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

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

Hi sivester,

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...>
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()).getActualTy=
peArguments()[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 Achmad
> Arif Rachim
> Verzonden: di 11-10-2005 6:33
> Aan: spr...@li...;
> jug...@ya...
> Onderwerp: [Springframework-developer] How create Generic DAO pattern in
> 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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