Hi,

I have 2 classes (1) Designation (2) Responsibility. A designation can have multiple responsibilities, so I created a Set for the same in the Designation Class to get all the responsibilities for a Designation. Below are the details:

Class Designation {
private Integer id;
private String name;
private Set<Responsibility> responsibilities;

Getters & Setters.....
}

Table Structure for Designation: id, name

Class Responsibility {
private Integer id;
private String name;
private Integer designation_id;

Getters & Setters.....
}

Table structure for Responsibility: id, name, designation_id

Hibernate Mapping:
<set name="responsibilities">
<key column="designation_id" />
<one-to-many class="Responsibility" />
</set>

Now, I am not sure whether the above mapping is correct or not. If its correct, what does it mean in simple words, what does <key> column mean with respect to the above mapping.

Thanks
Regards

With my understanding of Hibernate I will try to explain.

-This mapping file is for Designation.

<set name="responsibilities">
-->You will have getter and setter methods for the 'responsibilities' in the Designation class
<key column="designation_id" />
-->primary key field in Designation class
<one-to-many class="Responsibility" />
-->You are saying that relation to the Responsibility class is one to many and collection contains elements of type 'Responsibility'