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# Copyright (C) 2008 Canonical Ltd
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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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# 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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# 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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"""Serializer object for CHK based inventory storage."""
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class CHKSerializerSubtree(xml6.Serializer_v6):
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"""A CHKInventory based serializer that supports tree references"""
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supported_kinds = set(['file', 'directory', 'symlink', 'tree-reference'])
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revision_format_num = None
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support_altered_by_hack = False
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def _unpack_entry(self, elt):
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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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return xml6.Serializer_v6._unpack_entry(self, elt)
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def __init__(self, node_size, search_key_name):
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self.maximum_size = node_size
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self.search_key_name = search_key_name
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class CHKSerializer(xml5.Serializer_v5):
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"""A CHKInventory based serializer with 'plain' behaviour."""
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revision_format_num = None
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support_altered_by_hack = False
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def __init__(self, node_size, search_key_name):
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self.maximum_size = node_size
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self.search_key_name = search_key_name
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chk_serializer_subtree_parent_id = CHKSerializerSubtree(4096, 'plain')
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chk_serializer_parent_id = CHKSerializer(4096, 'plain')
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chk_serializer_16_parent_id = CHKSerializer(4096, 'hash-16-way')
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chk_serializer_255_parent_id = CHKSerializer(4096, 'hash-255-way')
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chk_serializer_255_bigpage = CHKSerializer(65536, 'hash-255-way')