Generico.java

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package ec.gob.mcds.seguridades.generico;

import ec.gob.mcds.seguridades.model.AuditoriaGeneral;
import java.io.Serializable;
import java.util.Date;
import java.util.List;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;

/**
 *
 * @author christian
 */
public class Generico<T> implements Serializable {

    @PersistenceContext(unitName = "SeguridadesEjbPU")
    private EntityManager entityManager;
    private Class<T> entityClass;

    public Generico(Class<T> entityClass) {
        this.entityClass = entityClass;
    }
    
    public void create(T entity) {
        getEntityManager().persist(entity);
    }

    public void create(T entity, Object audit) {
        getEntityManager().persist(entity);
        AuditoriaGeneral obj = (AuditoriaGeneral) audit;
        obj.setAguComandoejecutado("INSERT INTO "+entity.getClass().getName()+" VALUES ("+entity.toString()+")");
        obj.setAguAccion("GUARDAR");
        obj.setAguFecharegistro(new Date());
        getEntityManager().persist(obj);
    }

    public void edit(T entity) {
        getEntityManager().merge(entity);
    }

    public void edit(T entity, Object audit) {
        getEntityManager().merge(entity);
        AuditoriaGeneral obj = (AuditoriaGeneral) audit;
        obj.setAguAccion("ACTUALIZAR");
        obj.setAguFecharegistro(new Date());
        obj.setAguComandoejecutado("UPDATE "+entity.getClass().getName()+" SET "+entity.toString()+"");
        getEntityManager().persist(audit);
    }

    public void remove(T entity) {
        getEntityManager().remove(getEntityManager().merge(entity));
    }

    public T find(Object id) {
        return getEntityManager().find(entityClass, id);
    }

    public List<T> findAll() {
        javax.persistence.criteria.CriteriaQuery cq = getEntityManager().getCriteriaBuilder().createQuery();
        cq.select(cq.from(entityClass));
        return getEntityManager().createQuery(cq).getResultList();
    }

    public List<T> findRange(int[] range) {
        javax.persistence.criteria.CriteriaQuery cq = getEntityManager().getCriteriaBuilder().createQuery();
        cq.select(cq.from(entityClass));
        javax.persistence.Query q = getEntityManager().createQuery(cq);
        q.setMaxResults(range[1] - range[0]);
        q.setFirstResult(range[0]);
        return q.getResultList();
    }

    public int count() {
        javax.persistence.criteria.CriteriaQuery cq = getEntityManager().getCriteriaBuilder().createQuery();
        javax.persistence.criteria.Root<T> rt = cq.from(entityClass);
        cq.select(getEntityManager().getCriteriaBuilder().count(rt));
        javax.persistence.Query q = getEntityManager().createQuery(cq);
        return ((Long) q.getSingleResult()).intValue();
    }

    /**
     * @return the entityManager
     */
    public EntityManager getEntityManager() {
        return entityManager;
    }

    /**
     * @param entityManager the entityManager to set
     */
    public void setEntityManager(EntityManager entityManager) {
        this.entityManager = entityManager;
    }
}