JPAGenericDao.java

public class JPAGenericDao<T> implements GenericDao<T> {

	private EntityManager em;
	
	@Inject
	public JPAGenericDao(EntityManager em) {
		// TODO Auto-generated constructor stub
		this.em = em;
	}
	@Deprecated
	public JPAGenericDao() {
		// TODO Auto-generated constructor stub
	}
	
	private T obj;

	@Override
	public void delete(T obj) {
		// TODO Auto-generated method stub
		this.em.remove(this.em.getReference(obj.getClass(), this.em.getEntityManagerFactory().getPersistenceUnitUtil().getIdentifier(obj)));
	}
	
	@Override
	public T edit(T obj) {
		// TODO Auto-generated method stub
		return (T) this.em.find(obj.getClass(), this.em.getEntityManagerFactory().getPersistenceUnitUtil().getIdentifier(obj));
	}
	
	@Override
	public List<T> executeNamedQuery(String namedQuery, Class clazz, Object[] parameters) {
		// TODO Auto-generated method stub
		TypedQuery query = this.em.createNamedQuery(namedQuery, clazz);
		addParameters(query, parameters);
		return query.getResultList();
	}
	

	@Override
	public void executeProcedure(String procedure, Object[] parameters, Class[] clazzs) {
		// TODO Auto-generated method stub
		StoredProcedureQuery query = this.em.createStoredProcedureQuery(procedure);
		for (int i = 0; i < clazzs.length; i++) {
			query.registerStoredProcedureParameter(i, clazzs[i], ParameterMode.IN);
		}
		addParameters(query, parameters);
		query.execute();
	}
	
	@Override
	public T find(Class clazz, List<ParametrosWeb> parametrosWeb) {
		// TODO Auto-generated method stub
		try {
			return (T) this.em.createQuery(new ParametrosWebBuilder().createQuery(clazz, parametrosWeb)).setFirstResult(0).setMaxResults(1).getSingleResult();
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
			return null;
		}
	}
	
	@Override
	public List<T> findAll(Class clazz, List<ParametrosWeb> parametrosWeb) {
		// TODO Auto-generated method stub
		int max = parametrosWeb != null && parametrosWeb.get(0).getLimit() != null ? parametrosWeb.get(0).getLimit() : 100;
		try {
			return this.em.createQuery(new ParametrosWebBuilder().createQuery(clazz, parametrosWeb)).setFirstResult(0).setMaxResults(max).getResultList();
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
			return null;
		}
	}
	
	@Override