key « HBM « JPA Q&A

1. avoid duplication with auto increment key in Hibernate

I am trying to use Hibernate to auto increment the id, however, I try to avoid duplication.

class Service
    Long id; // auto increment
    String ...

2. AttributeOverride breaks key of embedded map in hbm2ddl

package com.demo.entity; import javax.persistence.Embedded; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.Id; @Entity public class Product { private Long id; private LocalString description; @Id @GeneratedValue public Long getId() { return id; } @Embedded public LocalString getDescription() ...

3. Can generated hbm files be used for key generation

Hibernate version: 2.1.3 Name and version of the database you are using:Teradata 5.1 Requirement is to use similar xml file the way hbm.xml files are generated. These xml files are o be used to knowing the composite key combination and generating unique key sequences. Can i reuse the hbm.xml files generated by xdoclet? Is there any way i can generate subset ...