ClassCastException lorsque deux contrôleurs sont utilisés dans un seul JSF

Question

Je développe une application JSF avec JPA en utilisant Netbeans. Je crée des classes Entity et génère ensuite des pages JSF à partir des classes Entity via Netbeans. Il crée un AbstractFacade, une façade étendant la façade abstraite pour chaque entité, un bean contrôleur pour chaque entité et une page JSF. Ensuite, je modifie et utilise ces codes générés pour créer ma logique.

Il est par intermittence unClassCastException lorsque j'utilise deux grains de contrôleur au sein d'une seule page JSF. Mais lorsque je redémarre le serveur GLassFish, l'exception disparaît pendant un certain temps et réapparaît et je ne peux pas savoir ce qui a déclenché la modification. Par exemple, considérons une situation dans laquelle une entité appelée Atm.It a une propriété MedicineGroup, qui est également une autre entité. Quand un objet de l'entité Atm va être sauvegardé à travers une page JSF, j'obtiens tous les MedicineGroups appelant le MedicineGroupController et l'assignant à une propriété GenericName sélectionnée de l'objet Atm. Cette logique fonctionne bien jusqu'à ce que ClassCastException se produire.

(La même méthode ci-dessus est utilisé dans la plupart des pages JSF. Entité Atm possède une propriété de VTM. AmpP a peoperties comme Atm atm, MeasurmentUnit strengthUnit, force Double, Double rol, etc.)

Je peux aussi obtenir la même chose en changeant la logique de sorte qu'il n'y aura qu'un seul contrôleur pour chaque page JSF, mais il est très facile si plusieurs beans de contrôleur peuvent être référencés dans la même page JSF.

Quel est le problème ici?

---

J'ai énuméré un code important ci-dessous.

La partie appropriée de la page JSF.

<h:selectOneListbox id="txtGroup" value="#{vtmController.current.medicineGroup}" size="5" > 
    <f:selectItems value="#{medicineGroupController.items}" var="gp" itemValue="#{gp}" itemLabel="#{gp.name}"/> 
</h:selectOneListbox> 

---

l'exemple d'une classe d'entité

@Entity 
@Inheritance 
public class Vtm extends PharmaceuticalItem implements Serializable { 

@ManyToOne 
MedicineGroup medicineGroup; 

public MedicineGroup getMedicineGroup() { 
    return medicineGroup; 
} 

public void setMedicineGroup(MedicineGroup medicineGroup) { 
    this.medicineGroup = medicineGroup; 
} 



} 

---

L'exemple de classe de contrôleur qui comprend un convertisseur auto-généré.

@ManagedBean 
@SessionScoped 
public final class VtmController { 

@EJB 
private VtmFacade ejbFacade; 
SessionController sessionController = new SessionController(); 
List<Vtm> lstItems; 
private Vtm current; 
private DataModel<Vtm> items = null; 
private int selectedItemIndex; 
boolean selectControlDisable = false; 
boolean modifyControlDisable = true; 
String selectText = ""; 

public VtmController() { 
} 

public List<Vtm> getLstItems() { 
    return getFacade().findBySQL("Select d From Vtm d"); 
} 

public void setLstItems(List<Vtm> lstItems) { 
    this.lstItems = lstItems; 
} 

public int getSelectedItemIndex() { 
    return selectedItemIndex; 
} 

public void setSelectedItemIndex(int selectedItemIndex) { 
    this.selectedItemIndex = selectedItemIndex; 
} 

public Vtm getCurrent() { 
    if (current == null) { 
     current = new Vtm(); 
    } 
    return current; 
} 

public void setCurrent(Vtm current) { 
    this.current = current; 
} 

private VtmFacade getFacade() { 
    return ejbFacade; 
} 

public DataModel<Vtm> getItems() { 
    items = new ListDataModel(getFacade().findAll("name", true)); 
    return items; 
} 

public static int intValue(long value) { 
    int valueInt = (int) value; 
    if (valueInt != value) { 
     throw new IllegalArgumentException(
       "The long value " + value + " is not within range of the int type"); 
    } 
    return valueInt; 
} 

public DataModel searchItems() { 
    recreateModel(); 
    if (items == null) { 
     if (selectText.equals("")) { 
      items = new ListDataModel(getFacade().findAll("name", true)); 
     } else { 
      items = new ListDataModel(getFacade().findAll("name", "%" + selectText + "%", 
        true)); 
      if (items.getRowCount() > 0) { 
       items.setRowIndex(0); 
       current = (Vtm) items.getRowData(); 
       Long temLong = current.getId(); 
       selectedItemIndex = intValue(temLong); 
      } else { 
       current = null; 
       selectedItemIndex = -1; 
      } 
     } 
    } 
    return items; 

} 

public Vtm searchItem(String itemName, boolean createNewIfNotPresent) { 
    Vtm searchedItem = null; 
    items = new ListDataModel(getFacade().findAll("name", itemName, true)); 
    if (items.getRowCount() > 0) { 
     items.setRowIndex(0); 
     searchedItem = (Vtm) items.getRowData(); 
    } else if (createNewIfNotPresent) { 
     searchedItem = new Vtm(); 
     searchedItem.setName(itemName); 
     searchedItem.setCreatedAt(Calendar.getInstance().getTime()); 
     searchedItem.setCreater(sessionController.loggedUser); 
     getFacade().create(searchedItem); 
    } 
    return searchedItem; 
} 

private void recreateModel() { 
    items = null; 
} 

public void prepareSelect() { 
    this.prepareModifyControlDisable(); 
} 

public void prepareEdit() { 
    if (current != null) { 
     selectedItemIndex = intValue(current.getId()); 
     this.prepareSelectControlDisable(); 
    } else { 
     JsfUtil.addErrorMessage(new MessageProvider().getValue("nothingToEdit")); 
    } 
} 

public void prepareAdd() { 
    selectedItemIndex = -1; 
    current = new Vtm(); 
    this.prepareSelectControlDisable(); 
} 

public void saveSelected() { 
    if (selectedItemIndex > 0) { 
     getFacade().edit(current); 
     JsfUtil.addSuccessMessage(new MessageProvider().getValue("savedOldSuccessfully")); 
    } else { 
     current.setCreatedAt(Calendar.getInstance().getTime()); 
     current.setCreater(sessionController.loggedUser); 
     getFacade().create(current); 
     JsfUtil.addSuccessMessage(new MessageProvider().getValue("savedNewSuccessfully")); 
    } 
    this.prepareSelect(); 
    recreateModel(); 
    getItems(); 
    selectText = ""; 
    selectedItemIndex = intValue(current.getId()); 
} 

public void addDirectly() { 
    JsfUtil.addSuccessMessage("1"); 
    try { 

     current.setCreatedAt(Calendar.getInstance().getTime()); 
     current.setCreater(sessionController.loggedUser); 

     getFacade().create(current); 
     JsfUtil.addSuccessMessage(new MessageProvider().getValue("savedNewSuccessfully")); 
     current = new Vtm(); 
    } catch (Exception e) { 
     JsfUtil.addErrorMessage(e, "Error"); 
    } 

} 

public void cancelSelect() { 
    this.prepareSelect(); 
} 

public void delete() { 
    if (current != null) { 
     current.setRetired(true); 
     current.setRetiredAt(Calendar.getInstance().getTime()); 
     current.setRetirer(sessionController.loggedUser); 
     getFacade().edit(current); 
     JsfUtil.addSuccessMessage(new MessageProvider().getValue("deleteSuccessful")); 
    } else { 
     JsfUtil.addErrorMessage(new MessageProvider().getValue("nothingToDelete")); 
    } 
    recreateModel(); 
    getItems(); 
    selectText = ""; 
    selectedItemIndex = -1; 
    current = null; 
    this.prepareSelect(); 
} 

public boolean isModifyControlDisable() { 
    return modifyControlDisable; 
} 

public void setModifyControlDisable(boolean modifyControlDisable) { 
    this.modifyControlDisable = modifyControlDisable; 
} 

public boolean isSelectControlDisable() { 
    return selectControlDisable; 
} 

public void setSelectControlDisable(boolean selectControlDisable) { 
    this.selectControlDisable = selectControlDisable; 
} 

public String getSelectText() { 
    return selectText; 
} 

public void setSelectText(String selectText) { 
    this.selectText = selectText; 
    searchItems(); 
} 

public void prepareSelectControlDisable() { 
    selectControlDisable = true; 
    modifyControlDisable = false; 
} 

public void prepareModifyControlDisable() { 
    selectControlDisable = false; 
    modifyControlDisable = true; 
} 

@FacesConverter(forClass = Vtm.class) 
public static class VtmControllerConverter implements Converter { 

    public Object getAsObject(FacesContext facesContext, UIComponent component, String value) { 
     if (value == null || value.length() == 0) { 
      return null; 
     } 
     VtmController controller = (VtmController) facesContext.getApplication().getELResolver(). 
       getValue(facesContext.getELContext(), null, "vtmController"); 
     return controller.ejbFacade.find(getKey(value)); 
    } 

    java.lang.Long getKey(String value) { 
     java.lang.Long key; 
     key = Long.valueOf(value); 
     return key; 
    } 

    String getStringKey(java.lang.Long value) { 
     StringBuffer sb = new StringBuffer(); 
     sb.append(value); 
     return sb.toString(); 
    } 

    public String getAsString(FacesContext facesContext, UIComponent component, Object object) { 
     if (object == null) { 
      return null; 
     } 
     if (object instanceof Vtm) { 
      Vtm o = (Vtm) object; 
      return getStringKey(o.getId()); 
     } else { 
      throw new IllegalArgumentException("object " + object + " is of type " 
        + object.getClass().getName() + "; expected type: " + VtmController.class.getName()); 
     } 
    } 
} 
} 

---

Un exemple d'une façade

@Stateless 
public class VtmFacade extends AbstractFacade<Vtm> { 
@PersistenceContext(unitName = "HOPU") 
private EntityManager em; 

@Override 
protected EntityManager getEntityManager() { 
    return em; 
} 

public VtmFacade() { 
    super(Vtm.class); 
} 


} 

---

La façade abstrait généré et les changements que je fis.

public abstract class AbstractFacade<T> { 

protected Class<T> entityClass; 

public AbstractFacade(Class<T> entityClass) { 
    this.entityClass = entityClass; 
} 

protected abstract EntityManager getEntityManager(); 

public void create(T entity) { 
    getEntityManager().persist(entity); 
} 

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

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

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

public List<T> findAll(boolean withoutRetired) { 
    return findAll(null, null, withoutRetired); 
} 

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

public List<T> findAll(String fieldName) { 
    return findAll(fieldName, "", false); 
} 

public List<T> findAll(String fieldName, boolean withoutRetired) { 
    return findAll(fieldName, "", withoutRetired); 
} 

public List<T> findAll(String fieldName, String fieldValue) { 
    return findAll(fieldName, fieldValue, false); 
} 

public List<T> findBySQL(String temSQL) { 
    TypedQuery<T> qry = getEntityManager().createQuery(temSQL, entityClass); 
    return qry.getResultList(); 
} 


public List<T> findBySQL(String temSQL, Map<String, Date> parameters) { 
    TypedQuery<T> qry = getEntityManager().createQuery(temSQL, entityClass); 
    Set s=parameters.entrySet(); 
    Iterator it=s.iterator(); 
    while (it.hasNext()){ 
     Map.Entry m=(Map.Entry)it.next(); 
     Date pVal = (Date) m.getValue(); 
     String pPara=(String) m.getKey(); 
     qry.setParameter(pPara, pVal, TemporalType.DATE); 
     System.out.println("Parameter " + pPara + "\tVal" + pVal); 
    } 
    return qry.getResultList(); 
}  

private void test(Class myClass, Object ob) { 
} 

public List<T> findAll(String fieldName, String fieldValue, boolean withoutRetired) { 
    javax.persistence.criteria.CriteriaBuilder cb = getEntityManager().getCriteriaBuilder(); 
    javax.persistence.criteria.CriteriaQuery<T> cq = cb.createQuery(entityClass); 
    javax.persistence.criteria.Root<T> rt = cq.from(entityClass); 
    ParameterExpression<String> p = cb.parameter(String.class); 
    Predicate predicateField = cb.like(rt.<String>get(fieldName), fieldValue); 
    Predicate predicateRetired = cb.equal(rt.<Boolean>get("retired"), false); 
    Predicate predicateFieldRetired = cb.and(predicateField, predicateRetired); 

    if (withoutRetired && !fieldValue.equals("")) { 
     cq.where(predicateFieldRetired); 
    } else if (withoutRetired) { 
     cq.where(predicateRetired); 
    } else if (!fieldValue.equals("")) { 
     cq.where(predicateField); 
    } 

    if (!fieldName.equals("")) { 
     cq.orderBy(cb.asc(rt.get(fieldName))); 
    } 

    return getEntityManager().createQuery(cq).getResultList(); 
} 

public List<T> findExact(String fieldName, String fieldValue, boolean withoutRetired) { 
    javax.persistence.criteria.CriteriaBuilder cb = getEntityManager().getCriteriaBuilder(); 
    javax.persistence.criteria.CriteriaQuery<T> cq = cb.createQuery(entityClass); 
    javax.persistence.criteria.Root<T> rt = cq.from(entityClass); 
    ParameterExpression<String> p = cb.parameter(String.class); 
    Predicate predicateField = cb.equal(cb.upper(rt.<String>get(fieldName)), fieldValue.toLowerCase()); 
    Predicate predicateRetired = cb.equal(rt.<Boolean>get("retired"), false); 
    Predicate predicateFieldRetired = cb.and(predicateField, predicateRetired); 

    if (withoutRetired && !fieldValue.equals("")) { 
     cq.where(predicateFieldRetired); 
    } else if (withoutRetired) { 
     cq.where(predicateRetired); 
    } else if (!fieldValue.equals("")) { 
     cq.where(predicateField); 
    } 

    if (!fieldName.equals("")) { 
     cq.orderBy(cb.asc(rt.get(fieldName))); 
    } 

    return getEntityManager().createQuery(cq).getResultList(); 
} 

public T findByField(String fieldName, String fieldValue, boolean withoutRetired) { 
    List<T> lstAll = findExact(fieldName, fieldValue, true); 
    if (lstAll.isEmpty()) { 
     return null; 
    } else { 
     return lstAll.get(0); 
    } 
} 

public T findFirstBySQL(String temSQL) { 
    TypedQuery<T> qry = getEntityManager().createQuery(temSQL, entityClass); 
    try { 
     return qry.getResultList().get(0); 
    } catch (Exception e) { 
     System.out.println(e.getMessage()); 
     return null; 
    } 
} 

public <U> List<T> testMethod(U[] a, Collection<U> all) { 
    List<T> myList = new ArrayList<T>(); 
    return myList; 
} 

public <U> List<T> findAll(String fieldName, int searchID, boolean withoutRetired) { 

    javax.persistence.criteria.CriteriaBuilder cb = getEntityManager().getCriteriaBuilder(); 
    javax.persistence.criteria.CriteriaQuery<T> cq = cb.createQuery(entityClass); 
    javax.persistence.criteria.Root<T> rt = cq.from(entityClass); 

    if (withoutRetired) { 
     cq.where(cb.and(cb.equal(rt.get("retired"), false)), 
       (cb.equal(rt.get(fieldName).get("id"), searchID))); 
    } else { 
     cq.where(cb.equal(rt.get("retired"), false)); 
    } 

    return getEntityManager().createQuery(cq).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(); 
} 


public Double findAggregateDbl(String strJQL){ 
    Query q= getEntityManager().createQuery(strJQL); 
    try{ 
     return (Double) q.getSingleResult(); 
    }catch (Exception e){ 
     System.out.println(e.getMessage()); 
     return 0.0; 
    } 
} 


} 

---

C'est le code qui est désigné par l'exception.

  AtmController controller = (AtmController) facesContext.getApplication().getELResolver(). 
       getValue(facesContext.getELContext(), null, "atmController"); 

Dans différents cas, ce même lieu correspondant, mais un contrôleur différent. Quand une erreur survient une fois, malgré l'accès après la page JSF, le même contrôleur donne l'erreur, mais après le redémarrage du serveur, le contrôleur diffère en fonction de la page où l'erreur a commencé à se produire.

Il s'agit de la trace de pile complète. (Le nom des classes de contrôleur change en fonction de la page JSF j'utiliser pour l'accès.)

INFO: java.lang.ClassCastException: gov.sp.health.bean.VtmController cannot be cast to gov.sp.health.bean.AtmController 
java.lang.ClassCastException: gov.sp.health.bean.VtmController cannot be cast to gov.sp.health.bean.AtmController 
    at gov.sp.health.bean.AtmController$VtmControllerConverter.getAsObject(AtmController.java:252) 
    at com.sun.faces.renderkit.html_basic.HtmlBasicInputRenderer.getConvertedValue(HtmlBasicInputRenderer.java:171) 
    at com.sun.faces.renderkit.html_basic.MenuRenderer.convertSelectOneValue(MenuRenderer.java:202) 
    at com.sun.faces.renderkit.html_basic.MenuRenderer.getConvertedValue(MenuRenderer.java:319) 
    at javax.faces.component.UIInput.getConvertedValue(UIInput.java:1030) 
    at javax.faces.component.UIInput.validate(UIInput.java:960) 
    at javax.faces.component.UIInput.executeValidate(UIInput.java:1233) 
    at javax.faces.component.UIInput.processValidators(UIInput.java:698) 
    at com.sun.faces.context.PartialViewContextImpl$PhaseAwareVisitCallback.visit(PartialViewContextImpl.java:508) 
    at com.sun.faces.component.visit.PartialVisitContext.invokeVisitCallback(PartialVisitContext.java:183) 
    at javax.faces.component.UIComponent.visitTree(UIComponent.java:1590) 
    at javax.faces.component.UIComponent.visitTree(UIComponent.java:1601) 
    at javax.faces.component.UIComponent.visitTree(UIComponent.java:1601) 
    at javax.faces.component.UIComponent.visitTree(UIComponent.java:1601) 
    at javax.faces.component.UIComponent.visitTree(UIComponent.java:1601) 
    at javax.faces.component.UIComponent.visitTree(UIComponent.java:1601) 
    at javax.faces.component.UIComponent.visitTree(UIComponent.java:1601) 
    at javax.faces.component.UIForm.visitTree(UIForm.java:344) 
    at javax.faces.component.UIComponent.visitTree(UIComponent.java:1601) 
    at javax.faces.component.UIComponent.visitTree(UIComponent.java:1601) 
    at javax.faces.component.UIComponent.visitTree(UIComponent.java:1601) 
    at javax.faces.component.UIComponent.visitTree(UIComponent.java:1601) 
    at javax.faces.component.UIComponent.visitTree(UIComponent.java:1601) 
    at javax.faces.component.UIComponent.visitTree(UIComponent.java:1601) 
    at javax.faces.component.UIComponent.visitTree(UIComponent.java:1601) 
    at com.sun.faces.context.PartialViewContextImpl.processComponents(PartialViewContextImpl.java:376) 
    at com.sun.faces.context.PartialViewContextImpl.processPartial(PartialViewContextImpl.java:252) 
    at javax.faces.context.PartialViewContextWrapper.processPartial(PartialViewContextWrapper.java:183) 
    at javax.faces.component.UIViewRoot.processValidators(UIViewRoot.java:1170) 
    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:1542) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:343) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:217) 
    at org.primefaces.webapp.filter.FileUploadFilter.doFilter(FileUploadFilter.java:79) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:256) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:217) 
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:279) 
    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$AdapterCallable.call(ContainerMapper.java:317) 
    at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:195) 
    at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:849) 
    at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:746) 
    at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1045) 
    at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:228) 
    at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137) 
    at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104) 
    at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90) 
    at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79) 
    at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54) 
    at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59) 
    at com.sun.grizzly.ContextTask.run(ContextTask.java:71) 
    at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532) 
    at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513) 
    at java.lang.Thread.run(Thread.java:722) 

---

Converter intérieur AtmController

@FacesConverter(forClass = Atm.class) 
public static class AtmControllerConverter implements Converter { 

    public Object getAsObject(FacesContext facesContext, UIComponent component, String value) { 
     if (value == null || value.length() == 0) { 
      return null; 
     } 
     AtmController controller = (AtmController) facesContext.getApplication().getELResolver(). 
       getValue(facesContext.getELContext(), null, "atmController"); 
     return controller.ejbFacade.find(getKey(value)); 
    } 

    java.lang.Long getKey(String value) { 
     java.lang.Long key; 
     key = Long.valueOf(value); 
     return key; 
    } 

    String getStringKey(java.lang.Long value) { 
     StringBuffer sb = new StringBuffer(); 
     sb.append(value); 
     return sb.toString(); 
    } 

    public String getAsString(FacesContext facesContext, UIComponent component, Object object) { 
     if (object == null) { 
      return null; 
     } 
     if (object instanceof Atm) { 
      Atm o = (Atm) object; 
      return getStringKey(o.getId()); 
     } else { 
      throw new IllegalArgumentException("object " + object + " is of type " 
        + object.getClass().getName() + "; expected type: " + AtmController.class.getName()); 
     } 
    } 
} 

---

Converter dans la VtmController

@FacesConverter(forClass = Vtm.class) 
public static class VtmControllerConverter implements Converter { 

    public Object getAsObject(FacesContext facesContext, UIComponent component, String value) { 
     if (value == null || value.length() == 0) { 
      return null; 
     } 
     VtmController controller = (VtmController) facesContext.getApplication().getELResolver(). 
       getValue(facesContext.getELContext(), null, "vtmController"); 
     return controller.ejbFacade.find(getKey(value)); 
    } 

    java.lang.Long getKey(String value) { 
     java.lang.Long key; 
     key = Long.valueOf(value); 
     return key; 
    } 

    String getStringKey(java.lang.Long value) { 
     StringBuffer sb = new StringBuffer(); 
     sb.append(value); 
     return sb.toString(); 
    } 

    public String getAsString(FacesContext facesContext, UIComponent component, Object object) { 
     if (object == null) { 
      return null; 
     } 
     if (object instanceof Vtm) { 
      Vtm o = (Vtm) object; 
      return getStringKey(o.getId()); 
     } else { 
      throw new IllegalArgumentException("object " + object + " is of type " 
        + object.getClass().getName() + "; expected type: " + VtmController.class.getName()); 
     } 
    } 
} 

---

Converter dans la MedicineGroupController

@FacesConverter(forClass = MedicineGroup.class) 
public static class MedicineGroupControllerConverter implements Converter { 

    public Object getAsObject(FacesContext facesContext, UIComponent component, String value) { 
     if (value == null || value.length() == 0) { 
      return null; 
     } 
     MedicineGroupController controller = (MedicineGroupController) facesContext.getApplication().getELResolver(). 
       getValue(facesContext.getELContext(), null, "medicineGroupController"); 
     return controller.ejbFacade.find(getKey(value)); 
    } 

    java.lang.Long getKey(String value) { 
     java.lang.Long key; 
     key = Long.valueOf(value); 
     return key; 
    } 

    String getStringKey(java.lang.Long value) { 
     StringBuffer sb = new StringBuffer(); 
     sb.append(value); 
     return sb.toString(); 
    } 

    public String getAsString(FacesContext facesContext, UIComponent component, Object object) { 
     if (object == null) { 
      return null; 
     } 
     if (object instanceof MedicineGroup) { 
      MedicineGroup o = (MedicineGroup) object; 
      return getStringKey(o.getId()); 
     } else { 
      throw new IllegalArgumentException("object " + object + " is of type " 
        + object.getClass().getName() + "; expected type: " + MedicineGroupController.class.getName()); 
     } 
    } 
} 

Answer 1

I utilisé des convertisseurs pour chaque selectOneListbox. L'erreur ne s'est pas produite après les mots. Voici un exemple similaire que j'ai utilisé. (Pas exactement le même que ci-dessus code)

Converter initial

@FacesConverter(forClass = Investigation.class) 
public static class InvestigationControllerConverter implements Converter { 

    public InvestigationControllerConverter() { 
    } 

    @Override 
    public Object getAsObject(FacesContext facesContext, UIComponent component, String value) { 
     if (value == null || value.length() == 0) { 
      return null; 
     } 
     InvestigationController controller = (InvestigationController) facesContext.getApplication().getELResolver(). 
       getValue(facesContext.getELContext(), null, "investigationController"); 
     return controller.ejbFacade.find(getKey(value)); 
    } 

    java.lang.Long getKey(String value) { 
     java.lang.Long key; 
     key = Long.valueOf(value); 
     return key; 
    } 

    String getStringKey(java.lang.Long value) { 
     StringBuilder sb = new StringBuilder(); 
     sb.append(value); 
     return sb.toString(); 
    } 

    @Override 
    public String getAsString(FacesContext facesContext, UIComponent component, Object object) { 
     if (object == null) { 
      return null; 
     } 
     if (object instanceof Investigation) { 
      Investigation o = (Investigation) object; 
      return getStringKey(o.getId()); 
     } else { 
      throw new IllegalArgumentException("object " + object + " is of type " 
        + object.getClass().getName() + "; expected type: " + InvestigationController.class.getName()); 
     } 
    } 
} 

plus tard je l'ai changé comme ça.

@FacesConverter("ixcon") 
    public static class InvestigationConverter implements Converter { 

     public InvestigationConverter() { 
     } 



@Override 
    public Object getAsObject(FacesContext facesContext, UIComponent component, String value) { 
     if (value == null || value.length() == 0) { 
      return null; 
     } 
     InvestigationController controller = (InvestigationController) facesContext.getApplication().getELResolver(). 
       getValue(facesContext.getELContext(), null, "investigationController"); 
     return controller.getEjbFacade().find(getKey(value)); 
    } 

    java.lang.Long getKey(String value) { 
     java.lang.Long key; 
     key = Long.valueOf(value); 
     return key; 
    } 

    String getStringKey(java.lang.Long value) { 
     StringBuilder sb = new StringBuilder(); 
     sb.append(value); 
     return sb.toString(); 
    } 

    @Override 
    public String getAsString(FacesContext facesContext, UIComponent component, Object object) { 
     if (object == null) { 
      return null; 
     } 
     if (object instanceof Investigation) { 
      Investigation o = (Investigation) object; 
      return getStringKey(o.getId()); 
     } else { 
      throw new IllegalArgumentException("object " + object + " is of type " 
        + object.getClass().getName() + "; expected type: " + InvestigationController.class.getName()); 
      } 
     } 
    } 

J'ai utilisé ce convertisseur dans les pages JSF comme ceci.

<p:autoComplete converter="ixcon" widgetVar="aIx" id="acIx" forceSelection="true" value="#{investigationItemValueFlagController.investigation}" completeMethod="#{investigationController.completeItem}" var="ix" itemLabel="#{ix.name}" itemValue="#{ix}" size="30" style="width: 400px;"> 
           <p:ajax process="acIx iif" update="iif tbl" event="itemSelect"/> 
          </p:autoComplete>