mirror of
https://github.com/volatilityfoundation/volatility3.git
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42 lines
2.3 KiB
Python
42 lines
2.3 KiB
Python
"""An automagic module to use configuration data to configure and then construct classes that fulfill the descendants
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of a :class:`~volatility.framework.interfaces.configuration.ConfigurableInterface`."""
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import logging
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from volatility.framework import constants
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from volatility.framework import interfaces
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vollog = logging.getLogger(__name__)
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class ConstructionMagic(interfaces.automagic.AutomagicInterface):
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"""Class to run through the requirement tree of the :class:`~volatility.framework.interfaces.configuration.ConfigurableInterface`
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and from the bottom of the tree upwards, attempt to construct all
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:class:`~volatility.framework.interfaces.configuration.ConstructableRequirementInterface` based classes.
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:warning: This `automagic` should run first to allow existing configurations to have been constructed for use by later automagic
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"""
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priority = 0
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def __call__(self, context, config_path, requirement, progress_callback = None, optional = False):
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if not requirement.validate(context, config_path):
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# Having called validate at the top level tells us both that we need to dig deeper
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# but also ensures that TranslationLayerRequirements have got the correct subrequirements if their class is populated
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success = True
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subreq_config_path = interfaces.configuration.path_join(config_path, requirement.name)
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for subreq in requirement.requirements.values():
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self(context, subreq_config_path, subreq, optional or subreq.optional)
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valid = subreq.validate(context, subreq_config_path)
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# We want to traverse optional paths, so don't check until we've tried to validate
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# We also don't want to emit a debug message when a parent is optional, hence the optional parameter
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if not valid and not (optional or subreq.optional):
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vollog.log(constants.LOGLEVEL_V, "Failed on requirement: {}".format(subreq_config_path))
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success = False
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if not success:
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return False
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elif isinstance(requirement, interfaces.configuration.ConstructableRequirementInterface):
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# We know all the subrequirements are filled, so let's populate
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requirement.construct(context, config_path)
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return True
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