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# Copyright (C) 2005-2010 Canonical Ltd
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# -*- coding: UTF-8 -*-
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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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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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"""XML externalization support."""
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# importing this module is fairly slow because it has to load several
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from bzrlib.serializer import Serializer
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from bzrlib.trace import mutter
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from bzrlib.trace import mutter, warning
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# it's in this package in python2.5
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from xml.etree.cElementTree import (ElementTree, SubElement, Element,
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XMLTreeBuilder, fromstring, tostring)
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import xml.etree as elementtree
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# Also import ElementTree module so monkey-patching below always works
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import xml.etree.ElementTree
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from cElementTree import (ElementTree, SubElement, Element,
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XMLTreeBuilder, fromstring, tostring)
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import elementtree.ElementTree
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ParseError = SyntaxError
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from cElementTree import (ElementTree, SubElement, Element,
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XMLTreeBuilder, fromstring, tostring)
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except ImportError:
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mutter('WARNING: using slower ElementTree; consider installing cElementTree'
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" and make sure it's on your PYTHONPATH")
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# this copy is shipped with bzr
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## from warnings import warn
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## warn('using slower ElementTree; consider installing cElementTree')
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from util.elementtree.ElementTree import (ElementTree, SubElement,
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Element, XMLTreeBuilder,
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fromstring, tostring)
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import util.elementtree as elementtree
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from xml.parsers.expat import ExpatError as ParseError
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from bzrlib import errors
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class XMLSerializer(Serializer):
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"""Abstract XML object serialize/deserialize"""
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squashes_xml_invalid_characters = True
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def read_inventory_from_string(self, xml_string, revision_id=None,
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entry_cache=None, return_from_cache=False):
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"""Read xml_string into an inventory object.
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:param xml_string: The xml to read.
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:param revision_id: If not-None, the expected revision id of the
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inventory. Some serialisers use this to set the results' root
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revision. This should be supplied for deserialising all
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from-repository inventories so that xml5 inventories that were
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serialised without a revision identifier can be given the right
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revision id (but not for working tree inventories where users can
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edit the data without triggering checksum errors or anything).
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:param entry_cache: An optional cache of InventoryEntry objects. If
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supplied we will look up entries via (file_id, revision_id) which
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should map to a valid InventoryEntry (File/Directory/etc) object.
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:param return_from_cache: Return entries directly from the cache,
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rather than copying them first. This is only safe if the caller
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promises not to mutate the returned inventory entries, but it can
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make some operations significantly faster.
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return self._unpack_inventory(fromstring(xml_string), revision_id,
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entry_cache=entry_cache,
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return_from_cache=return_from_cache)
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raise errors.UnexpectedInventoryFormat(e)
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def read_inventory(self, f, revision_id=None):
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return self._unpack_inventory(self._read_element(f),
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raise errors.UnexpectedInventoryFormat(e)
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from bzrlib.errors import BzrError
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class Serializer(object):
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"""Abstract object serialize/deserialize"""
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def write_inventory(self, inv, f):
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"""Write inventory to a file"""
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elt = self._pack_inventory(inv)
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self._write_element(elt, f)
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def write_inventory_to_string(self, inv):
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return tostring(self._pack_inventory(inv))
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def read_inventory_from_string(self, xml_string):
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return self._unpack_inventory(fromstring(xml_string))
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def read_inventory(self, f):
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return self._unpack_inventory(self._read_element(f))
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def write_revision(self, rev, f):
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self._write_element(self._pack_revision(rev), f)
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def write_revision_to_string(self, rev):
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return tostring(self._pack_revision(rev)) + '\n'
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return tostring(self._pack_revision(rev), f)
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def read_revision(self, f):
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return self._unpack_revision(self._read_element(f))