#JsonIdentityInfo doesn't handle circular references correctly in a generic list - jackson

Question

I'm serializing and deserializing a list including two objects, with circular references there.
First I tried ObjectIdGenerators.StringIdGenerator as the generator.
//Using latest version for the dependencies
//jackson.version = 2.13.1
//jackson-jsog = 1.1.2
#NoArgsConstructor
#JsonIdentityInfo(generator = ObjectIdGenerators.StringIdGenerator.class)
public static class Outer {
#Setter
#Getter
private Inner inner;
}
#NoArgsConstructor
#JsonIdentityInfo(generator = ObjectIdGenerators.StringIdGenerator.class)
public static class Inner {
#Getter
private Outer outer;
public Inner(Outer outer) {
this.outer = outer;
outer.setInner(this);
}
}
public static void main(String[] args) throws Exception {
// There are circular references between Outer and Inner
Outer outer = new Outer();
Inner inner = new Inner(outer);
// Turn on type info
PolymorphicTypeValidator ptv = BasicPolymorphicTypeValidator.builder().allowIfSubType(Object.class).build();
ObjectMapper mapper = new ObjectMapper()
.activateDefaultTyping(ptv, ObjectMapper.DefaultTyping.EVERYTHING,
JsonTypeInfo.As.PROPERTY);
List<Object> source = Lists.newArrayList(outer, inner);
String json = mapper.writeValueAsString(source);
System.out.println(json);
//This is the json serialized by StringIdGenerator, which doesn't make sense for the second instance(no type info there,just a UUID)
//See below
List<Object> target = mapper.readerForListOf(Object.class).readValue(json);
System.out.println(target);
//So I finally got an Outer instance and a string in the target list, not equal to source list at all
//[com.foo.bar.SomeTest$Outer#4b29d1d2, acb5231d-13de-4e22-92c6-cb1ec0530de1]
}
This is the json serialized by StringIdGenerator, which doesn't make sense for the second instance(no type info there,just a UUID)
[
"java.util.ArrayList",
[
{
"#class": "com.foo.bar.SomeTest$Outer",
"#id": "df6ed346-6b27-4983-8dc2-5c07ddfa8f8f",
"inner":
{
"#class": "com.foo.bar.SomeTest$Inner",
"#id": "acb5231d-13de-4e22-92c6-cb1ec0530de1",
"outer": "df6ed346-6b27-4983-8dc2-5c07ddfa8f8f"
}
},
"acb5231d-13de-4e22-92c6-cb1ec0530de1"
]
]
Then I tried JSOGGenerator
#NoArgsConstructor
#JsonIdentityInfo(generator = JSOGGenerator.class)
public static class Outer {
#Setter
#Getter
private Inner inner;
}
#NoArgsConstructor
#JsonIdentityInfo(generator = JSOGGenerator.class)
public static class Inner {
#Getter
private Outer outer;
public Inner(Outer outer) {
this.outer = outer;
outer.setInner(this);
}
}
public static void main(String[] args) throws Exception {
// There are circular references between Outer and Inner
Outer outer = new Outer();
Inner inner = new Inner(outer);
// Turn on type info
PolymorphicTypeValidator ptv = BasicPolymorphicTypeValidator.builder().allowIfSubType(Object.class).build();
ObjectMapper mapper = new ObjectMapper()
.activateDefaultTyping(ptv, ObjectMapper.DefaultTyping.EVERYTHING,
JsonTypeInfo.As.PROPERTY);
List<Object> source = Lists.newArrayList(outer, inner);
String json = mapper.writeValueAsString(source);
System.out.println(json);
//This is the json serialized by JSOGGenerator, which does make sense
//See below
List<Object> target = mapper.readerForListOf(Object.class).readValue(json);
//However, I got an InvalidTypeIdException while deserializing
//Exception in thread "main" com.fasterxml.jackson.databind.exc.InvalidTypeIdException: Could not resolve subtype of [simple type, class com.voodoodyne.jackson.jsog.JSOGRef]: missing type id property '#class'
}
This is the json serialized by JSOGGenerator, which does make sense.
[
"java.util.ArrayList",
[
{
"#class": "com.foo.bar.SomeTest$Outer",
"#id": "1",
"inner":
{
"#class": "com.foo.bar.SomeTest$Inner",
"#id": "2",
"outer":
{
"#ref": "1"
}
}
},
{
"#ref": "2"
}
]
]
However, I got an InvalidTypeIdException while deserializing.
And I found the property "#id" is not handled correctly.
See ObjectIdValueProperty._valueDeserializer._baseType, which type is JSOGRef and it can not parse "1"(String) as object id value.
My questions
What's the correct way to deal with this?
Do we have some other generator to try?