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jsonxsd2cpp.py
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jsonxsd2cpp.py
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#!/usr/bin/python
# The MIT License (MIT)
#
# Copyright (c) 2013 Yuanyang Wu
#
# Permission is hereby granted, free of charge, to any person obtaining a
# copy of this software and associated documentation files (the "Software"),
# to deal in the Software without restriction, including without limitation
# the rights to use, copy, modify, merge, publish, distribute, sublicense,
# and/or sell copies of the Software, and to permit persons to whom the
# Software is furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included
# in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
# OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
# ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
# OTHER DEALINGS IN THE SOFTWARE.
import string
import os.path
import types
import xml.dom.minidom
from jsoncpphandler import CppHeaderHandler, CppBodyBuilder, CppTest, CppFormat
from jsondetailcpp import JSONDetailCppClass
def debug_xml_node(node, indent):
print " " * indent + node.localName + " " + \
", ".join([str(item[0]) + "=" + str(item[1]) for item in node.attributes.items()])
for n in node.childNodes:
if n.nodeType == n.ELEMENT_NODE:
debug_xml_node(n, indent + 1)
class XmlUtil:
def get_node_attribute_value(xml_node, attr_name, default_value = None):
if xml_node.attributes.has_key(attr_name):
return str(xml_node.attributes.getNamedItem(attr_name).value)
else:
return default_value
def get_node_attribute_dic(xml_node):
ret = {}
for item in xml_node.attributes.items():
ret[str(item[0])] = str(item[1])
return ret
def get_child_element_node(xml_node, element_name):
for n in xml_node.childNodes:
if n.nodeType == n.ELEMENT_NODE:
if str(n.localName) == element_name:
return n
return None
get_node_attribute_value = staticmethod(get_node_attribute_value)
get_node_attribute_dic = staticmethod(get_node_attribute_dic)
get_child_element_node = staticmethod(get_child_element_node)
class JSONXSDConstant:
basic_arrays = {
"string": "detail::StringArray",
"int": "detail::IntArray",
"long": "detail::Int64Array",
"boolean": "detail::BooleanArray",
"double": "detail::DoubleArray"
}
def is_basic_type(typename):
return JSONXSDConstant.basic_arrays.has_key(typename)
def get_cpp_class_name(typename, is_multiple):
arrayclass = JSONXSDConstant.basic_arrays.get(typename)
if arrayclass == None:
classname = typename
if is_multiple:
classname = classname + "Array"
return CppFormat.classname(classname)
else:
if is_multiple:
# array basic type
return arrayclass
else:
# single basic type
return typename
return None
is_basic_type = staticmethod(is_basic_type)
get_cpp_class_name = staticmethod(get_cpp_class_name)
class JSONXSDFile:
def __init__(self, filepath):
self.filepath = filepath
self.elements = {}
self.simpletypes = {}
self.complextypes = {}
self.parse_file()
def get_element_definition(self, element_name):
assert self.elements.has_key(element_name), ("element must be defined")
element = self.elements[element_name]
return element
def is_basic_type(self, typename):
return self.get_basic_type(typename) != None
def get_basic_type(self, typename):
if JSONXSDConstant.basic_arrays.has_key(typename):
return typename
def_node = self.simpletypes.get(typename)
if def_node != None:
self.parse_simpletype_full(def_node)
return self.get_basic_type(def_node["base_type_name"])
return None
def is_single_basic_type(self, element_name):
assert self.elements.has_key(element_name), ("element must be defined")
element = self.elements[element_name]
return (not element["is_multiple"]) and self.is_basic_type(element["type_name"])
def is_array_basic_type(self, element_name):
assert self.elements.has_key(element_name), ("element must be defined")
element = self.elements[element_name]
return element["is_multiple"] and self.is_basic_type(element["type_name"])
def get_element_class_and_deps(self, element_name):
element = self.elements[element_name]
return self.get_type_deps_simple(element["type_name"], element["is_multiple"])
def get_type_deps_simple(self, typename, is_multiple):
basic_typename = self.get_basic_type(typename)
if basic_typename != None:
if is_multiple:
# basic array
return (basic_typename, True), set([(basic_typename, True)])
else:
# basic single
return (basic_typename, False), set()
else:
# complexType
if is_multiple:
return (typename, True), set([(typename, False), (typename, True)])
else:
return (typename, False), set([(typename, False)])
def get_type_deps(self, typename):
deps = set()
if self.simpletypes.has_key(typename):
return deps
def_node = self.complextypes[typename]
self.parse_complextype_full(def_node)
if def_node.has_key("sequence_elements"):
for n in def_node["sequence_elements"]:
if n.has_key("ref_name"):
cur_class, cur_deps = self.get_element_class_and_deps(n["ref_name"])
else:
cur_class, cur_deps = self.get_type_deps_simple(n["type_name"], n["is_multiple"])
deps = deps.union(cur_deps)
if def_node.has_key("base_type_name"):
cur_class, cur_deps = self.get_type_deps_simple(def_node["base_type_name"], False)
deps = deps.union(cur_deps)
return deps
def parse_file(self):
dom = xml.dom.minidom.parse(self.filepath)
self.parse_schema_node(dom.childNodes[0])
def parse_schema_node(self, xml_node):
for n in xml_node.childNodes:
if n.nodeType == n.ELEMENT_NODE:
if str(n.localName) == "element":
def_node = self.parse_element_node(n, True)
self.elements[def_node["name"]] = def_node
if str(n.localName) == "simpleType":
def_node = self.parse_simpletype_node(n)
self.simpletypes[def_node["name"]] = def_node
if str(n.localName) == "complexType":
def_node = self.parse_complextype_node(n)
self.complextypes[def_node["name"]] = def_node
def parse_element_node(self, xml_node, require_name_attr):
def_node = {}
def_node["xml_node"] = xml_node
attrs = XmlUtil.get_node_attribute_dic(xml_node)
if attrs.has_key("ref"):
def_node["ref_name"] = attrs["ref"]
assert not require_name_attr, ("top level <element> most NOT have attribute \"ref\"")
else:
if attrs.has_key("name"):
def_node["name"] = attrs["name"]
elif require_name_attr:
assert False, ("""<element> must has attribute "name".""")
assert attrs.has_key("type"), ("<element> \"" + def_node.get("name", "(None)") + "\" must has attribute \"type\"")
def_node["type_name"] = attrs["type"].split(":")[-1]
min_occurs = attrs.get("minOccurs", "1")
max_occurs = attrs.get("maxOccurs", "1")
def_node["is_multiple"] = (max_occurs != "1") or ((min_occurs != "0") and (min_occurs != "1"))
return def_node
def parse_simpletype_node(self, xml_node):
def_node = {}
def_node["xml_node"] = xml_node
def_node["name"] = XmlUtil.get_node_attribute_value(xml_node, "name")
assert ["name"] != None, ("""<simpleType> must has attribute "name".""")
return def_node
def parse_simpletype_full(self, def_node):
xml_node = def_node["xml_node"]
restriction_node = XmlUtil.get_child_element_node(xml_node, "restriction")
assert restriction_node != None, ("simpleType \"" + def_node.get("name", "(None)") + "\" must has \"restriction\" child node")
base_type_name = XmlUtil.get_node_attribute_value(restriction_node, "base")
assert base_type_name != None, ("simpleType \"" + def_node.get("name", "(None)") + "\" must have attribute \"base\" in \"restriction\" node")
def_node["base_type_name"] = base_type_name.split(":")[-1]
def parse_complextype_node(self, xml_node):
def_node = {}
def_node["xml_node"] = xml_node
def_node["name"] = XmlUtil.get_node_attribute_value(xml_node, "name")
assert ["name"] != None, ("""<simpleType> must has attribute "name".""")
return def_node
def parse_complextype_full(self, def_node):
xml_node = def_node["xml_node"]
node = XmlUtil.get_child_element_node(xml_node, "sequence")
if node != None:
sequence_elements = []
for n in node.childNodes:
if n.nodeType == n.ELEMENT_NODE:
sequence_elements.append(self.parse_element_node(n, False))
def_node["sequence_elements"] = sequence_elements
return None
node = XmlUtil.get_child_element_node(xml_node, "complexContent")
if node != None:
extension_xml_node = XmlUtil.get_child_element_node(node, "extension");
if extension_xml_node != None:
base_type_name = XmlUtil.get_node_attribute_value(extension_xml_node, "base")
assert base_type_name != None, ("complexType \"" + def_node["name"] + """\"'s "complexContent > extension" must have attribute "base" """)
def_node["base_type_name"] = base_type_name.split(":")[-1]
sequence_xml_node = XmlUtil.get_child_element_node(extension_xml_node, "sequence")
if sequence_xml_node != None:
sequence_elements = []
for n in sequence_xml_node.childNodes:
if n.nodeType == n.ELEMENT_NODE:
sequence_elements.append(self.parse_element_node(n, False))
def_node["sequence_elements"] = sequence_elements
return None
restriction_xml_node = XmlUtil.get_child_element_node(node, "restriction");
if restriction_xml_node != None:
base_type_name = XmlUtil.get_node_attribute_value(restriction_xml_node, "base")
assert base_type_name != None, ("complexType \"" + def_node["name"] + """\"'s "complexContent > restriction" must have attribute "base" """)
def_node["base_type_name"] = base_type_name.split(":")[-1]
return None
assert False, ("complexType \"" + def_node["name"] + """\"'s child element "complexContent" must have "extension/restriction" child element""")
return None
assert False, ("complexType \"" + def_node["name"] + "\" must have \"sequence/complexContent\" child element")
class JSONXSDWalker:
def __init__(self, json_xsd_file):
self.schema = json_xsd_file
self.basic_types = ["string", "int", "long", "boolean", "double"]
self.json_handlers = []
def walk(self, typename, is_multiple):
assert not JSONXSDConstant.is_basic_type(typename), ("only complexType should be passed")
if is_multiple:
self.walk_array_complex_type(typename)
else:
# single complex type
def_node = self.schema.complextypes[typename]
self.walk_single_complex_sequence(typename)
def walk_single_complex_sequence(self, complex_type_name):
parent_names = []
name = JSONXSDConstant.get_cpp_class_name(complex_type_name, False)
def_node = self.schema.complextypes[complex_type_name]
base_name = None
if def_node.has_key("base_type_name"):
base_name = JSONXSDConstant.get_cpp_class_name(def_node["base_type_name"], False)
sequence_elements = []
if def_node.has_key("sequence_elements"):
sequence_elements = def_node["sequence_elements"]
for handler in self.json_handlers:
handler.handle_object_start(parent_names, name, None, base_name)
for n in sequence_elements:
if n.has_key("ref_name"):
cur_class, cur_deps = self.schema.get_element_class_and_deps(n["ref_name"])
ref_def_node = self.schema.get_element_definition(n["ref_name"])
cur_name = ref_def_node["name"]
else:
cur_class, cur_deps = self.schema.get_type_deps_simple(n["type_name"], n["is_multiple"])
cur_name = n["name"]
typename, is_multiple = cur_class
child_parent_names = parent_names[:]
child_parent_names.append(name)
child_name = cur_name
child_type_name = JSONXSDConstant.get_cpp_class_name(typename, is_multiple)
for handler in self.json_handlers:
if is_multiple:
# array
handler.handle_array_start(child_parent_names, child_name, child_type_name)
handler.handle_array_end(child_parent_names, child_name, child_type_name)
else:
if JSONXSDConstant.is_basic_type(typename):
# single basic type
if child_type_name == "boolean":
handler.handle_boolean(child_parent_names, child_name)
elif child_type_name == "double":
handler.handle_float(child_parent_names, child_name)
elif child_type_name == "int":
handler.handle_int(child_parent_names, child_name)
elif child_type_name == "long":
handler.handle_int64(child_parent_names, child_name)
elif child_type_name == "string":
handler.handle_string(child_parent_names, child_name)
else:
assert False, ("Unsupported type: " + child_type_name)
else:
# encode/decode array and object in same way
handler.handle_object_start(child_parent_names, child_name, typename)
handler.handle_object_end(child_parent_names, child_name, typename)
for handler in self.json_handlers:
handler.handle_object_end(parent_names, name)
def walk_array_complex_type(self, complex_type_name):
parent_names = []
name = JSONXSDConstant.get_cpp_class_name(complex_type_name, True)
for handler in self.json_handlers:
handler.handle_array_start(parent_names, name, complex_type_name)
child_parent_names = parent_names[:]
child_parent_names.append(name)
# array element has no name
# use "None" to indicate parent is array
child_name = None
for handler in self.json_handlers:
handler.handle_object_start(child_parent_names, child_name, complex_type_name)
handler.handle_object_end(child_parent_names, child_name, complex_type_name)
for handler in self.json_handlers:
handler.handle_array_end(parent_names, name, complex_type_name)
def parse_options():
import optparse
usage_msg = """usage: %prog [options] XSDFile"""
parser = optparse.OptionParser(usage=usage_msg)
parser.add_option("--element", dest="element_name", default="",
help="required. Generate code against specified <element> name in XSD file")
parser.add_option("--dstdir", dest="dstdir", default=".",
help="directory to save the generated code files, default is current directory")
parser.add_option("--namespace", dest="namespace", default="",
help="""C++ namespace seperated with "::", for example, "com::company". Default is no namespace""")
parser.add_option("--stringtype", dest="stringtype", default="std::string",
help="""C++ string type, std::string or std::wstring, default is std::string""")
parser.add_option("--gentest", action="store_true", dest="gentest", default=False,
help="""generate test code "main.cpp", default is false""")
options, reminder = parser.parse_args()
valid = True
if len(reminder) != 1:
valid = False
if valid and options.element_name == "":
valid = False
if valid and (len(options.namespace) > 0):
l = options.namespace.split("::")
if l.count("") > 0:
valid = False
if len([x for x in l if x.count(":") > 0]) > 0:
valid = False
if valid and (options.stringtype not in ["std::string", "std::wstring"]):
valid = False
if not valid:
parser.print_help()
exit(1)
options.jsonxsdfile = reminder[0]
return options
if __name__ == "__main__":
options = parse_options()
dom = xml.dom.minidom.parse(options.jsonxsdfile)
#debug_xml_node(dom.childNodes[0], 0)
schema = JSONXSDFile(options.jsonxsdfile)
#import pprint
#pprint.pprint(schema.elements)
#pprint.pprint(schema.simpletypes)
#pprint.pprint(schema.complextypes)
#jsondef = schema.get_element_definition(options.element_name)
#pprint.pprint(jsondef)
#exit(0)
cur_class, cur_deps = schema.get_element_class_and_deps(options.element_name)
#print "cur_class: ", cur_class
#print "cur_deps", cur_deps
typename, is_multiple = cur_class
new_deps = cur_deps
dep_types = set()
array_types = set()
while len(new_deps) > 0:
typename, is_multiple = new_deps.pop()
if typename in JSONXSDConstant.basic_arrays:
if is_multiple:
array_types.add( (typename, is_multiple) )
elif (typename, is_multiple) in dep_types:
pass # ignore already parsed type
else:
cur_deps = schema.get_type_deps(typename)
new_deps = new_deps.union(cur_deps)
dep_types.add( (typename, is_multiple) )
#print "dep_types: ", dep_types
#print "array_types: ", array_types
typename, is_multiple = cur_class
if JSONXSDConstant.is_basic_type(typename) and not is_multiple:
#single basic/simple type
exit(0)
classname = JSONXSDConstant.get_cpp_class_name(typename, is_multiple)
if options.gentest:
cpptest = CppTest(classname, options.namespace, options.stringtype)
cpptest.savefile(os.path.join(options.dstdir, cpptest.filename))
for typename, is_multiple in array_types:
classname = JSONXSDConstant.get_cpp_class_name(typename, is_multiple)
detailCpp = JSONDetailCppClass()
detailCpp.save_to_dir(classname, options.dstdir, options.namespace, options.stringtype)
for typename, is_multiple in dep_types:
walker = JSONXSDWalker(schema)
cppheader = CppHeaderHandler(options.namespace, options.stringtype)
walker.json_handlers.append(cppheader)
cppbodybuilder = CppBodyBuilder(options.namespace, options.stringtype)
walker.json_handlers.extend(cppbodybuilder.handlers)
#print "walking " + typename + ", " + str(is_multiple)
walker.walk(typename, is_multiple)
cppheader.save_to_dir(options.dstdir)
cppbodybuilder.save_to_dir(options.dstdir)