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bzrlib/xml7.py

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# Copyright (C) 2006-2010 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

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from bzrlib import (

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    inventory,

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    xml6,

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    )

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class Serializer_v7(xml6.Serializer_v6):

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    """A Serializer that supports tree references"""

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    # this format is used by BzrBranch6

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    supported_kinds = set(['file', 'directory', 'symlink', 'tree-reference'])

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    format_num = '7'

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    def _unpack_entry(self, elt, entry_cache=None, return_from_cache=False):

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        kind = elt.tag

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        if not kind in self.supported_kinds:

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            raise AssertionError('unsupported entry kind %s' % kind)

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        if kind == 'tree-reference':

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            file_id = elt.attrib['file_id']

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            name = elt.attrib['name']

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            parent_id = elt.attrib['parent_id']

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            revision = elt.get('revision')

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            reference_revision = elt.get('reference_revision')

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            return inventory.TreeReference(file_id, name, parent_id, revision,

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                                           reference_revision)

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        else:

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            return xml6.Serializer_v6._unpack_entry(self, elt,

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                entry_cache=entry_cache, return_from_cache=return_from_cache)

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serializer_v7 = Serializer_v7()

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