openjpa-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "vivek" <>
Subject Regarding Fetch groups in OpenJPA
Date Thu, 18 Oct 2007 06:30:24 GMT
Problem :Regarding Fetch groups in OpenJPA.


public class EmployeePK {


@Column(name = "EmployeeID", nullable = false)


private long employeeID;


@Column(name = "SerialNo", nullable = false)


private int serialNo;




public class Employee {




protected EmployeePK employeePK;


private String firstName;


private String lastName;


@ManyToOne private Department dept;




public class Department {


@Id private int id;


private String departmentName;





This is the sample scenario.

There are 3 entity classes, one is the primary key class.

Here normally if i am not using fetch group feature in OpenJPA, during
retrieval all fields will retrieved from employee and department tables.

But i need some fields from both the tables to be fetched first.

By seeing fetch group documentation, i couldnt get a full idea of how to
configure fetch groups for related entities.

So please give a sample configuration for the above scenario.

  • Unnamed multipart/alternative (inline, None, 0 bytes)
View raw message