1
# Copyright (C) 2005, 2006, 2009 Canonical Ltd
3
# This program is free software; you can redistribute it and/or modify
4
# it under the terms of the GNU General Public License as published by
5
# the Free Software Foundation; either version 2 of the License, or
6
# (at your option) any later version.
8
# This program is distributed in the hope that it will be useful,
9
# but WITHOUT ANY WARRANTY; without even the implied warranty of
10
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11
# GNU General Public License for more details.
13
# You should have received a copy of the GNU General Public License
14
# along with this program; if not, write to the Free Software
15
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
18
"""Inventory/revision serialization."""
21
from bzrlib import registry
24
class Serializer(object):
25
"""Inventory and revision serialization/deserialization."""
27
def write_inventory(self, inv, f):
28
"""Write inventory to a file"""
29
raise NotImplementedError(self.write_inventory)
31
def write_inventory_to_string(self, inv):
32
raise NotImplementedError(self.write_inventory_to_string)
34
def read_inventory_from_string(self, string, revision_id=None,
36
"""Read string into an inventory object.
38
:param string: The serialized inventory to read.
39
:param revision_id: If not-None, the expected revision id of the
40
inventory. Some serialisers use this to set the results' root
41
revision. This should be supplied for deserialising all
42
from-repository inventories so that xml5 inventories that were
43
serialised without a revision identifier can be given the right
44
revision id (but not for working tree inventories where users can
45
edit the data without triggering checksum errors or anything).
46
:param entry_cache: An optional cache of InventoryEntry objects. If
47
supplied we will look up entries via (file_id, revision_id) which
48
should map to a valid InventoryEntry (File/Directory/etc) object.
50
raise NotImplementedError(self.read_inventory_from_string)
52
def read_inventory(self, f, revision_id=None):
53
raise NotImplementedError(self.read_inventory)
55
def write_revision(self, rev, f):
56
raise NotImplementedError(self.write_revision)
58
def write_revision_to_string(self, rev):
59
raise NotImplementedError(self.write_revision_to_string)
61
def read_revision(self, f):
62
raise NotImplementedError(self.read_revision)
64
def read_revision_from_string(self, xml_string):
65
raise NotImplementedError(self.read_revision_from_string)
68
class SerializerRegistry(registry.Registry):
69
"""Registry for serializer objects"""
72
format_registry = SerializerRegistry()
73
format_registry.register_lazy('4', 'bzrlib.xml4', 'serializer_v4')
74
format_registry.register_lazy('5', 'bzrlib.xml5', 'serializer_v5')
75
format_registry.register_lazy('6', 'bzrlib.xml6', 'serializer_v6')
76
format_registry.register_lazy('7', 'bzrlib.xml7', 'serializer_v7')
77
format_registry.register_lazy('8', 'bzrlib.xml8', 'serializer_v8')