You could start with a generic DAO pattern that is just a thin wrapper around
an entity manager, something like the following:
| public interface GenericDao
| {
| public <T extends BaseEntity> void save (T entity);
|
| public <T extends BaseEntity> void delete (T entity);
|
| public <T extends BaseEntity> void delete (Class<T> clazz, Serializable
id) ;
|
| public <T extends BaseEntity> T find (Class<T> clazz, Serializable id) ;
|
| public <T extends BaseEntity> List<T> list (Class<T> clazz) ;
|
| public <T extends BaseEntity> T findByExample (T example);
|
| public <T extends BaseEntity> List<T> listByExample (T example);
| }
|
Then you'd still have the option to switch your persistence layer should the
need arise.
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