Changes between Initial Version and Version 1 of pyson

Timestamp:

04/21/21 16:28:01 (4 years ago)

Author:

wouter

Comment:

--

pyson

@@ +1 @@
+== Packson
+
+Packson is a json (de)serializer for python objects.
+It uses annotations in the style of jackson.
+
+
+The basic version determines the types for (de)serialization from the __init__ function in the involved classes. Polymorphism is supported, so derived classes can (de)serialized from a superclass.
+
+A complex example showing many things at once (I did not have time to write out many simpler examples)
+
+{{{
+from jackson.ObjectMapper import ObjectMapper
+from jackson.JsonSubTypes import JsonSubTypes
+from jackson.JsonTypeInfo import JsonTypeInfo
+from jackson.JsonTypeInfo import Id,As
+from typing import Dict,List,Set
+import json
+
+class Props:
+    '''
+    compound class with properties, used for testing 
+    '''
+    def __init__(self, age:int, name:str):
+        if age<0:
+            raise ValueError("age must be >0, got "+str(age))
+        self._age=age
+        self._name=name;
+    def __str__(self):
+        return self._name+","+str(self._age)
+    def getage(self):
+        return self._age
+    def getname(self):
+        return self._name
+    def __eq__(self, other):
+        return isinstance(other, self.__class__) and \
+            self._name==other._name and self._age==other._age
+
+
+@JsonSubTypes(["test.ObjectMapperTest.Bear"])
+@JsonTypeInfo(use=Id.NAME, include=As.WRAPPER_OBJECT)
+class Animal:
+    pass
+    
+    
+class Bear(Animal):
+    def __init__(self, props:Props):
+        self._props=props
+            
+    def __str__(self):
+        return "Bear["+str(self._props)+"]"
+        
+    def getprops(self):
+        return self._props
+    def __eq__(self, other):
+        return isinstance(other, self.__class__) and \
+            self._props==other._props
+
+jackson=ObjectMapper()
+
+
+obj=Bear(Props(1,'bruno'))
+res=jackson.toJson(obj)
+print("result:"+str(res))
+bson={'Bear': {'props': {'age': 1, 'name': 'bruno'}}}
+res=jackson.parse(bson, Animal)
+print("Deserialized an Animal! -->"+str(res))
+
+}}}
+
+
+
+