def load(self, uuid):
"""Loads `uuid` from current storage and return it as a new instance."""
uuid = dlite.get_uuid(uuid)
q = sql.SQL('SELECT meta FROM uuidtable WHERE uuid = %s')
self.cur.execute(q, [uuid])
metaid, = self.cur.fetchone()
q = sql.SQL('SELECT * FROM {} WHERE uuid = %s').format(
sql.Identifier(metaid))
self.cur.execute(q, [uuid])
tokens = self.cur.fetchone()
uuid_, uri, metaid_, dims = tokens[:4]
values = tokens[4:]
assert uuid_ == uuid
assert metaid_ == metaid
# Make sure we have metadata object correcponding to metaid
try:
with dlite.err():
meta = dlite.get_instance(metaid)
except RuntimeError:
dlite.errclr()
meta = self.load(metaid)
inst = dlite.Instance.create_from_metaid(metaid, dims, uri)
for i, p in enumerate(inst.meta['properties']):
inst.set_property(p.name, values[i])
# The uuid will be wrong for data instances, so override it
if not inst.is_metameta:
d = inst.asdict()
d['uuid'] = uuid
inst = instance_from_dict(d)
return inst
def find_label(self, inst):
"""Returns label for class instance `inst` already added to the
collection."""
if hasattr(inst, 'uuid'):
uuid = inst.uuid
else:
uuid = dlite.get_uuid(inst)
rel = self.coll.find_first(p='_has-uuid', o=uuid)
if not rel:
raise ValueError('no class instance with UUID: %s' % uuid)
return rel.s
def load(self, uuid):
"""Loads `uuid` from current storage and return it as a new instance."""
uuid = dlite.get_uuid(uuid)
q = sql.SQL('SELECT meta FROM uuidtable WHERE uuid = %s')
self.cur.execute(q, [uuid])
metaid, = self.cur.fetchone()
q = sql.SQL('SELECT * FROM {} WHERE uuid = %s').format(
sql.Identifier(metaid))
self.cur.execute(q, [uuid])
tokens = self.cur.fetchone()
uuid_, uri, metaid_, dims = tokens[:4]
values = tokens[4:]
assert uuid_ == uuid
assert metaid_ == metaid
inst = dlite.Instance(metaid, dims, uri)
for i, p in enumerate(inst.meta['properties']):
inst.set_property(p.name, values[i])
return inst
def get_uuid(self, uri=None):
"""Returns a UUID corresponding to `uri`. If `uri` is None,
a random UUID is returned."""
return dlite.get_uuid(uri)
#!/usr/bin/env python
# -*- coding: utf-8 -*-
import dlite
assert dlite.get_uuid_version() == 4
assert dlite.get_uuid_version('abc') == 5
assert dlite.get_uuid_version('6cb8e707-0fc5-5f55-88d4-d4fed43e64a8') == 0
assert dlite.get_uuid('abc') == '6cb8e707-0fc5-5f55-88d4-d4fed43e64a8'
assert dlite.get_uuid('6cb8e707-0fc5-5f55-88d4-d4fed43e64a8') == (
'6cb8e707-0fc5-5f55-88d4-d4fed43e64a8')
assert dlite.join_meta_uri('name', 'version', 'ns') == 'ns/version/name'
assert dlite.split_meta_uri('ns/version/name') == ['name', 'version', 'ns']
assert dlite.join_url('driver', 'loc', 'mode=r', 'fragment') == (
'driver://loc?mode=r#fragment')
assert dlite.join_url('driver', 'loc', 'mode=r') == 'driver://loc?mode=r'
assert dlite.join_url('driver', 'loc') == 'driver://loc'
assert dlite.join_url('driver', 'loc', fragment='frag') == 'driver://loc#frag'
assert dlite.split_url('driver://loc?mode=r#fragment') == [
'driver', 'loc', 'mode=r', 'fragment']
assert dlite.split_url('driver://loc?mode=r&verbose=1') == [
'driver', 'loc', 'mode=r&verbose=1', '']
assert dlite.split_url('driver://loc#fragment') == [
'driver', 'loc', '', 'fragment']
assert dlite.split_url('loc#fragment') == [
'', 'loc', '', 'fragment']