Re: [Springframework-developer] How create Generic DAO pattern in tiger

[Achmad A. R. <a.a...@gm...>]

On 10/11/05, Achmad Arif Rachim <a.a...@gm...> wrote:
>
> Hi silvester,
>
> getActualTypeArguments are instance of TypeVariableImpl, and we cannot
> cast it into Class. Am I missing something ?
>
> thnx
>
> On 10/10/05, Bijl, Silvester van der <sil...@lo...=
m>
> wrote:
> >
> > Hi,
> >
> > I've been playing around with this. I came up with the following code:
> >
> >
> > public class AbstractBaseHibernateDao<ObjectType, IdType extends
> > Serializable> extends
> > HibernateDaoSupport implements BaseDao<ObjectType, IdType> {
> >
> > // JDK 5.0 trickery to retrieve the object class
> > private Class ourClass =3D
> > (Class)((ParameterizedType)getClass().getGenericSuperclass()).getActual=
TypeArguments()[0];
> >
> > /*
> > * Retrieve object from db.
> > */
> > @SuppressWarnings("unchecked")
> > public ObjectType get(IdType id) throws DataAccessException {
> > return (ObjectType) getHibernateTemplate().load(ourClass, id);
> > }
> >
> > }
> >
> > I declared the interface similiar to your code. Hope this helps.
> >
> > Silvester
> >
> > ________________________________
> >
> > Van: spr...@li... namens Achma=
d
> > Arif Rachim
> > Verzonden: di 11-10-2005 6:33
> > Aan: spr...@li...;
> > jug...@ya...
> > Onderwerp: [Springframework-developer] How create Generic DAO pattern i=
n
> > tiger
> >
> >
> > How to read Inherit Generic Type class ?
> >
> > Guys I've been googling all week but couldn't find solution.
> >
> > Id like to create Generic DAO pattern. So here's what i do
> >
> > public interface Dao<E extends Entity, I extends Serializable>{
> > public I create(E entity);
> > public E read(I id);
> > public void update(E entity);
> > public E delete(I id);
> > }
> >
> > concrete class would be like this
> >
> > public class DaoBean implements Dao{
> > public Serializable create(Entity entity){
> > getHibernateTemplate.save(entity);
> > return entity.getId();
> > }
> > public void update(Entity entity){
> > getHibernateTemplate.update(entity);
> > }
> > public Entity read(Serializable id){
> > return (Entity)getHibernateTemplate.load(getClass(),id);
> > }
> > public Entity delete(Serializable id){
> > Entity entity =3D read(id);
> > getHibernateTemplate.delete(entity);
> > return entity;
> > }
> >
> > public Class getEntityClass(){
> > // now ... how to get Dao E class ????
> > return E.class;
> > }
> > }
> >
> > The millon dollar* question is how to get Dao Generic E type class ???
> > (* million asked question)
> >
> > Thanx
> >
> >
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