81 lines
2.3 KiB
Python
81 lines
2.3 KiB
Python
# Copyright 2014 Huawei Technologies Co. Ltd
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain 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,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""Utils for database usage."""
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import copy
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from functools import wraps
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def wrap_to_dict(support_keys=None):
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def decorator(func):
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@wraps(func)
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def wrapper(*args, **kwargs):
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obj = func(*args, **kwargs)
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obj_info = None
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if isinstance(obj, list):
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obj_info = [_wrapper_dict(o, support_keys) for o in obj]
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else:
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obj_info = _wrapper_dict(obj, support_keys)
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return obj_info
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return wrapper
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return decorator
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def _wrapper_dict(data, support_keys=None):
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"""Helper for warpping db object into dictionaryi."""
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if support_keys is None:
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return data
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info = {}
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for key in support_keys:
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if key in data:
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info[key] = data[key]
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return info
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def merge_dict(lhs, rhs, override=True):
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"""Merge nested right dict into left nested dict recursively.
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:param lhs: dict to be merged into.
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:type lhs: dict
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:param rhs: dict to merge from.
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:type rhs: dict
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:param override: the value in rhs overide the value in left if True.
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:type override: str
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:raises: TypeError if lhs or rhs is not a dict.
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"""
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if not rhs:
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return
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if not isinstance(lhs, dict):
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raise TypeError('lhs type is %s while expected is dict' % type(lhs),
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lhs)
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if not isinstance(rhs, dict):
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raise TypeError('rhs type is %s while expected is dict' % type(rhs),
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rhs)
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for key, value in rhs.items():
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if (
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isinstance(value, dict) and key in lhs and
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isinstance(lhs[key], dict)
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):
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merge_dict(lhs[key], value, override)
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else:
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if override or key not in lhs:
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lhs[key] = copy.deepcopy(value)
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