61 lines
2.4 KiB
Python
61 lines
2.4 KiB
Python
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# Copyright 2016-2017 Andreas Florath (andreas@florath.net)
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#
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# 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 logging
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logger = logging.getLogger(__name__)
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class TreeConfig(object):
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"""Supports simple tree-like configuration
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When using the new (complete) configuration there is a need to
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specify the complete digraph of block level configurations. This
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provides great flexibility for the cost of complex configurations:
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each and every single element must be completely specified. In
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many simple use cases the configuration flexibility is not
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needed.
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With the help of this object the simple to use and short tree-like
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configuration is converted automatically into the complete digraph
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configuration which can be used to create the block device
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elements.
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"""
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def __init__(self, type_string):
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self.type_string = type_string
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def config_tree_to_digraph(self, config_key, config_value, dconfig,
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default_base_name, plugin_manager):
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logger.debug("called [%s] [%s] [%s]"
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% (config_key, config_value, default_base_name))
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base_name = config_value['base'] if 'base' in config_value \
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else default_base_name
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name = config_value['name'] \
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if 'name' in config_value \
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else "%s_%s" % (config_key, base_name)
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assert config_key == self.type_string
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nconfig = {'base': base_name, 'name': name}
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for k, v in config_value.items():
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if k not in plugin_manager:
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nconfig[k] = v
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else:
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plugin_manager[k].plugin \
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.tree_config.config_tree_to_digraph(
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k, v, dconfig, name, plugin_manager)
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dconfig.append({self.type_string: nconfig})
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logger.debug("finished new [%s] complete [%s]" % (nconfig, dconfig))
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