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#! /usr/bin/env python
# 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
"""XML externalization support."""
# "XML is like violence: if it doesn't solve your problem, you aren't
# using enough of it." -- various
# importing this module is fairly slow because it has to load several
# ElementTree bits
from bzrlib.trace import mutter, warning
try:
from cElementTree import (ElementTree, SubElement, Element,
XMLTreeBuilder, fromstring, tostring)
except ImportError:
from warnings import warn
warn('using slower ElementTree; consider installing cElementTree')
from util.elementtree.ElementTree import (ElementTree, SubElement,
Element, XMLTreeBuilder,
fromstring, tostring)
from bzrlib.inventory import ROOT_ID, Inventory, InventoryEntry
from bzrlib.revision import Revision, RevisionReference
from bzrlib.errors import BzrError
class Serializer(object):
"""Abstract object serialize/deserialize"""
def write_inventory(self, inv, f):
"""Write inventory to a file"""
elt = self._pack_inventory(inv)
self._write_element(elt, f)
def write_inventory_to_string(self, inv):
return tostring(self._pack_inventory(inv))
def read_inventory_from_string(self, xml_string):
return self._unpack_inventory(fromstring(xml_string))
def read_inventory(self, f):
return self._unpack_inventory(self._read_element(f))
def write_revision(self, rev, f):
self._write_element(self._pack_revision(rev), f)
def write_revision_to_string(self, rev):
return tostring(self._pack_revision(rev), f)
def read_revision(self, f):
return self._unpack_revision(self._read_element(f))
def read_revision_from_string(self, xml_string):
return self._unpack_revision(fromstring(xml_string))
def _write_element(self, elt, f):
ElementTree(elt).write(f, 'utf-8')
f.write('\n')
def _read_element(self, f):
return ElementTree().parse(f)
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