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53 lines
1.8 KiB
53 lines
1.8 KiB
8 months ago
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import traceback
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from autotest_lib.tko import status_lib, utils as tko_utils
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class parser(object):
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"""
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Abstract parser base class. Provides a generic implementation of the
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standard parser interfaction functions. The derived classes must
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implement a state_iterator method for this class to be useful.
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"""
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def start(self, job):
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""" Initialize the parser for processing the results of
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'job'."""
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# initialize all the basic parser parameters
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self.job = job
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self.finished = False
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self.line_buffer = status_lib.line_buffer()
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# create and prime the parser state machine
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self.state = self.state_iterator(self.line_buffer)
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next(self.state)
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def end(self, lines=[]):
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""" Feed 'lines' into the parser state machine, signal to the
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state machine that no more lines are forthcoming, and then
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return a list of all the new test results produced."""
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self.line_buffer.put_multiple(lines)
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# run the state machine to clear out the buffer
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self.finished = True
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try:
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return next(self.state)
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except StopIteration:
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msg = ("WARNING: parser was end()ed multiple times\n"
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"Current traceback:\n" +
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traceback.format_exc() +
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"\nCurrent stack:\n" +
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"".join(traceback.format_stack()))
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tko_utils.dprint(msg)
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return []
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@staticmethod
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def make_job(dir):
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""" Create a new instance of the job model used by the
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parser, given a results directory."""
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raise NotImplementedError
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def state_iterator(self, buffer):
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""" A generator method that implements the actual parser
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state machine. """
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raise NotImplementedError
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