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# -*- coding: UTF-8 -*-
# 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:
mutter('WARNING: using slower ElementTree; consider installing cElementTree'
" and make sure it's on your PYTHONPATH")
from util.elementtree.ElementTree import (ElementTree, SubElement,
Element, XMLTreeBuilder,
fromstring, tostring)
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)) + '\n'
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)) + '\n'
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)
# performance tuning for elementree's serialiser. THis should be
# sent upstream - RBC 20060523.
# the functions here are patched into elementree at runtime.
import elementtree.ElementTree
import re
escape_re = re.compile("[&'\"<>]")
escape_map = {
"&":'&',
"'":"'", # FIXME: overkill
"\"":""",
"<":"<",
">":">",
}
def _escape_replace(match, map=escape_map):
return map[match.group()]
def _escape_attrib(text, encoding=None, replace=None):
# escape attribute value
try:
if encoding:
try:
text = elementtree.ElementTree._encode(text, encoding)
except UnicodeError:
return elementtree.ElementTree._encode_entity(text)
if replace is None:
return escape_re.sub(_escape_replace, text)
else:
text = replace(text, "&", "&")
text = replace(text, "'", "'") # FIXME: overkill
text = replace(text, "\"", """)
text = replace(text, "<", "<")
text = replace(text, ">", ">")
return text
except (TypeError, AttributeError):
elementtree.ElementTree._raise_serialization_error(text)
elementtree.ElementTree._escape_attrib = _escape_attrib
escape_cdata_re = re.compile("[&<>]")
escape_cdata_map = {
"&":'&',
"<":"<",
">":">",
}
def _escape_cdata_replace(match, map=escape_cdata_map):
return map[match.group()]
def _escape_cdata(text, encoding=None, replace=None):
# escape character data
try:
if encoding:
try:
text = elementtree.ElementTree._encode(text, encoding)
except UnicodeError:
return elementtree.ElementTree._encode_entity(text)
if replace is None:
return escape_cdata_re.sub(_escape_cdata_replace, text)
else:
text = replace(text, "&", "&")
text = replace(text, "<", "<")
text = replace(text, ">", ">")
return text
except (TypeError, AttributeError):
elementtree.ElementTree._raise_serialization_error(text)
elementtree.ElementTree._escape_cdata = _escape_cdata
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