diff options
Diffstat (limited to 'src/main/java/nu/xss/jpa/dao/GenericJpaDao.java')
-rw-r--r-- | src/main/java/nu/xss/jpa/dao/GenericJpaDao.java | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/src/main/java/nu/xss/jpa/dao/GenericJpaDao.java b/src/main/java/nu/xss/jpa/dao/GenericJpaDao.java new file mode 100644 index 0000000..5acfffc --- /dev/null +++ b/src/main/java/nu/xss/jpa/dao/GenericJpaDao.java @@ -0,0 +1,43 @@ +package nu.xss.jpa.dao; + +import java.io.Serializable; +import java.lang.reflect.ParameterizedType; +import java.util.List; + +import javax.persistence.EntityManager; +import javax.persistence.PersistenceContext; + +public abstract class GenericJpaDao<E,K> implements Dao<E,K>, Serializable { + + private static final long serialVersionUID = 4998055731089977476L; + + @PersistenceContext + protected EntityManager entityManager; + + protected Class<E> entity; + + @SuppressWarnings("unchecked") + public GenericJpaDao() { + ParameterizedType genericSuperclass = (ParameterizedType) getClass().getGenericSuperclass(); + this.entity = (Class<E>) genericSuperclass.getActualTypeArguments()[1]; + } + + public void persist(E entity) { + entityManager.persist(entity); + + } + + public void remove(E entity) { + entityManager.remove(entity); + } + + public E findById(K id) { + return entityManager.find(entity, id); + } + + public List<E> findAll() { + // TODO Auto-generated method stub + return null; + } + +} |