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IgnoredEnums = ["NodeIdType"]
IgnoredStructs = ["QualifiedName", "NodeId", "ExpandedNodeId", "FilterOperand", "Variant", "DataValue", "ExtensionObject", "XmlElement", "LocalizedText"]
class Primitives1(object):
SByte = 0
Int16 = 0
Int32 = 0
Int64 = 0
Char = 0
Byte = 0
UInt16 = 0
UInt32 = 0
UInt64 = 0
Boolean = 0
Double = 0
Float = 0
class Primitives(Primitives1):
Null = 0
String = 0
Bytes = 0
ByteString = 0
CharArray = 0
DateTime = 0
class CodeGenerator(object):
def __init__(self, model, output):
self.model = model
self.output_path = output
self.indent = " "
self.iidx = 0 # indent index
def run(self):
print("Writting python protocol code to ", self.output_path)
self.output_file = open(self.output_path, "w")
self.make_header()
for enum in self.model.enums:
if enum.name not in IgnoredEnums:
self.generate_enum_code(enum)
for struct in self.model.structs:
if struct.name in IgnoredStructs:
continue
if struct.name.endswith("Node") or struct.name.endswith("NodeId"):
continue
self.generate_struct_code(struct)
self.iidx = 0
self.write("")
self.write("")
for struct in self.model.structs:
if struct.name in IgnoredStructs:
continue
if struct.name.endswith("Node") or struct.name.endswith("NodeId"):
continue
if "ExtensionObject" in struct.parents:
self.write("nid = FourByteNodeId(ObjectIds.{0}_Encoding_DefaultBinary)".format(struct.name))
self.write("extension_object_classes[nid] = {0}".format(struct.name))
self.write("extension_object_ids['{0}'] = nid".format(struct.name))
def write(self, line):
if line:
line = self.indent * self.iidx + line
self.output_file.write(line + "\n")
def make_header(self):
self.write("'''")
self.write("Autogenerate code from xml spec")
self.write("'''")
self.write("")
self.write("from datetime import datetime")
self.write("from enum import IntEnum")
self.write("")
#self.write("from opcua.ua.uaerrors import UaError")
self.write("from opcua.ua.uatypes import *")
self.write("from opcua.ua.object_ids import ObjectIds")
def generate_enum_code(self, enum):
self.write("")
self.write("")
self.write("class {}(IntEnum):".format(enum.name))
self.iidx = 1
self.write("'''")
if enum.doc:
self.write(enum.doc)
self.write("")
for val in enum.values:
self.write(":ivar {}:".format(val.name))
self.write(":vartype {}: {}".format(val.name, val.value))
self.write("'''")
for val in enum.values:
self.write("{} = {}".format(val.name, val.value))
self.iidx = 0
def generate_struct_code(self, obj):
self.write("")
self.write("")
self.iidx = 0
self.write("class {}(FrozenClass):".format(obj.name))
self.iidx += 1
self.write("'''")
if obj.doc:
self.write(obj.doc)
self.write("")
for field in obj.fields:
self.write(":ivar {}:".format(field.name))
self.write(":vartype {}: {}".format(field.name, field.uatype))
self.write("'''")
self.write("")
switch_written = False
for field in obj.fields:
if field.switchfield is not None:
if not switch_written:
self.write("ua_switches = {")
switch_written = True
bit = obj.bits[field.switchfield]
self.write(" '{}': ('{}', {}),".format(field.name, bit.container, bit.idx))
#if field.switchvalue is not None: Not sure we need to handle that one
if switch_written:
self.write(" }")
self.write("ua_types = [")
for field in obj.fields:
prefix = "ListOf" if field.length else ""
uatype = prefix + field.uatype
if uatype == "ListOfChar":
uatype = "String"
self.write(" ('{}', '{}'),".format(field.name, uatype))
self.write(" ]")
self.write("")
self.write("def __init__(self):")
self.iidx += 1
# hack extension object stuff
extobj_hack = False
if "BodyLength" in [f.name for f in obj.fields]:
extobj_hack = True
for field in obj.fields:
if extobj_hack and field.name == "Encoding":
self.write("self.Encoding = 1")
elif field.uatype == obj.name: # help!!! selv referencing class
self.write("self.{} = None".format(field.name))
elif not obj.name in ("ExtensionObject") and field.name == "TypeId": # and ( obj.name.endswith("Request") or obj.name.endswith("Response")):
self.write("self.TypeId = FourByteNodeId(ObjectIds.{}_Encoding_DefaultBinary)".format(obj.name))
else:
self.write("self.{} = {}".format(field.name, "[]" if field.length else self.get_default_value(field)))
self.write("self._freeze = True")
self.iidx = 1
#__str__
self.write("")
self.write("def __str__(self):")
self.iidx += 1
tmp = ["'{name}:' + str(self.{name})".format(name=f.name) for f in obj.fields]
tmp = " + ', ' + \\\n ".join(tmp)
self.write("return '{}(' + {} + ')'".format(obj.name, tmp))
self.iidx -= 1
self.write("")
self.write("__repr__ = __str__")
self.iix = 0
def write_unpack_enum(self, name, enum):
self.write("self.{} = {}(uabin.Primitives.{}.unpack(data))".format(name, enum.name, enum.uatype))
def get_size_from_uatype(self, uatype):
if uatype in ("Sbyte", "Byte", "Char", "Boolean"):
return 1
elif uatype in ("Int16", "UInt16"):
return 2
elif uatype in ("Int32", "UInt32", "Float"):
return 4
elif uatype in ("Int64", "UInt64", "Double"):
return 8
else:
raise Exception("Cannot get size from type {}".format(uatype))
def write_unpack_uatype(self, name, uatype):
if hasattr(Primitives, uatype):
self.write("self.{} = uabin.Primitives.{}.unpack(data)".format(name, uatype))
else:
self.write("self.{} = {}.from_binary(data))".format(name, uatype))
def write_pack_enum(self, listname, name, enum):
self.write("{}.append(uabin.Primitives.{}.pack({}.value))".format(listname, enum.uatype, name))
def write_pack_uatype(self, listname, name, uatype):
if hasattr(Primitives, uatype):
self.write("{}.append(uabin.Primitives.{}.pack({}))".format(listname, uatype, name))
else:
self.write("{}.append({}.to_binary(}))".format(listname, name))
return
def get_default_value(self, field):
if field.switchfield:
return None
if field.uatype in self.model.enum_list:
enum = self.model.get_enum(field.uatype)
return enum.name + "(0)"
if field.uatype in ("String"):
return None
elif field.uatype in ("ByteString", "CharArray", "Char"):
return None
elif field.uatype in ("Boolean"):
return "True"
elif field.uatype in ("DateTime"):
return "datetime.utcnow()"
elif field.uatype in ("Int16", "Int32", "Int64", "UInt16", "UInt32", "UInt64", "Double", "Float", "Byte"):
return 0
elif field.uatype in ("ExtensionObject"):
return "ExtensionObject()"
else:
return field.uatype + "()"
if __name__ == "__main__":
import generate_model as gm
xmlpath = "Opc.Ua.Types.bsd"
protocolpath = "../opcua/ua/uaprotocol_auto.py"
p = gm.Parser(xmlpath)
model = p.parse()
gm.add_basetype_members(model)
gm.add_encoding_field(model)
gm.remove_duplicates(model)
gm.remove_vector_length(model)
gm.split_requests(model)
gm.fix_names(model)
gm.remove_duplicate_types(model)
c = CodeGenerator(model, protocolpath)
c.run()
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