4 Replies Latest reply on Mar 19, 2007 3:57 PM by pmuir

    selectManyListbox and SelectItem error

    jbosskiki
    jbosskiki Mar 19, 2007 11:37 AM

      Hi,
      I'm trying to use two selectManyListBox to assign a list of roles to a user.

      <h:selectManyListbox value="#{rolemanager.source}" converter="#{rolemanager.converter}" size="5">
 <f:selectItems value="#{rolemanager.items}" />
 </h:selectManyListbox>

 <h:commandButton value="add" action="#{rolemanager.add}" />
 <h:commandButton value="remove" action="#{rolemanager.remove}" />

 <h:selectManyListbox value="#{rolemanager.selected}" converter="#{rolemanager.converter}" size="5">
 <f:selectItems value="#{rolemanager.destination}" />
 </h:selectManyListbox>


      when I click on "Add", the list "source" in role manager is a list of Role and not a list of SelectItem, I'd like to know if it's a normal behaviour... I expect to have a List of SelectItem...
      the Complte code is

      RoleManager.java 
      @Stateful
@Scope(SESSION)
@Name("rolemanager")
public class RoleManagerBean implements RoleManager {

 @In(value="agaetisDatabase")
 private EntityManager em;

 @EJB
 private CompanyFacade company;

 private List<Role> roles;

 private List<SelectItem> items;

 private List<SelectItem> source=new ArrayList<SelectItem>();

 private List<SelectItem> destination=new ArrayList<SelectItem>();

 private List<SelectItem> selected=new ArrayList<SelectItem>();

 @Create
 public void loadData() {
 roles = company.findAllRoles(em);

 items=new ArrayList<SelectItem>(roles.size());
 for(Role role : roles)
 items.add(new SelectItem(role, role.getRole()));
 }

 public List<Role> getRoles() {
 return roles;
 }

 public Converter getConverter() {

 return new Converter(){
 public Object getAsObject(FacesContext context, UIComponent component, String value) throws ConverterException {
 if(value==null)
 return null;

 for(Role role : roles)
 if(role.getRole().equals(value))
 return role;
 return null;
 }
 public String getAsString(FacesContext context, UIComponent component, Object value) throws ConverterException {
 return value==null ? null : ((Role)value).getRole();
 }
 };
 }

 public List<SelectItem> getItems() {
 return items;
 }

 public void setItems(List<SelectItem> items) {
 this.items = items;
 }

 public List<SelectItem> getDestination() {
 return destination;
 }

 public void setDestination(List<SelectItem> destination) {
 this.destination=destination;
 }

 public List<SelectItem> getSource() {
 return source;
 }

 public void setSource(List<SelectItem> source) {
 this.source=source;
 }

 public void setSelected(List<SelectItem> selected) {
 this.selected = selected;
 }

 public List<SelectItem> getSelected() {
 return selected;
 }

 public void add() {
 destination.addAll(source);
 source.clear();
 }

 public void remove() {
 source.addAll(destination);
 destination.clear();
 }

 @Destroy
 @Remove
 public void destroy() {
 }

 public void processValueChange(ValueChangeEvent event) throws AbortProcessingException {
 System.out.println(event);
 }
}


      Role.java 
      @Entity
@Table
@Scope(SESSION)
@NamedQueries({@NamedQuery(name = MappedQueries.ROLE_QUERY_FIND_BY_ROLE, query = "select r from Role r where r.role=:role") })
public class Role implements java.io.Serializable {

 private static final long serialVersionUID = 2;

 @Id
 @GeneratedValue(strategy = GenerationType.IDENTITY)
 @Column(precision = 3, scale = 0)
 private short idrole;

 @NotNull
 @Length(max=70)
 @Column(unique = true, nullable = false, length = 70)
 private String role;

 @Length(max=200)
 @Column(length = 200)
 private String description;

 @ManyToMany(mappedBy = "roles")
 private List<User> users;

 public Role() {
 }

 public Role(String role) {
 this.role = role;
 }

 public Role(String role, String description) {
 this(role);
 this.description = description;
 }

 public short getIdrole() {
 return idrole;
 }

 public void setIdrole(short idrole) {
 this.idrole = idrole;
 }

 public String getRole() {
 return role;
 }

 public void setRole(String role) {
 this.role = role;
 }

 public String getDescription() {
 return description;
 }

 public void setDescription(String description) {
 this.description = description;
 }

 public List<User> getUsers() {
 if (users == null)
 users = new Vector<User>(0);
 return users;
 }

 public void setUsers(List<User> users) {
 this.users = users;
 }

 /*
 * (non-Javadoc)
 *
 * @see java.lang.Object#hashCode()
 */
 @Override
 public int hashCode() {
 final int PRIME = 31;
 int result = 1;
 result = PRIME * result + idrole;
 return result;
 }

 /*
 * (non-Javadoc)
 *
 * @see java.lang.Object#equals(java.lang.Object)
 */
 @Override
 public boolean equals(Object obj) {
 if (this == obj)
 return true;
 if (obj == null)
 return false;
 if (getClass() != obj.getClass())
 return false;
 final Role other = (Role) obj;
 if (idrole != other.idrole)
 return false;
 return true;
 }

 @PrePersist
 public void format() {
 role = Formatter.captializeFirstLetter(role);
 }
}


      And the exception... 
      java.lang.IllegalArgumentException: Collection referenced by UISelectItems with binding '#{rolemanager.destination}' and Component-Path : {Component-Path : [Class: org.ajax4jsf.framework.ajax.AjaxViewRoot,ViewId: /credentials.xhtml][Class: javax.faces.component.html.HtmlForm,Id: credentials][Class: javax.faces.component.html.HtmlSelectManyListbox,Id: _id33][Class: javax.faces.component.UISelectItems,Id: _id34]} does not contain Objects of type SelectItem


      Mickael

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