# This method should be redefined for each custom subclass of `Serializable`.
# All refinement should look for a precise `class_name` and call super
# on unsupported classes.
- protected fun deserialize_class(class_name: String): Object do
+ protected fun deserialize_class(class_name: String): nullable Object do
+ if class_name == "Error" then return new Error.from_deserializer(self)
return deserialize_class_intern(class_name)
end
# Refinements to this method will be generated by the serialization phase.
# To avoid conflicts, there should not be any other refinements to this method.
# You can instead use `deserialize_class`.
- protected fun deserialize_class_intern(class_name: String): Object do
- print "Error: doesn't know how to deserialize class \"{class_name}\""
- abort
+ protected fun deserialize_class_intern(class_name: String): nullable Object do
+ errors.add new Error("Deserialization Error: Doesn't know how to deserialize class \"{class_name}\"")
+ return null
end
# Should `self` keep trying to deserialize an object after an error?
# When at `true`, this may cause the accumulation of a lot of entries in `errors`.
#
# Default at `true`.
- var keep_going: nullable Bool is writable
+ var keep_going: nullable Bool = null is writable
# Errors encountered in the last call to `deserialize`
var errors = new Array[Error]
# Create an instance of this class from the `deserializer`
#
# This constructor is refined by subclasses to correctly build their instances.
- init from_deserializer(deserializer: Deserializer) do end
+ init from_deserializer(deserializer: Deserializer) is nosuper do end
end
redef interface Object
end
end
-redef class Container[E]
+redef class Ref[E]
super Serializable
redef init from_deserializer(v)
v.serialize_attribute("item", first)
end
end
+
+redef class Error
+ super Serializable
+
+ redef init from_deserializer(v)
+ do
+ v.notify_of_creation self
+
+ var message = v.deserialize_attribute("message")
+ if not message isa String then message = ""
+ init message
+
+ var cause = v.deserialize_attribute("cause")
+ if cause isa nullable Error then self.cause = cause
+ end
+
+ redef fun core_serialize_to(v)
+ do
+ v.serialize_attribute("message", message)
+ v.serialize_attribute("cause", cause)
+ end
+end