Jpa criteria Problema ninja

at java.lang.Thread.run(Thread.java:619)

Caused by: javax.el.ELException: /file:/C:/evandro/instalacao/eclipse-jee-indigo

-SR2-win32/jboss-4.2.3.GA/server/default/tmp/deploy/tmp1643087879052703622lims.e

ar-contents/lims-web-1.0-SNAPSHOT-exp.war/WEB-INF/lib/lims-web-1.0-SNAPSHOT.jar!

/META-INF/tags/componentes/orcamento/itensOrcamento.jspx @233,108 value="#{Mante

rItemOrcamentoMB.itemAtual.totalPorAmostra}": Error reading ‘totalPorAmostra’ on

type br.com.cqa.lims.coleta.orcamento.ItemOrcamentoColetavel

at com.sun.facelets.el.TagValueExpression.getValue(TagValueExpression.ja

va:76)

at javax.faces.component.UIOutput.getValue(UIOutput.java:184)

… 61 more

Caused by: java.lang.NullPointerException

at br.com.cqa.lims.orcamento.PrecoPorMetodo.listaTodosMetodosDaAmostraCo

mPrecoGrupo(PrecoPorMetodo.java:297)

at br.com.cqa.lims.orcamento.ItemOrcamento.getTotalPorAmostra(ItemOrcame

nto.java:155)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.

java:39)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces

sorImpl.java:25)

at java.lang.reflect.Method.invoke(Method.java:597)

at javax.el.BeanELResolver.getValue(BeanELResolver.java:62)

at javax.el.CompositeELResolver.getValue(CompositeELResolver.java:53)

at com.sun.faces.el.FacesCompositeELResolver.getValue(FacesCompositeELRe

solver.java:72)

at org.apache.el.parser.AstValue.getValue(AstValue.java:97)

at org.apache.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:1

86)

at com.sun.facelets.el.TagValueExpression.getValue(TagValueExpression.ja

va:71)

… 62 more

public class UserDaoImpl extends BaseDaoImpl<User> implements UserDao {
	protected void addPropertiedToCriteria(DetachedCriteria criteria, User example) {
		if ( example.getEmail() != null ) {
			if( example.getEmail().getId() > 0 ) {
				criteria.add(Expression.eq("email.id", example.getEmail().getId()));
			}
			if( example.getEmail().getDescription() != null && !"".equals(example.getEmail().getDescription()) ) {
				criteria.add(Expression.eq("email.description", example.getEmail().getDescription()));
			}
		}
	}
}

chamada
*******************************************************************************************
@Entity
@Domain( { "Orcamento", "Coleta", "ExecucaoAnalise" })
@Inheritance(strategy = InheritanceType.SINGLE_TABLE)
public abstract class ItemOrcamento extends EntidadeAuditavel {

	public Dinheiro getTotalPorAmostra() {
		PrecoMetodoEspecificacao precMetEspec = new PrecoMetodoEspecificacao();
..................

}
}





******************************************************************************************
@Entity(name="PrecoPorMetodo") 
@Table(name="preco_por_metodo")

public class PrecoPorMetodo extends Entidade{
	private static final long serialVersionUID = -4715774435380827257L;

	
	private int grupo;
	@ManyToOne
	@JoinColumn(name="metodo_id", nullable=false)
	private Metodo metodo;
	@ManyToOne
	@JoinColumn(name="especificacao_id", nullable=false)
	private Especificacao especificacao;
	@Embedded
	private Dinheiro preco = new Dinheiro();


getters e setters 


public GruposDoMetodo listaGruposDoMetodo(Metodo metodo){
	System.out.println("listaGruposDoMetodo ");
	GruposDoMetodo gruposDoMetodo = new GruposDoMetodo();
	Map<Long, Dinheiro> listaGruposDoMetodo = new HashMap <Long, Dinheiro>();
	gruposDoMetodo.setMetodoId(metodo.getId());
	try{
		OrcamentoServiceBean osb = new OrcamentoServiceBean();
		List<PrecoPorMetodo> resultado1 = osb.selecionaprecopormetodo(metodo.getId().toString());
********************************************************************************************

@Stateless
@LocalBinding(jndiBinding = "OrcamentoServiceBean/local")
public class OrcamentoServiceBean implements OrcamentoServiceLocal {

	@PersistenceContext(unitName = "lims-pu")
	private EntityManager em;

	@EJB(name = "HistoricoServiceBean/local")
	private HistoricoServiceLocal historicoService;

	@EJB(name = "NumeradorServiceBean/local")
	private NumeradorServiceLocal numeradorService;

	@EJB(name = "QuestionarioServiceBean/local")
	private QuestionarioServiceLocal questionarioService;

	@EJB(name = "ConfirmarOrcamentoServiceBean/local")
	private ConfirmarOrcamentoServiceLocal confirmarOrcamentoService;

    public List<PrecoPorMetodo> selecionaprecopormetodo(String vMetodo_id) {
        try {
			StringBuffer sbQuery = new StringBuffer();
			sbQuery.append(" FROM PrecoPorMetodo ");			
		
			Query query = em.createQuery(sbQuery.toString());
			return query.getResultList();	
        	
        }
        catch (Throwable ex) {             
            System.err.println("Initial SessionFactory creation failed.----" + ex);  
            throw new ExceptionInInitializerError(ex);  
        }    	
    }