def write(self):
if self.isloaded:
self.count = len(self.keys)
leafjson = {}
leafjson["version"] = 1
if len(self) > 0:
if self.key_class in [int, dict, list, str, unicode]:
leafjson["keys"] = self.keys
else:
leafjson["keys"] = [key.to_JSON() for key in self.keys]
if self.value_class in [int, dict, list, str, unicode]:
leafjson["values"] = self.values
else:
leafjson["values"] = [value.to_JSON() for value in self.values]
else:
leafjson["keys"] = []
leafjson["values"] = []
s = json.dumps(leafjson, indent=3)
self.hash = sstr(hashlib.md5(s).hexdigest())
f = open(self.filename, 'w')
f.write(s + "\n")
f.close()
self.leaffactory.page_changed(self, None)
def ensure_load(self):
if not(self.isloaded):
if os.path.isfile(self.filename):
leafjson = json.loads(open(self.filename).read())
if leafjson["version"] != 1:
raise IOException("Version of B+ tree page file " + sstr(self.filename) + " is not compatible.")
if self.key_class in [int, dict, list, str, unicode]:
self.keys = leafjson["keys"]
else:
self.keys = [self.key_class.from_JSON(keyjson) for keyjson in leafjson["keys"]]
if self.value_class in [int, dict, list, str, unicode]:
self.values = leafjson["values"]
else:
self.values = [self.value_class.from_JSON(value_json) for value_json in leafjson["values"]]
self.isloaded = True
self.count = len(self.keys)
else:
self.isloaded = True
self.count = 0
def ensure_load(self):
if not(self.isloaded):
if os.path.isfile(self.filename):
with open(self.filename) as f:
leafjson = json.loads(f.read())
if leafjson["version"] != 1:
raise IOException("Version of B+ tree page file " + sstr(self.filename) + " is not compatible.")
if self.key_class in [int, dict, list, str, str]:
self.keys = leafjson["keys"]
else:
self.keys = [self.key_class.from_JSON(keyjson) for keyjson in leafjson["keys"]]
if self.value_class in [int, dict, list, str, str]:
self.values = leafjson["values"]
else:
self.values = [self.value_class.from_JSON(value_json) for value_json in leafjson["values"]]
self.isloaded = True
self.count = len(self.keys)
else:
self.isloaded = True
self.count = 0
def write(self):
if self.isloaded:
self.count = len(self.keys)
leafjson = {}
leafjson["version"] = 1
if len(self) > 0:
if self.key_class in [int, dict, list, str, str]:
leafjson["keys"] = self.keys
else:
leafjson["keys"] = [key.to_JSON() for key in self.keys]
if self.value_class in [int, dict, list, str, str]:
leafjson["values"] = self.values
else:
leafjson["values"] = [value.to_JSON() for value in self.values]
else:
leafjson["keys"] = []
leafjson["values"] = []
s = json.dumps(leafjson, indent=3)
self.hash = sstr(hashlib.md5(s.encode('utf-8')).hexdigest())
with open(self.filename, 'w') as f:
f.write(s + "\n")
self.leaffactory.page_changed(self, None)