == pystac.RelType.SELF
item.add_link(Link.from_dict(link))
if not has_self_link and href is not None:
item.add_link(Link.self_href(href))
if root:
item.set_root(root)
return item
def from_file(cls, href: str, stac_io: Optional[pystac.StacIO] = None) -> "Catalog":
if stac_io is None:
stac_io = pystac.StacIO.default()
result = super().from_file(href, stac_io)
if not isinstance(result, Catalog):
raise pystac.STACTypeError(f"{result} is not a {Catalog}.")
result._stac_io = stac_io
return result
def identify_stac_object(json_dict: Dict[str, Any]) -> STACJSONDescription:
"""Determines the STACJSONDescription of the provided JSON dict.
Args:
json_dict : The dict of STAC JSON to identify.
Returns:
STACJSONDescription: The description of the STAC object serialized in the
given dict.
"""
object_type = identify_stac_object_type(json_dict)
if object_type is None:
raise pystac.STACTypeError("JSON does not represent a STAC object.")
version_range = STACVersionRange()
stac_version = json_dict.get("stac_version")
stac_extensions = json_dict.get("stac_extensions", None)
if stac_version is None:
version_range.set_min(STACVersionID("0.8.0"))
else:
version_range.set_to_single(stac_version)
if stac_extensions is not None:
version_range.set_min(STACVersionID("0.8.0"))
if stac_extensions is None:
stac_extensions = []
# Between 1.0.0-beta.2 and 1.0.0-RC1, STAC extensions changed from
# being split between 'common' and custom extensions, with common
# extensions having short names that were used in the stac_extensions
# property list, to being mostly externalized from the core spec and
# always identified with the schema URI as the identifier. This
# code translates the short name IDs used pre-1.0.0-RC1 to the
# relevant extension schema uri identifier.
return STACJSONDescription(object_type, version_range,
set(stac_extensions))
