Re: EnityBeans with Pk and Fk

[Alex Paransky]

Title: EnityBeans with Pk and Fk

 There are many ways to do what you want one of them is:

 

Establish a many to 1 relationship between Emp and Dept, with Emp having a <cmr-field> called dept which would force your to write setDept(Dept dept) and Dept getDept() in your Emp bean. 

 

Using this method you can say:  emp.setDept(dept) to put an employee into a department.  You can also say emp.getDept() to find out what department employee belongs to.  You can also implement Collection Dept.getEmployees() thru EmployeeHome.findByDept(Dept dept) function.

 

-AP_

-----Original Message-----
From: A mailing list for Enterprise JavaBeans development [mailto:[EMAIL PROTECTED]]On Behalf Of Sairam.T.D.G , STC Chennai
Sent: Friday, August 17, 2001 4:40 AM
To: [EMAIL PROTECTED]
Subject: EnityBeans with Pk and Fk

Hi,

I am having two table emp, dept. Dept is a parent table and emp is a child table with deptno as common field.
i am having corresponding entity beans
In the session bean ie controller class,
If i want to insert records into the database
I think there r two ways to use the primarykey-foreign key relationship
1. creating both objects in the session bean and call the appropriate methods
2. create dept object, i am planning to keep addEmp() method in it, in this method i will create emp object from remote interface and add it.

I think second one is better in this way, encapsulation ie hiding the information about emp is achieved

plz send ur commets

SaiRamTDG
HCL Technologies Ltd