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# Copyright (C) 2008 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
"""Serializer object for CHK based inventory storage."""
from cStringIO import (
StringIO,
)
from bzrlib import (
bencode,
cache_utf8,
inventory,
osutils,
revision as _mod_revision,
xml5,
xml6,
)
class BEncodeRevisionSerializer1(object):
"""Simple revision serializer based around bencode.
"""
def write_revision_to_string(self, rev):
encode_utf8 = cache_utf8.encode
ret = {
"revision-id": rev.revision_id,
"timestamp": "%.3f" % rev.timestamp,
"parent-ids": rev.parent_ids,
"inventory-sha1": rev.inventory_sha1,
"committer": encode_utf8(rev.committer),
"message": encode_utf8(rev.message),
}
revprops = {}
for key, value in rev.properties.iteritems():
revprops[key] = encode_utf8(value)
ret["properties"] = revprops
if rev.timezone is not None:
ret["timezone"] = rev.timezone
return bencode.bencode(ret)
def write_revision(self, rev, f):
f.write(self.write_revision_to_string(rev))
def read_revision_from_string(self, text):
decode_utf8 = cache_utf8.decode
ret = bencode.bdecode(text)
rev = _mod_revision.Revision(
committer=decode_utf8(ret["committer"]),
revision_id=ret["revision-id"],
parent_ids=ret["parent-ids"],
inventory_sha1=ret["inventory-sha1"],
timestamp=float(ret["timestamp"]),
message=decode_utf8(ret["message"]),
properties={})
if "timezone" in ret:
rev.timezone = ret["timezone"]
else:
rev.timezone = None
for key, value in ret["properties"].iteritems():
rev.properties[key] = decode_utf8(value)
return rev
def read_revision(self, f):
return self.read_revision_from_string(f.read())
class CHKSerializerSubtree(BEncodeRevisionSerializer1, xml6.Serializer_v6):
"""A CHKInventory based serializer that supports tree references"""
supported_kinds = set(['file', 'directory', 'symlink', 'tree-reference'])
format_num = '9'
revision_format_num = None
support_altered_by_hack = False
def _unpack_entry(self, elt):
kind = elt.tag
if not kind in self.supported_kinds:
raise AssertionError('unsupported entry kind %s' % kind)
if kind == 'tree-reference':
file_id = elt.attrib['file_id']
name = elt.attrib['name']
parent_id = elt.attrib['parent_id']
revision = elt.get('revision')
reference_revision = elt.get('reference_revision')
return inventory.TreeReference(file_id, name, parent_id, revision,
reference_revision)
else:
return xml6.Serializer_v6._unpack_entry(self, elt)
def __init__(self, node_size, search_key_name):
self.maximum_size = node_size
self.search_key_name = search_key_name
class CHKSerializer(xml5.Serializer_v5):
"""A CHKInventory based serializer with 'plain' behaviour."""
format_num = '9'
revision_format_num = None
support_altered_by_hack = False
def __init__(self, node_size, search_key_name):
self.maximum_size = node_size
self.search_key_name = search_key_name
chk_serializer_255_bigpage = CHKSerializer(65536, 'hash-255-way')
class CHKBEncodeSerializer(BEncodeRevisionSerializer1, CHKSerializer):
"""A CHKInventory and BEncode based serializer with 'plain' behaviour."""
format_num = '10'
chk_bencode_serializer = CHKBEncodeSerializer(65536, 'hash-255-way')
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