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struct_nest_parser.py
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struct_nest_parser.py
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# -*- coding:utf-8 -*-
from lepl import *
# TODO json不是以{}开头
import traceback
from mako.template import Template as tp
def __function__():
stack = traceback.extract_stack()
(filename, line, procname, text) = stack[-2]
return procname
class field_type(object):
def __init__(self):
pass
def is_random_name(self):
return self.is_random
def set_random(self):
self.is_random = True
def set_field_name(self, value):
return self.field_name
def get_field_name(self):
return self.field_name
def get_type(self):
return self.type
def get_value(self):
return self.value
def set_type(self, type):
self.type = type
def set_value(self, value):
self.value = value
def set_name(self, name):
self.name = name
def get_name(self):
return self.name
class list_item_type(field_type):
def __init__(self):
super(list_item_type, self).__init__()
self.type = 'list_item_type'
self.item_type = None
self.item = None
self.field_name = None
self.is_random = False
def __eq__(self, obj):
obj_type = obj.get_type()
if obj_type != self.get_type():
return False
if self.get_item_type() != obj.get_item_type():
return False
return self.get_value() == obj.get_value()
def get_value(self):
return self.item
def set_value(self, value):
self.item = value
def set_item_type(self, type):
self.item_type = type
def get_item_type(self):
return self.item_type
def __str__(self):
return '{type:list_item_type & item_type:%s}' % self.get_item_type()
class list_type(field_type):
def __init__(self):
super(list_type, self).__init__()
self.type = 'list_type'
self.items = None
self.field_name = None
self.is_random = False
self.as_class_object = False
def set_as_class_object(self):
self.as_class_object = True
def is_as_class_object(self):
return self.as_class_object
def __eq__(self, obj):
obj_type = obj.get_type()
if obj_type != self.get_type():
return False
if self.get_item_type() != obj.get_item_type():
return False
return self.get_one_item_value() == obj.get_one_item_value()
def get_value(self):
return self.items
def get_one_item_value(self):
return self.items[0]
def get_item_type(self):
return self.get_one_item_type()
def get_one_item_type(self):
return self.items[0].get_type()
def set_value(self, values):
self.items = values
def __str__(self):
return '[type:list_type & {%s}]' % ','.join(map(lambda x: str(x), self.items))
class map_item_type(field_type):
def __init__(self):
super(map_item_type, self).__init__()
self.type = 'map_item_type'
self.key_type = None
self.value_type = None
self.value = None
self.key = None
self.field_name = None
self.is_random = False
def __eq__(self, obj):
obj_type = obj.get_type()
if obj_type != self.get_type():
return False
if self.get_item_key_type() != obj.get_item_key_type() or self.get_item_value_type() != obj.get_item_value_type():
return False
return self.set_value_value() == obj.set_value_value()
def set_value(self, key, value):
self.key = key
self.value = value
def set_key_value(self, key):
self.key = key
def set_value_value(self, value):
self.value = value
def get_key_value(self):
return self.key
def get_value_value(self):
return self.value
def set_item_key_type(self, key):
self.key_type = key
def set_item_value_type(self, value):
self.value_type = value
def get_item_key_type(self):
return self.key_type
def get_item_value_type(self):
return self.value_type
def get_value(self):
return self.key, self.value
def set_item_type(self, key, value):
self.key_type = key
self.value_type = value
def get_item_type(self):
return self.key_type, self.value_type
def __str__(self):
return '{type:map_item_type & key_type:%s & value_type:%s & key_value:%s}' % (self.key_type, self.value_type, self.key)
class map_type(field_type):
def __init__(self):
super(map_type, self).__init__()
self.type = 'map_type'
self.items = None
self.field_name = None
self.is_random = False
def __eq__(self, obj):
obj_type = obj.get_type()
if obj_type != self.get_type():
return False
if len(self.get_value()) != len(obj.get_value()):
return False
list_self_items = []
list_obj_items = []
for item in self.items:
list_a.append({"item":item, "used":False})
for item in obj.items:
list_b.append({"item":item, "used":False})
list_count = len(list_a)
compare_ok_count = 0
for self_item in list_self_items:
for obj_item in list_obj_items:
if obj_item["used"]:
continue
if self_item["item"] == obj_item["item"]:
self_item["used"] = True
obj_item["used"] = True
compare_ok_count += 1
break
return compare_ok_count == list_count
def get_value(self):
return self.items
def set_value(self, value):
self.items = value
def __str__(self):
return '{%s}' % ','.join(map(lambda x : str(x), self.items))
class string_type(field_type):
def __init__(self):
super(string_type, self).__init__()
self.type = 'string_type'
self.value = None
self.name = 'std::string'
self.field_name = None
self.is_random = False
def __eq__(self, obj):
return self.get_type() == obj.get_type()
def get_name(self):
return self.name
def __str__(self):
return '{type:string & value:%s}' % self.value
class number_type(field_type):
def __init__(self):
super(number_type, self).__init__()
self.type = 'number_type'
self.value = None
self.name = 'int'
self.field_name = None
self.is_random = False
def __eq__(self, obj):
return self.get_type() == obj.get_type()
def get_name(self):
return self.name
def __str__(self):
return '{type:number & value:%s}' % self.value
class json_parser(object):
def __init__(self):
self.parsed_fields = []
def parse_list_item(self, values):
#print __function__(), values
token_count = len(values)
poped_type = None
parsed_type = list_item_type()
item = self.parsed_fields.pop()
parsed_type.set_item_type(item.get_type())
parsed_type.set_value(item)
self.parsed_fields.append(parsed_type)
def parse_map_item(self, values):
#print __function__(), values
value = self.parsed_fields.pop()
key = self.parsed_fields.pop()
parsed_type = map_item_type()
parsed_type.set_item_type(key.get_type(), value.get_type())
parsed_type.set_value(key, value)
self.parsed_fields.append(parsed_type)
def parse_number(self, values):
#print __function__(), values
parsed_type = number_type()
parsed_type.set_value(values[0])
self.parsed_fields.append(parsed_type)
def parse_string(self, values):
#print __function__(), values
parsed_type = string_type()
parsed_type.set_value(values[0])
self.parsed_fields.append(parsed_type)
def parse_list(self, values):
#print __function__(), values
item_count = len(values)
items = []
for i in range(item_count):
items.append(self.parsed_fields.pop())
parsed_type = list_type()
parsed_type.set_value(items)
self.parsed_fields.append(parsed_type)
def parse_map(self, values):
#print __function__(), values
item_count = len(values)
items = []
for i in range(item_count):
items.append(self.parsed_fields.pop())
parsed_type = map_type()
parsed_type.set_value(items)
self.parsed_fields.append(parsed_type)
def fetch_parse_result(self):
return self.parsed_fields.pop()
class json_grammar(object):
def __init__(self):
self.jp = json_parser()
space = ~Star(Literal('\n') | Literal('\t') | Literal(' '))
identifier = Word(Letter() | '_' | Digit())
with Separator(space):
item = Delayed()
number = Real() > self.jp.parse_number
string = ~Literal('"') & identifier & ~Literal('"') > self.jp.parse_string
json_list_value = item
json_list_item = json_list_value > self.jp.parse_list_item
json_list_items = json_list_item[:, Drop(',')]
json_list = ~Literal('[') & json_list_items & ~Literal(']') > self.jp.parse_list
json_map_key_string = ~Literal('"') & identifier & ~Literal('"') > self.jp.parse_string
json_map_key_number = number
json_map_key = json_map_key_string | json_map_key_number
json_map_value = item
json_map_item = json_map_key & ~Literal(':') & json_map_value > self.jp.parse_map_item
json_map_items = json_map_item[:, Drop(',')]
json_map = ~Literal('{') & json_map_items & ~Literal('}') > self.jp.parse_map
base = string | number
item += json_list | json_map | base
self.json = space & item & space & ~Eos()
def parse(self, string):
self.json.parse(string)
return self.jp.fetch_parse_result()
def get_all_class_info(class_info):
todo = []
class_infos = []
class_infos.append({"name":"root_class", "class_info":class_info})
unknown_idx = 0
first = True
while len(class_infos):
obj = class_infos.pop()
class_name = obj["name"]
class_new_info = obj["class_info"]
class_type = class_new_info.get_type()
if class_type == 'map_type':
first = False
todo.append((class_name, class_new_info))
for each_item in class_new_info.get_value():
item_type = each_item.get_type()
obj = {"name":each_item.get_key_value().get_value(), "class_info":each_item.get_value_value()}
class_infos.append(obj)
elif class_type == 'list_type':
if first:
class_new_info.set_name('auto_%d' % unknown_idx)
todo.append((class_name, class_new_info))
first = False
item_type = class_new_info.get_item_type()
if item_type not in ['string_type', 'number_type']:
obj = {"name":class_new_info.get_one_item_value().get_value(), "class_info":class_new_info.get_one_item_value()}
class_infos.append(obj)
elif class_type == 'list_item_type':
first = False
item_type = class_new_info.get_item_type()
if item_type == 'map_type':
map_obj = class_new_info.get_value()
map_obj.set_name('auto_%d' % unknown_idx)
obj = {"name": map_obj.get_name(), "class_info": map_obj}
class_infos.append(obj)
elif item_type == 'list_type':
list_obj = class_new_info.get_value()
list_obj.set_name('auto_%d' % unknown_idx)
obj = {"name": list_obj.get_name(), "class_info": list_obj}
class_infos.append(obj)
list_obj.set_as_class_object()
todo.append((obj["name"], list_obj))
else:
pass
elif class_type == 'map_item_type':
first = False
_, item_type = class_new_info.get_item_type()
key, value = class_new_info.get_value()
if item_type not in ['string_type', 'number_type']:
obj = {"name":class_new_info.get_key_value().get_value(), "class_info":class_new_info.get_value_value()}
class_infos.append(obj)
else:
first = False
pass
return set(todo)
def define_class(classname, classinfo, filename):
t = tp('''
struct ${class_name} {
%if class_info.get_type() == 'map_type':
%for field in class_info.get_value():
<%
item_key_type, item_value_type = field.get_item_type()
item_key, item_value = field.get_value()
%>
%if item_value_type == 'list_type':
std::vector<${field.get_value_value().get_one_item_value().get_value().get_name()}> ${item_key.get_value()};
%elif item_value_type == 'map_type':
${item_key.get_value()} ${item_key.get_value()};
%else:
${field.value.get_name()} ${item_key.get_value()};
%endif
%endfor
%elif class_info.get_type() == 'list_type':
<%
print class_info.items[0]
item_value = class_info.get_one_item_value()
item_name = None
try:
item_name = item_value.get_value().get_name()
except:
item_name = item_value.get_name()
%>
std::vector<${item_name}> ${class_info.get_name()};
%else:
%endif
};
''')
return t.render(class_info=classinfo, class_name=classname, fn=filename)
def define_classes(class_infos):
code = ''
for class_info in class_infos:
code += define_class(class_info[0], class_info[1], 'test')
return code
if __name__ == '__main__':
json = json_grammar()
json_obj = json.parse('{"a":{}, "obj":{"id":"20", "name":"my_name", "list":{"a":100}}}')
all_classes = get_all_class_info(json_obj)
code = define_classes(all_classes)
#print(code)
import json_serializor_generator
test = json_serializor_generator.code_generator()
print test.generate_cpp_file_from_code(code)