Criteria Query with Composite Id

[mail2bansi]

I have a Search screen for searching with variable number of conditions i.e. dynamically add "and condition" to where clause in the Query. Hence i am using Criteria API from Hibernate. The query works perfectly fine as criteria.list() correctly prints the no of records in the List. The problem occurs when i am trying to access the values in the Composite object having id values. It always return null value. Then i tried accessing value within the same pojo again it return the null
Here is the pojo

public class DeviceSummaryView  implements java.io.Serializable {
   // Fields    

     private DeviceSummaryViewId id;
     private String tagNumber;
...
...
...
}
public class DeviceSummaryViewId  implements java.io.Serializable {
    // Fields    

     private Long deviceId;
     private long interfaceId;
     private Long ipId;
     private Long hostNameId;

}

Any pointers/suggestions highly appreciated

[mail2bansi]

I will appreciate any pointers/suggestions