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# Copyright (C) 2005, 2006, 2009 Canonical Ltd
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
"""Inventory/revision serialization."""
from bzrlib import registry
class Serializer(object):
"""Inventory and revision serialization/deserialization."""
def write_inventory(self, inv, f):
"""Write inventory to a file"""
raise NotImplementedError(self.write_inventory)
def write_inventory_to_string(self, inv):
raise NotImplementedError(self.write_inventory_to_string)
def read_inventory_from_string(self, string, revision_id=None,
entry_cache=None):
"""Read string into an inventory object.
:param string: The serialized inventory to read.
:param revision_id: If not-None, the expected revision id of the
inventory. Some serialisers use this to set the results' root
revision. This should be supplied for deserialising all
from-repository inventories so that xml5 inventories that were
serialised without a revision identifier can be given the right
revision id (but not for working tree inventories where users can
edit the data without triggering checksum errors or anything).
:param entry_cache: An optional cache of InventoryEntry objects. If
supplied we will look up entries via (file_id, revision_id) which
should map to a valid InventoryEntry (File/Directory/etc) object.
"""
raise NotImplementedError(self.read_inventory_from_string)
def read_inventory(self, f, revision_id=None):
raise NotImplementedError(self.read_inventory)
def write_revision(self, rev, f):
raise NotImplementedError(self.write_revision)
def write_revision_to_string(self, rev):
raise NotImplementedError(self.write_revision_to_string)
def read_revision(self, f):
raise NotImplementedError(self.read_revision)
def read_revision_from_string(self, xml_string):
raise NotImplementedError(self.read_revision_from_string)
class SerializerRegistry(registry.Registry):
"""Registry for serializer objects"""
format_registry = SerializerRegistry()
format_registry.register_lazy('4', 'bzrlib.xml4', 'serializer_v4')
format_registry.register_lazy('5', 'bzrlib.xml5', 'serializer_v5')
format_registry.register_lazy('6', 'bzrlib.xml6', 'serializer_v6')
format_registry.register_lazy('7', 'bzrlib.xml7', 'serializer_v7')
format_registry.register_lazy('8', 'bzrlib.xml8', 'serializer_v8')
format_registry.register_lazy('9', 'bzrlib.chk_serializer',
'chk_serializer_255_bigpage')
format_registry.register_lazy('10', 'bzrlib.chk_serializer',
'chk_bencode_serializer')
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