NPE with @JsonIdentityInfo at class level

[daniel-schel]

ModelResolver throws a NullPointerException when using the IntSequenceGenerator at class level as shown in the following example.

public class Pojo {
	public Set<SubPojo> sub = new HashSet<>();
}

@JsonIdentityInfo(generator = ObjectIdGenerators.IntSequenceGenerator.class)
public class SubPojo {
	public Set<SubPojo> sources = new HashSet<>();
}

The reason for this is that because of IntSequenceGenerator a property id is generated in order to add it to the model of the class SubPojo, but modelByType at ModelConverterContextImpl does not contain an AnnotatedType for this class at this time.