Exception when deserializing ObjectIds generated by ObjectIdGenerators.UUIDGenerator

[fangzhen]

Here's a simple test case that will reproduce this issue. jackson version: 2.4.0

@JsonIdentityInfo(generator = ObjectIdGenerators.UUIDGenerator.class, property = "@id")
public static class D{
    public D next;
}
@Test
public void testSmileFormat() throws JsonGenerationException, JsonMappingException, IOException{
    ObjectMapper mapper = new ObjectMapper(new SmileFactory());
    D d = new D();
    d.next = d;

    mapper.enable(SerializationFeature.INDENT_OUTPUT);
    ByteArrayOutputStream os = new ByteArrayOutputStream();
    mapper.writeValue(os, d);

    ByteArrayInputStream is = new ByteArrayInputStream(os.toByteArray());
    ObjectMapper m2 = new ObjectMapper(new SmileFactory());

    D de = m2.readValue(is, D.class);   //this will throws an exception.
}

The exception thrown are like :

com.fasterxml.jackson.databind.JsonMappingException: Problem deserializing property 'next' (expected type: [simple type, class JacksonTest$D]; actual type: [B), problem: Can not set JacksonTest$D field JacksonTest$D.next to [B (through reference chain: jacksonhack.D["next"]).

Thanks.

[cowtowncoder]

Ah! The problem being use of UUID, and the fact that Smile tries to optimize serialization of UUID as 16-bytes instead of textual representation (36 characters). Very interesting... and does explain otherwise strange failure.

[cowtowncoder]

Ok. So, fix will need to go in jackson-databind, and will be in 2.4.2. But I will mark this as fixed; just make sure to use 2.4.2 of databind with smile, once that is released.