Yaml anchor error when json sub types are used

[mopsop]

When adding Json sub types management to a class to deserialize, the references to anchors are unresolved.

The following sample is derived from ObjectIdTest.

Here is new Node class (with type attribute and JsonSubTypes annotations) :

	@JsonTypeInfo(use = JsonTypeInfo.Id.NAME, 
			include = As.PROPERTY, 
			property = "type", 
			defaultImpl = NodeWithStringId.class)
	@JsonSubTypes({ 
		@JsonSubTypes.Type(value = SubNodeWithStringId.class, name= "subnode"),
		@JsonSubTypes.Type(value = NodeWithStringId.class, name = "node") 
	})
    @JsonIdentityInfo(generator=PrefixIdGenerator.class)
    static class NodeWithStringId
    {
        public String name;
        public String type;

        public NodeWithStringId next;
        
        public NodeWithStringId() { }
        public NodeWithStringId(String name) {
            this.name = name;
        }
    }	

And a related Node subtype :

    static class SubNodeWithStringId extends NodeWithStringId
    {
    }

Now the test is :

	String yml =
	            "---\n"
                    +"&id1 name: \"first\"\n"
                    +"type: \"node\"\n"
                    +"next:\n"
                    +"  &id2 name: \"second\"\n"
                    +"  next: *id1"
	        ;


	NodeWithStringId node  = mapper.readValue(yml, NodeWithStringId.class);


        assertNotNull(node);
        assertEquals("first", node.name);
        assertNotNull(node.next);
        assertEquals("second", node.next.name);
        assertNotNull(node.next.next);
        assertSame(node, node.next.next);	

The test fails with :

com.fasterxml.jackson.databind.deser.UnresolvedForwardReference: Unresolved forward references for: 
 at [Source: java.io.StringReader@3302035b; line: 6, column: 13]Object id [id1]

If the sub type annotations are removed, the test is ok

[cowtowncoder]

Type PrefixIdGenerator missing, but was able to just use ObjectIdGenerators.StringIdGenerator instead it seems.