bzr branch
http://gegoxaren.bato24.eu/bzr/brz/remove-bazaar
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0.64.1
by Ian Clatworthy
1st cut: gfi parser + --info processing method |
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# Copyright (C) 2008 Canonical Ltd
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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"""Processor of import commands.
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This module provides core processing functionality including an abstract class
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for basing real processors on. See the processors package for examples.
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"""
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import errors |
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class ImportProcessor(object): |
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"""Base class for import processors. |
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Subclasses should override the pre_*, post_* and *_handler
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methods as appropriate.
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"""
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def __init__(self, target, verbose=False): |
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self.target = target |
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self.verbose = verbose |
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def process(self, command_iter): |
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"""Import data into Bazaar by processing a stream of commands. |
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:param command_iter: an iterator providing commands
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"""
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self.pre_process() |
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for cmd in command_iter(): |
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try: |
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handler = self.__class__.__dict__[cmd.name + "_handler"] |
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except KeyError: |
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raise errors.MissingHandler(cmd.name) |
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else: |
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# TODO: put hooks around processing each command?
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handler(self, cmd) |
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self.post_process() |
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def pre_process(self): |
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"""Hook for logic at start of processing.""" |
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pass
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def post_process(self): |
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"""Hook for logic at end of processing.""" |
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pass
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def progress_handler(self, cmd): |
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"""Process a ProgressCommand.""" |
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raise NotImplementedError(self.progress_handler) |
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def blob_handler(self, cmd): |
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"""Process a BlobCommand.""" |
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raise NotImplementedError(self.blob_handler) |
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def checkpoint_handler(self, cmd): |
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"""Process a CheckpointCommand.""" |
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raise NotImplementedError(self.checkpoint_handler) |
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def commit_handler(self, cmd): |
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"""Process a CommitCommand.""" |
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raise NotImplementedError(self.commit_handler) |
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def reset_handler(self, cmd): |
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"""Process a ResetCommand.""" |
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raise NotImplementedError(self.reset_handler) |
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def tag_handler(self, cmd): |
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"""Process a TagCommand.""" |
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raise NotImplementedError(self.tag_handler) |