How to make string primary key hibernate. @GeneratedValue strategies

Question

My goal is to create an entity Device that has a unique field IMEI and I would like to use it as a primary key, and specify it at device registration time (manually specifie

Answer 1

At the moment, it may be unnecessary. But I think we should update this ticket for someone.

I'm new to answering on stack overflow, so hopefully this makes sense

If you want to generate String as ID in hibernate automatically, you can define a rule using IdentifierGenerator and @GenericGenerator.

Entity declaration:

public class Device {...

    @Id
    @GenericGenerator(name = "sequence_imei_id", strategy = "com.supportmycode.model.ImeiIdGenerator")
    @GeneratedValue(generator = "sequence_imei_id")
    @Column(name = "IMEI")
    private String IMEI;

...}

Imei Generator Declaration:

public class ImeiIdGenerator implements IdentifierGenerator {...
    public Serializable generate(SessionImplementor session, Object object) throws HibernateException {

            // define your IMEI, example IMEI1, IMEI2,...;
            return "IMEI"+ UUID.randomUUID().toString();
...}

When you save a Device object, IMEI(id) will be generate automatically by ImeiIdGenerator.