@Table("a_table")
public class ATable {

  @Id
  private long id;

  @Column("username")
  private String username;

  @Column("bid")
  private long bid;

  @One(field = "bid", target = BTable.class)
  private BTable btable;
}

@Table("b_table")
public class BTable {

  @Id
  private long id;

  @Column("title")
  private String title;
}

有这样的查询: 
   select * from a_table a, b_table b where a.bid=b.id and a.username='who' and b.title = 'this is title';

请问如何实现查询结果为:
List<ATable> list = ...