b2a878e536
Now it is able to add, update, delete keys in resource definition content. Change-Id: I9624f97bf35eae15d6a7ddc2d5d42768292db4f0
119 lines
4.4 KiB
Python
119 lines
4.4 KiB
Python
# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import copy
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from tuning_box import errors
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class KeysOperationMixin(object):
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OPERATION_SET = 'set'
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OPERATION_DELETE = 'delete'
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OPERATIONS = (OPERATION_SET, OPERATION_DELETE)
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def _check_out_of_index(self, cur_point, key, keys_path):
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if isinstance(cur_point, (list, tuple)) and key >= len(cur_point):
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raise errors.KeysPathNotExisted(
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"Keys path doesn't exist {0}. "
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"Failed on the key {1}".format(keys_path, key)
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)
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def _check_key_existed(self, cur_point, key, keys_path):
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if isinstance(cur_point, dict) and key not in cur_point:
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raise errors.KeysPathNotExisted(
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"Keys path doesn't exist {0}. "
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"Failed on the key {1}".format(keys_path, key)
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)
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def _check_path_is_reachable(self, cur_point, key, keys_path):
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if not isinstance(cur_point, (list, tuple, dict)):
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raise errors.KeysPathUnreachable(
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"Leaf value {0} found on key {1} "
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"in keys path {2}".format(cur_point, key, keys_path)
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)
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def do_set(self, storage, keys_paths):
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"""Sets values from keys paths to storage.
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Keys path is list of keys paths. If we have keys_paths
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[['a', 'b', 'val']], then storage['a']['b'] will be set to 'val'.
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Last value in the keys path is value to be set.
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:param storage: original data
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:param keys_paths: lists of keys paths to be set
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:returns: result of merging keys_paths and storage
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"""
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storage_copy = copy.deepcopy(storage)
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for keys_path in keys_paths:
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cur_point = storage_copy
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if len(keys_path) < 2:
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raise errors.KeysPathInvalid(
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"Keys path {0} invalid. Keys path should contain "
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"at least one key and value".format(keys_path)
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)
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for key in keys_path[:-2]:
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self._check_path_is_reachable(cur_point, key, keys_path)
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self._check_out_of_index(cur_point, key, keys_path)
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self._check_key_existed(cur_point, key, keys_path)
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cur_point = cur_point[key]
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assign_to = keys_path[-2]
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self._check_out_of_index(cur_point, assign_to, keys_path)
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cur_point[assign_to] = keys_path[-1]
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return storage_copy
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def do_delete(self, storage, keys_paths):
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"""Deletes keys paths from storage.
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Keys path is list of keys paths. If we have keys_paths
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[['a', 'b']], then storage['a']['b'] will be removed.
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:param storage: data
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:param keys_paths: lists of keys paths to be deleted
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:returns: result of keys_paths deletion from storage
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"""
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storage_copy = copy.deepcopy(storage)
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for keys_path in keys_paths:
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cur_point = storage_copy
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if not keys_path:
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continue
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try:
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for key in keys_path[:-1]:
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cur_point = cur_point[key]
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key = keys_path[-1]
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self._check_path_is_reachable(cur_point, key, keys_path)
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del cur_point[key]
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except (KeyError, IndexError):
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raise errors.KeysPathNotExisted(
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"Keys path doesn't exist {0}. "
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"Failed on the key {1}".format(keys_path, key)
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)
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return storage_copy
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def perform_operation(self, operation, storage, keys_paths):
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if operation == self.OPERATION_SET:
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return self.do_set(storage, keys_paths)
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elif operation == self.OPERATION_DELETE:
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return self.do_delete(storage, keys_paths)
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else:
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raise errors.UnknownKeysOperation(
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"Unknown operation: {0}. "
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"Allowed operations: {1}".format(operation, self.OPERATIONS)
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)
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