SDN4 - Display MappingException when using an interface as the end of an Entity relationship

This functionality worked at some point, but seems to have broken in the last SDN4 snapshot (7-16-15)

I have two node classes, one representing intermediate, non-leaf nodes and one representing the vertices of the first degree leaf vertices. The two classes implement a common interface.

public interface Node {
    ...
}

@NodeEntity
public class SimpleNode implements Node {
    ...
}

@NodeEntity
public class SimpleLeafNode implements Node {
    ...
}

      

        
        
        
      

    

The first one can be related to other intermediate nodes OR leaf nodes, and I modeled this relationship by mapping the class SimpleNode

to Node

INTERFACE:

@RelationshipEntity
public class SimpleRelationship {

    @StartNode
    private SimpleNode parent;

    @EndNode
    private Node child;
}

      

        
        
        
      

    

When I try to start my Spring Boot application, I get an SDN mapping exception:

Caused by:
    10:51:04.173 [DEBUG] org.neo4j.ogm.metadata.MappingException: No identity field found for class: com.sdn4demo.entity.Node
    10:51:04.174 [DEBUG]    at org.neo4j.ogm.metadata.info.ClassInfo.identityField(ClassInfo.java:291)
    10:51:04.174 [DEBUG]    at org.springframework.data.neo4j.mapping.Neo4jPersistentProperty.<init>(Neo4jPersistentProperty.java:76)
    10:51:04.174 [DEBUG]    at org.springframework.data.neo4j.mapping.Neo4jMappingContext.createPersistentProperty(Neo4jMappingContext.java:100)

      

        
        
        
      

    

Again, this worked until snapshot 7-16-15, so my questions are not supported features? This is mistake?

A contrived example exists: https://github.com/simon-lam/sdn-4-demo

Play by performing ./gradlew clean test --debug