DaoFactory (Produtor de DAO<T>)

DaoFactory.java

package br.com.weblog.service.factory;

import br.com.weblog.service.dao.DAO;
import java.lang.reflect.ParameterizedType;
import javax.enterprise.inject.Produces;
import javax.enterprise.inject.spi.InjectionPoint;
import javax.inject.Inject;
import javax.persistence.EntityManager;

/**
 * Produtor de DAO<T>
 *
 * @author Dilnei Cunha.
 */
public class DaoFactory {

    @Inject
    EntityManager entityManager;
    @Inject
    InjectionPoint injectionPoint;

    @Produces
    public DAO create() {
        ParameterizedType type = (ParameterizedType) injectionPoint.getType();
        Class classe = (Class) type.getActualTypeArguments()[0];
        return new DAO(classe, entityManager);
    }
}