def write_iso19115_metadata(layer_uri, keywords, version_35=False):
"""Create metadata object from a layer path and keywords dictionary.
This function will save these keywords to the file system or the database.
:param version_35: If we write keywords version 3.5. Default to False.
:type version_35: bool
:param layer_uri: Uri to layer.
:type layer_uri: basestring
:param keywords: Dictionary of keywords.
:type keywords: dict
"""
active_metadata_classes = METADATA_CLASSES
if version_35:
active_metadata_classes = METADATA_CLASSES35
if 'layer_purpose' in keywords:
if keywords['layer_purpose'] in active_metadata_classes:
metadata = active_metadata_classes[
keywords['layer_purpose']](layer_uri)
else:
LOGGER.info(
'The layer purpose is not supported explicitly. It will use '
'generic metadata. The layer purpose is %s' %
keywords['layer_purpose'])
if version_35:
metadata = GenericLayerMetadata35(layer_uri)
else:
metadata = GenericLayerMetadata(layer_uri)
else:
if version_35:
metadata = GenericLayerMetadata35(layer_uri)
else:
metadata = GenericLayerMetadata(layer_uri)
metadata.update_from_dict(keywords)
# Always set keyword_version to the latest one.
if not version_35:
metadata.update_from_dict({'keyword_version': inasafe_keyword_version})
if metadata.layer_is_file_based:
xml_file_path = os.path.splitext(layer_uri)[0] + '.xml'
metadata.write_to_file(xml_file_path)
else:
metadata.write_to_db()
return metadata
def read_iso19115_metadata(layer_uri, keyword=None, version_35=False):
"""Retrieve keywords from a metadata object
:param layer_uri: Uri to layer.
:type layer_uri: basestring
:param keyword: The key of keyword that want to be read. If None, return
all keywords in dictionary.
:returns: Dictionary of keywords or value of key as string.
:rtype: dict, basestring
"""
xml_uri = os.path.splitext(layer_uri)[0] + '.xml'
if not os.path.exists(xml_uri):
xml_uri = None
if not xml_uri and os.path.exists(layer_uri):
message = 'Layer based file but no xml file.\n'
message += 'Layer path: %s.' % layer_uri
raise NoKeywordsFoundError(message)
metadata = GenericLayerMetadata(layer_uri, xml_uri)
if version_35:
metadata = GenericLayerMetadata35(layer_uri, xml_uri)
else:
metadata = GenericLayerMetadata(layer_uri, xml_uri)
active_metadata_classes = METADATA_CLASSES
if version_35:
active_metadata_classes = METADATA_CLASSES35
if metadata.layer_purpose in active_metadata_classes:
metadata = active_metadata_classes[metadata.layer_purpose](layer_uri,
xml_uri)
# dictionary comprehension
keywords = {
x[0]: x[1]['value']
for x in metadata.dict['properties'].iteritems()
if x[1]['value'] is not None
}
if 'keyword_version' not in keywords.keys() and xml_uri:
message = 'No keyword version found. Metadata xml file is invalid.\n'
message += 'Layer uri: %s\n' % layer_uri
message += 'Keywords file: %s\n' % os.path.exists(
os.path.splitext(layer_uri)[0] + '.xml')
message += 'keywords:\n'
for k, v in keywords.iteritems():
message += '%s: %s\n' % (k, v)
raise MetadataReadError(message)
# Get dictionary keywords that has value != None
keywords = {
x[0]: x[1]['value']
for x in metadata.dict['properties'].iteritems()
if x[1]['value'] is not None
}
if keyword:
try:
return keywords[keyword]
except KeyError:
message = 'Keyword with key %s is not found. ' % keyword
message += 'Layer path: %s' % layer_uri
raise KeywordNotFoundError(message)
if isinstance(metadata, OutputLayerMetadata):
keywords['if_provenance'] = metadata.provenance
return keywords