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#
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied. See the License for the
# specific language governing permissions and limitations
# under the License.
#
"""
This module provides document parsing and transformation utilities for XML.
"""
from __future__ import absolute_import
import os
import sys
import xml.sax
import types
from xml.sax.handler import ErrorHandler
from xml.sax.xmlreader import InputSource
try:
from io import StringIO
except ImportError:
from cStringIO import StringIO
if sys.version_info[0] == 2:
import types
CLASS_TYPES = (type, types.ClassType)
else:
CLASS_TYPES = (type,)
from . import dom
from . import transforms
from . import parsers
def transform(node, *args):
result = node
for t in args:
if isinstance(t, CLASS_TYPES):
t = t()
result = result.dispatch(t)
return result
class Resolver:
def __init__(self, path):
self.path = path
def resolveEntity(self, publicId, systemId):
for p in self.path:
fname = os.path.join(p, systemId)
if os.path.exists(fname):
source = InputSource(systemId)
source.setByteStream(open(fname))
return source
return InputSource(systemId)
def xml_parse(filename, path=()):
h = parsers.XMLParser()
p = xml.sax.make_parser()
p.setContentHandler(h)
p.setErrorHandler(ErrorHandler())
p.setEntityResolver(Resolver(path))
p.parse(filename)
return h.parser.tree
def sexp(node):
s = transforms.Sexp()
node.dispatch(s)
return s.out
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