Hiin my pojo i have one object@Column(name = "GRUPO", unique = true,
nullable = false, length = 45)public String getGrupo() { return
this.grupo; }then i have a DAO Class to save object in database like
thispublic void save(Gruposdeusuarios entity) {
EntityManagerHelper.log("saving Gruposdeusuarios instance", Level.INFO,
null); EntityManagerHelper.beginTransaction(); try {
getEntityManager().persist(entity); EntityManagerHelper.commit();
EntityManagerHelper.log("save successful", Level.INFO, null...