JPA Criteria: issue of querying properties of subclass -

i using hibernate 4.3.6.final, supports jpa 2.1. need build complex query based on user input. got rest done , working, still have problem. let's put metamodel or other solutions aside see how current problem can solved.

the following class structure , relationships:

class baseobject implements serializable { }  class extends baseobject{      @onetomany(mappedby = "aref", fetch = fetchtype.lazy,     cascade = {cascadetype.persist, cascadetype.remove, cascadetype.merge}, orphanremoval = true)      private list<b> blist;  }  class b extends baseobject {      @manytoone(fetch = fetchtype.lazy)     @joincolumn(name = "aref")     private aref;   }  //-------------note subclass of b------------ class c extends b {      @onetomany(mappedby = "cref", fetch = fetchtype.lazy,     cascade = {cascadetype.persist, cascadetype.remove, cascadetype.merge}, orphanremoval = true)      private list<d> dlist;  }  class d {     @manytoone(fetch = fetchtype.lazy)     @joincolumn(name = "cref")     private c cref;       string name; } 

now want list objects whose, after join, value of "name" field in class d "john". here have:

criteriabuilder cb = entitymanager.getcriteriabuilder(); criteriaquery cq = cb.createquery();  root<a> root = cq.from(a.class);  criteriaquery<object> select = cq.select(root);  join bjoin = root.join("blist");      join cjoin = cb.treat(bjoin, c.class);  join djoin = cjoin.join("dlist");      //error happens here predicate p = cb.equal(djoin.get("name"), "john");  cq.where(p);  query query = em.createquery(select); list<a> result = query.getresultlist(); 

but keep getting following error:

unable locate attribute the given name [dlist] on managedtype [baseobject]

is doing correct? how fix problem? thought using treat method should find property on subclass.

thanks!