import json
-class MyClass
+class A
serialize
- var other: MyClass
+ var other: nullable A
- type C: MyClass
+ type C: nullable A
var next: C
+
+ redef fun to_s do return "<{class_name} other:{other or else "null"} next:{next or else "null"}>"
+end
+
+class B
+ super A
+ serialize
+
+ redef type C: nullable B
end
class DangerSup
end
end
-var json_with_metadata = """{
- "__class": "MyClass",
+class G[E: A]
+ serialize
+ var e: E
+
+ redef fun to_s do return "<{class_name} e:{if isset _e then e.to_s else "not-set"}>"
+end
+
+redef class Deserializer
+ redef fun deserialize_class(name)
+ do
+ if name == "G[A]" then return new G[A].from_deserializer(self)
+ if name == "G[B]" then return new G[B].from_deserializer(self)
+ return super
+ end
+end
+
+var json = """{
+ "__class": "A",
"other": {"__class": "DangerSub", "dangerous_setter": "My text 1"},
"next": {"__class": "DangerSub", "dangerous_setter": "My text 2"}
}"""
-var deserializer = new JsonDeserializer(json_with_metadata)
-#alt1#deserializer.check_subtypes = false
-deserializer.deserialize
+# OK, accept only valid types, so don't try to deserialize DangerSub
+var deserializer = new JsonDeserializer(json)
+var res = deserializer.deserialize
+print deserializer.errors.join("\n")
+print res or else "null"
+
+print "---"
+
+# Accept any types, so deserialize the dangerous classes
+deserializer = new JsonDeserializer(json)
+deserializer.check_subtypes = false
+res = deserializer.deserialize
+print deserializer.errors.join("\n")
+print res or else "null"
+
+print "---"
+
+# Valid virtual type for `next: B`
+json = """{"__class": "B", "next": {"__class": "B"}}"""
+deserializer = new JsonDeserializer(json)
+res = deserializer.deserialize
+print deserializer.errors.join("\n")
+print res or else "null"
+
+print "---"
+
+# Virtual type error for `next: B`
+json = """{"__class": "B", "next": {"__class": "A"}}"""
+deserializer = new JsonDeserializer(json)
+res = deserializer.deserialize
+print deserializer.errors.join("\n")
+print res or else "null"
+
+print "---"
+
+# Valid parameter type for `e: A`
+json = """{"__class": "G[A]", "e": {"__class": "A"}}"""
+deserializer = new JsonDeserializer(json)
+res = deserializer.deserialize
+print deserializer.errors.join("\n")
+print res or else "null"
+
+print "---"
+
+# Parameter type error for `e: B`
+json = """{"__class": "G[B]", "e": {"__class": "A"}}"""
+deserializer = new JsonDeserializer(json)
+res = deserializer.deserialize
print deserializer.errors.join("\n")
+print res or else "null"