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#!/usr/bin/env python
# -*- coding: utf-8 -*-
# Eclipse SUMO, Simulation of Urban MObility; see https://eclipse.dev/sumo
# Copyright (C) 2014-2023 German Aerospace Center (DLR) and others.
# This program and the accompanying materials are made available under the
# terms of the Eclipse Public License 2.0 which is available at
# https://www.eclipse.org/legal/epl-2.0/
# This Source Code may also be made available under the following Secondary
# Licenses when the conditions for such availability set forth in the Eclipse
# Public License 2.0 are satisfied: GNU General Public License, version 2
# or later which is available at
# https://www.gnu.org/licenses/old-licenses/gpl-2.0-standalone.html
# SPDX-License-Identifier: EPL-2.0 OR GPL-2.0-or-later
# @file protobuf2xml.py
# @author Michael Behrisch
# @author Laura Bieker
# @author Jakob Erdmann
# @date 2014-01-23
from __future__ import print_function
from __future__ import absolute_import
import os
import sys
import struct
import contextlib
import xml2csv
import xml2protobuf
import google.protobuf.descriptor # we need to do this late because the xml2protobuf import modifies sys.path
if 'SUMO_HOME' in os.environ:
tools = os.path.join(os.environ['SUMO_HOME'], 'tools')
sys.path.append(tools)
else:
sys.exit("please declare environment variable 'SUMO_HOME'")
import sumolib # noqa
def get_options():
optParser = sumolib.options.ArgumentParser(description="Convert a protocol buffer to an XML file.")
optParser.add_argument("source", category="input", type=optParser.data_file, help="the input protobuf file")
optParser.add_argument("-p", "--protodir", category="input", default=".", help="where to put and read .proto files")
optParser.add_argument("-x", "--xsd", category="processing", required=True, help="xsd schema to use")
optParser.add_argument("-o", "--output", category="output",
type=optParser.data_file, help="name for generic output file")
options = optParser.parse_args()
if not options.output:
options.output = os.path.splitext(options.source)[0] + ".xml"
return options
def read_n(inputf, n):
""" Read exactly n bytes from the input.
Raise RuntimeError if the stream ended before
n bytes were read.
"""
buf = b''
while n > 0:
data = inputf.read(n)
if data == '':
raise RuntimeError('unexpected connection close')
buf += data
n -= len(data)
return buf
def msg2xml(desc, cont, out, depth=1):
out.write(u">\n%s<%s" % (depth * ' ', desc.name))
haveChildren = False
# print(depth, cont)
for attr, value in cont.ListFields():
if attr.type == google.protobuf.descriptor.FieldDescriptor.TYPE_MESSAGE:
if attr.label == google.protobuf.descriptor.FieldDescriptor.LABEL_REPEATED:
haveChildren = True
for item in value:
msg2xml(attr, item, out, depth + 1)
else:
if attr.type == google.protobuf.descriptor.FieldDescriptor.TYPE_ENUM:
value = attr.enum_type.values_by_number[value].name
if value[0] == "_" and value[1].isdigit():
value = value[1:]
out.write(u' %s="%s"' % (attr.name, value))
if haveChildren:
out.write(u">\n%s</%s" % (depth * ' ', desc.name))
else:
out.write(u"/")
def writeXml(root, module, options):
with contextlib.closing(xml2csv.getOutStream(options.output)) as outputf:
outputf.write(u'<?xml version="1.0" encoding="UTF-8"?>\n\n<%s' % root)
if options.source.isdigit():
inp = xml2csv.getSocketStream(int(options.source))
else:
inp = open(options.source, 'rb')
with contextlib.closing(inp) as inputf:
first = True
while True:
length = struct.unpack('>L', read_n(inputf, 4))[0]
if length == 0:
break
obj = vars(module)[root.capitalize()]()
obj.ParseFromString(read_n(inputf, length))
for attr, value in obj.ListFields():
if attr.type == google.protobuf.descriptor.FieldDescriptor.TYPE_MESSAGE:
if attr.label == google.protobuf.descriptor.FieldDescriptor.LABEL_REPEATED:
for item in value:
msg2xml(attr, item, outputf)
elif first:
outputf.write(u' %s="%s"' % (attr.name, value))
first = False
outputf.write(u">\n</%s>\n" % root)
def main():
options = get_options()
# get attributes
attrFinder = xml2csv.AttrFinder(options.xsd, options.source, False)
base = os.path.basename(options.xsd).split('.')[0]
# generate proto format description
module = xml2protobuf.generateProto(attrFinder.tagAttrs, attrFinder.depthTags,
attrFinder.xsdStruc._namedEnumerations, options.protodir, base)
writeXml(attrFinder.xsdStruc.root.name, module, options)
if __name__ == "__main__":
main()
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