def union_metadata(first, second):
"""
Union two metadata.
:param first: The first metadata object to union.
:param second: The other metadata object to union.
:return: A new metadata object.
"""
logger.debug("Union of metadata")
output = Metadata()
if first.version is not None:
output.version = union_version(first.version, second.version)
if first.description is not None:
output.description = union_description(first.description,
second.description)
output.scopes = set.union(set(first.scopes), set(first.scopes))
output.languages = set.union(set(first.languages),
set(second.languages))
output.date = date.today().isoformat()
output.validity_start = compare_objects(first.validity_start,
second.validity_start,
max)
output.validity_end = compare_objects(first.validity_end,
second.validity_end,
min)
output.unicode_version = compare_objects(first.unicode_version,
second.unicode_version,
max)
return output
def merge_metadata(lgr_set):
"""
Merge metadata from LGR set.
:param lgr_set: The LGRs in the set
:return: The merged metadata object
"""
logger.debug("Merge metadata")
output = Metadata()
output.version = merge_version(lgr_set)
output.description = merge_description(lgr_set)
scopes = OrderedDict()
languages = OrderedDict()
for metadata in [lgr.metadata for lgr in lgr_set]:
scopes.update(OrderedDict.fromkeys(metadata.scopes))
languages.update(OrderedDict.fromkeys(metadata.languages))
output.validity_start = compare_objects(output.validity_start,
metadata.validity_start, max)
output.validity_end = compare_objects(output.validity_end,
metadata.validity_end, min)
output.unicode_version = compare_objects(output.unicode_version,
metadata.unicode_version, max)
output.scopes = list(scopes.keys())
output.languages = list(languages.keys())
output.date = date.today().isoformat()
return output
def intersect_metadata(first, second):
"""
Intersect two metadata.
:param first: The first metadata object to intersect with.
:param second: The other metadata object to intersect with.
:return: A new metadata object.
"""
output = Metadata()
output.version = intersect_version(first.version, second.version)
output.description = intersect_description(first.description,
second.description)
output.scopes = set.intersection(set(first.scopes), set(first.scopes))
output.languages = set.intersection(set(first.languages),
set(second.languages))
output.date = date.today().isoformat()
output.validity_start = compare_objects(first.validity_start,
second.validity_start, max)
output.validity_end = compare_objects(first.validity_end,
second.validity_end, min)
output.unicode_version = compare_objects(first.unicode_version,
second.unicode_version, max)
return output