45 lines
1.3 KiB
Python
45 lines
1.3 KiB
Python
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#!/usr/bin/python3
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# -*- coding: utf-8 -*-
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# Copyright (c) 2019 Huawei Technologies Co., Ltd.
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# A-Tune is licensed under the Mulan PSL v1.
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# You can use this software according to the terms and conditions of the Mulan PSL v1.
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# You may obtain a copy of Mulan PSL v1 at:
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# http://license.coscl.org.cn/MulanPSL
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# THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND, EITHER EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT, MERCHANTABILITY OR FIT FOR A PARTICULAR
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# PURPOSE.
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# See the Mulan PSL v1 for more details.
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# Create: 2019-10-29
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"""
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Load a parser from its name.
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"""
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import parser.base
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_NAMESPASE = "parser"
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_PREFIX = ""
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_SUFFIX = "_parser"
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_INTERFACE = parser.base.Parser
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def load_parser(parser_name):
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"""load a parser from its name.
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@param parser_name: the name of the parser to load
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@return: class of the parser to load
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"""
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module_name = "{}.{}{}{}".format(_NAMESPASE, _PREFIX, parser_name.replace("-", "_"), _SUFFIX)
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module = __import__(module_name)
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path = module_name.split(".")
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path.pop(0)
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while path:
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module = getattr(module, path.pop(0))
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for name in dir(module):
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cls = getattr(module, name)
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if issubclass(cls, _INTERFACE):
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return cls
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return ImportError("Can not find the parser class")
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