EJB bean in Validator JSF

Question

Я хочу проверить, существует ли номер социального страхования в базе данных. Это мой валидатор.

@RequestScoped 
@FacesValidator("personalIdValidator") 
public class PersonalIdValidator implements Validator { 

    @EJB 
    private UserDaoLocal userDao; 

    @Override 
    public void validate(FacesContext context, UIComponent component, 
      Object value) throws ValidatorException { 

     boolean ok; 
     String personalId = value.toString(); 
     String regex = "[0-9]{11}"; 
     ok = Pattern.matches(regex, personalId); 

     if (!ok || userDao.findUserExist(personalId)) { 
      throw new ValidatorException(new FacesMessage(FacesMessage.SEVERITY_ERROR, "Błędny pesel", "Błędny pesel")); 
     } 
    } 
} 

В валидатора у меня есть @EJB userDao и я это метод userDao.findUserExist(personalId) Этот метод:

@Override 
public boolean findUserExist(String personalId) { 
    try { 
     Query q = em.createQuery("SELECT u FROM User u WHERE u.personalId = :personalId"); 
     q.setParameter("personalId", personalId); 
     user = (User) q.getSingleResult(); 
     if(user == null) { 
      return false; 
     } else { 
      return true; 
     } 

    } catch (Exception e) { 
     System.out.println("Błąd" + e.getMessage()); 
     return false; 
    } 
} 

Но когда я делаю этот метод у меня есть ошибка:

WARNING: StandardWrapperValve[Faces Servlet]: PWC1406: Servlet.service() for servlet Faces Servlet threw exception java.lang.NullPointerException at pl.ePrzychodnia.validators.PersonalIdValidator.validate(PersonalIdValidator.java:41) at javax.faces.component.UIInput.validateValue(UIInput.java:1149) at javax.faces.component.UIInput.validate(UIInput.java:967) at javax.faces.component.UIInput.executeValidate(UIInput.java:1233) at javax.faces.component.UIInput.processValidators(UIInput.java:698) at javax.faces.component.UIComponentBase.processValidators(UIComponentBase.java:1214) at javax.faces.component.UIComponentBase.processValidators(UIComponentBase.java:1214) at org.primefaces.component.panel.Panel.processValidators(Panel.java:297) at javax.faces.component.UIForm.processValidators(UIForm.java:253) at javax.faces.component.UIComponentBase.processValidators(UIComponentBase.java:1214) at javax.faces.component.UIComponentBase.processValidators(UIComponentBase.java:1214) at javax.faces.component.UIViewRoot.processValidators(UIViewRoot.java:1172) at com.sun.faces.lifecycle.ProcessValidationsPhase.execute(ProcessValidationsPhase.java:76) at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101) at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118) at javax.faces.webapp.FacesServlet.service(FacesServlet.java:593) at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1550) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:281) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175) at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:655) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:595) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:161) at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:331) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:231) at com.sun.enterprise.v3.services.impl.ContainerMapper$AdapterCallable.call(ContainerMapper.java:317) at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:195) at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:860) at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:757) at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1056) at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:229) at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137) at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104) at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90) at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79) at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54) at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59) at com.sun.grizzly.ContextTask.run(ContextTask.java:71) at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532) at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513) at java.lang.Thread.run(Thread.java:722)

Answer 1

Первый:

Заменить

String personalId = value.toString(); 

По

String confirm = (String) component.getAttributes().get("theInputFromYourPage"); 

Вы также можете попробовать это:

private static final String regex = "[0-9]{11}"; 
private Pattern pattern; 
private Matcher matcher; 

public PersonalIdValidator() { 
    pattern = Pattern.compile(regex); 
} 

public void validate(FacesContext context, UIComponent component, 
     Object value) throws ValidatorException { 
    // TODO Auto-generated method stub 
    matcher = pattern.matcher(value.toString()); 
    if (!matcher.matches()) { 


     // DO YOUR STUFF QUERY 


    } else { 
        // FacesMessages, invite the user to respect regex [0-9]{11} 
      } 
}