Parameters always return null in JSF [duplicate] - jsf-2

This question already has answers here:
commandButton/commandLink/ajax action/listener method not invoked or input value not set/updated
(12 answers)
Closed 6 years ago.
I am trying to make a login page. I keep the members in different .txt files. But "person", "fileName" and "pageName" variables always return null. I tried everything but can't get it work. Here is my managed bean.
package hw;
import java.io.IOException;
import javax.faces.bean.ManagedBean;
#ManagedBean(name="choose")
public class Choose{
private String person=new String();
private String email;
private String password;
public String pageName,fileName,fileName2;
private boolean ifExists;
FileDatabase fileDatabase = new FileDatabase();
//getters and setters
public String getPerson() {
return person;
}
public void setPerson(String person) {
this.person = person;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
//chooses which file to read to check if the member exists
//according to the selectMenu value and set the returning page name.
//doesnt enter any of the if blocks.
public String chooseFile() {
if(person.equals("1")){
fileName="admins.txt";
pageName="admin-page";
}
else if(person.equals("2")){
fileName="instructors.txt";
pageName="instructor-page";
}
else if(person.equals("3")){
fileName="assistants.txt";
pageName="assistant-page";
}
else if(person.equals("4")){
fileName="students.txt";
pageName="student-page";
System.out.println("Filename:"+fileName);
System.out.println("Pagename:"+pageName);
}
return fileName;
}
//gets the fileName and checks the member but fileName is always null,
//person and pageName as well.
public String login() throws IOException {
fileName2=chooseFile();
System.out.println("Person:"+person);
System.out.println("Filename2:"+fileName2);
System.out.println("Pagename:"+pageName);
ifExists = fileDatabase.ifExistsMember(fileName2, email, password);
if(ifExists)
return(pageName);
else
return("index");
}
public String register() throws IOException{
return("index");
}
}
Here is the body part of the index.xhtml:
<h:body>
<h1 class="title">Welcome!</h1>
<fieldset>
<h:form>
<h3>Which one are you?</h3>
<h:selectOneMenu value="#{choose.person}">
<f:selectItem itemValue="1" itemLabel="Admin" />
<f:selectItem itemValue="2" itemLabel="Instructor" />
<f:selectItem itemValue="3" itemLabel="Assistant" />
<f:selectItem itemValue="4" itemLabel="Student" />
</h:selectOneMenu>
</h:form>
</fieldset>
<fieldset>
<h:form>
Email<br/><h:inputText value="#{choose.email}"/><br/>
Password<br/><h:inputSecret value="#{choose.password}"/><br/><br/>
<h:commandButton value="Login" action="#{choose.login}" />
<h:commandButton value="Register" action="#{choose.register}" />
</h:form>
</fieldset>
</h:body>

Your problem is easy to solve.
Just move your <h:selectOneMenu> to the other form
<h:body>
<h1 class="title">Welcome!</h1>
<h:form>
<fieldset>
<h3>Which one are you?</h3>
<h:selectOneMenu value="#{choose.person}">
<f:selectItem itemValue="1" itemLabel="Admin" />
<f:selectItem itemValue="2" itemLabel="Instructor" />
<f:selectItem itemValue="3" itemLabel="Assistant" />
<f:selectItem itemValue="4" itemLabel="Student" />
</h:selectOneMenu>
</fieldset>
<fieldset>
Email<br/><h:inputText value="#{choose.email}"/><br/>
Password<br/><h:inputSecret value="#{choose.password}"/><br/><br/>
<h:commandButton value="Login" action="#{choose.login}" />
<h:commandButton value="Register" action="#{choose.register}" />
</fieldset>
</h:form>
</h:body>

Related

Getting null values from jsf inputText in Manage bean

I am facing weird issue in jsf inputText. On browser it is showing the manage bean name and the variable name in input box (i.e. #{loginModel.userName}). the following is my jsf page code
<body>
<f:view>
<h:form>
<h:outputLabel value="Username"></h:outputLabel>
<h:inputText value="#{loginModel.userName}"></h:inputText>
<h:outputLabel value="Password"></h:outputLabel>
<h:inputSecret value="#{loginModel.password}"></h:inputSecret>
<h:commandButton value="Submit" action="#{loginModel.process}" ></h:commandButton>
</h:form>
</f:view>
</body>
My manage bean code is
public class LoginModel {
private String userName;
private String password;
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public String process(){
System.out.println("Logged in user id is "+this.getUserName()+" and password to access is "+this.getPassword());
return "Submit";
}
}
and my faces-config.xml file
<managed-bean>
<managed-bean-name>loginModel</managed-bean-name>
<managed-bean-class>net.varun.dto.LoginModel</managed-bean-class>
<managed-bean-scope>session</managed-bean-scope>
</managed-bean>
and following is my output on browser as well as i am getting null when i click on submit button
try the following code:
Change your h:commandButton for the primefaces process, partialSubmit and ajax
<body>
<f:view>
<h:form>
<h:outputLabel value="Username"></h:outputLabel>
<h:inputText value="#{loginModel.userName}"></h:inputText>
<h:outputLabel value="Password"></h:outputLabel>
<h:inputSecret value="#{loginModel.password}"></h:inputSecret>
<p:commandButton value="Submit" action="#{loginModel.process}" process="#form" partialSubmit="true" ajax="true" />
</h:form>
</f:view>
</body>
So you can put a breakpoint in your process method for see the update values.

Load value from database to <h:inputText> with <h:selectOneMenu> valueChangeEvent

I want to develop a JSF Page which lets user edit a Employee from database. I loaded list of all employees in h:selectOneMenu. and second thing i want that with valueChangeEvent employee detail should be loaded in corresponding h:inputText. but nothing happens with every valueChangeEvent. So, where is the problem in codes.
<?xml version='1.0' encoding='UTF-8' ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://xmlns.jcp.org/jsf/html"
xmlns:f="http://xmlns.jcp.org/jsf/core">
<h:head>
<title>Facelet Title</title>
</h:head>
<h:body>
<div id="hdr">
<h1>Vinweb Services</h1>
<hr/>
</div>
;
<div id="mnu" style="height: 50px; width: auto; background: skyblue;">
<h:form>
<h:commandLink value="Home" action="index"/>
<h:outputText value=" "/>
<h:commandLink value="Create" action="create"/>
<h:outputText value=" "/>
<h:commandLink value="View" action="view"/>
<h:outputText value=" "/>
<h:commandLink value="Edit" action="edit"/>
</h:form>
</div>
<div id="cnt">
<h:form>
<h:panelGrid columns="2">
<h:outputLabel value="Select an Employee"/>
<h:selectOneMenu value="#{esb.empName}" onchange="submit()" valueChangeListener="#{esb.loadEmployeeDetail}">
<f:selectItems value="#{esb.employeeList}"/>
</h:selectOneMenu>
<h:outputLabel value="Employee Code"/>
<h:inputText value="#{esb.empCode}" required="true"/>
<h:outputLabel value="Employee Name"/>
<h:inputText value="#{esb.empName}" required="true"/>
<h:outputLabel value="Joining Date"/>
<h:inputText value="#{esb.joinDate}" required="true">
<f:convertDateTime pattern="MM/yy"/>
</h:inputText>
<h:outputLabel value="Salary"/>
<h:inputText value="#{esb.salary}" required="true"/>
<h:commandButton value="Update" action="#{esb.updateEmployeeDetail}"/>
</h:panelGrid>
</h:form>
</div>
</h:body>
</html>
Backing Bean:
package ems.bean;
import javax.inject.Named;
import javax.enterprise.context.SessionScoped;
import java.io.Serializable;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.Date;
import javax.annotation.Resource;
import javax.faces.event.ValueChangeEvent;
import javax.sql.DataSource;
#Named(value = "esb")
#SessionScoped
public class EmployeeServiceBean implements Serializable {
#Resource(name = "JPA4A")
private DataSource ds;
// Member Declaration
private String empCode;
private String empName;
private Date joinDate;
private long salary;
private ArrayList empList;
// Service Code Segment
// This method will publish all emloyees in table to selectOneMenu
public ArrayList getEmployeeList() throws SQLException{
empList = new ArrayList();
Connection con = ds.getConnection();
try{
Statement stmt = con.createStatement();
ResultSet rslt = stmt.executeQuery("SELECT empName FROM Employee");
while(rslt.next()){
empList.add(rslt.getString("empName"));
}
}
catch(SQLException se) {
throw new SQLException();
}
finally{
con.close();
}
return empList;
}
// This method should load selected empoyee's details in inputText fields
public void loadEmployeeDetail(ValueChangeEvent evt) throws SQLException{
String emp = evt.getNewValue().toString();
Connection con = ds.getConnection();
try{
Statement stmt = con.createStatement();
String qry = "SELECT * FROM Employee WHERE empName = '"+emp+"'";
ResultSet rslt = stmt.executeQuery(qry);
rslt.next();
this.empCode = rslt.getString("empCode");
this.empName = rslt.getString("empName");
this.joinDate = rslt.getDate("joinDate");
this.salary = rslt.getLong("salary");
}
catch(SQLException se) {
se.printStackTrace();
}
finally{
con.close();
}
}
public void updateEmployeeDetail() throws SQLException{
Connection con = ds.getConnection();
try{
Statement stmt = con.createStatement();
boolean rs = stmt.execute("UPDATE Employee SET empCode='"+empCode+"', empName='"+empName+"', joinDate='"+joinDate+"', salary="+salary);
}
catch(SQLException se) {
throw new SQLException();
}
finally{
con.close();
}
}
// Property Getter & Setter code segment
public String getEmpCode() {
return empCode;
}
public void setEmpCode(String empCode) {
this.empCode = empCode;
}
public String getEmpName() {
return empName;
}
public void setEmpName(String empName) {
this.empName = empName;
}
public Date getJoinDate() {
return joinDate;
}
public void setJoinDate(Date joinDate) {
this.joinDate = joinDate;
}
public long getSalary() {
return salary;
}
public void setSalary(long salary) {
this.salary = salary;
}
}
The valueChangeListener is the wrong tool for the job.
You're here doing a onchange="submit()" which submits the entire form, including those required fields which in turn caused validation errors which in turn failed to reach your attention because you don't have any <h:message(s)> for them. If you have placed a <h:messages/> inside the form, or have paid more love and attention to server logs, you should have been notified of those required="true" validation errors.
You need <f:ajax listener>.
Replace
<h:selectOneMenu value="#{esb.empName}" onchange="submit()" valueChangeListener="#{esb.loadEmployeeDetail}">
<f:selectItems value="#{esb.employeeList}"/>
</h:selectOneMenu>
by
<h:selectOneMenu value="#{esb.empName}">
<f:selectItems value="#{esb.employeeList}"/>
<f:ajax listener="#{esb.loadEmployeeDetail}" render="#form" />
</h:selectOneMenu>
and replace
public void loadEmployeeDetail(ValueChangeEvent evt) throws SQLException{
String emp = evt.getNewValue().toString();
// ...
}
by
public void loadEmployeeDetail() throws SQLException{
String emp = empName; // You can also just use `empName` directly.
// ...
}
See also:
When to use valueChangeListener or f:ajax listener?

selectOneMenu validation error

I implemented code that allows me to display a dropdown which depends on another. Everything works fine except when I try to retrieve and display the value of the two fields, it raises the following error:
form:parcours : erreur : de validation. la valeur est incrorrecte
in english :
form:parcours : validation error. value is not valid
I am using JSF 2.0, EJB 3.0, JPA 2.0 and PrimeFaces 3.2.
View:
<h:form id="form" >
<!-- <p:growl id="msgs" showDetail="true"/> -->
<h:messages globalOnly="true"/>
<p:growl id="msgs" showDetail="true" />
<p:panel header="Double Combo" style="margin-bottom:10px;">
<h:panelGrid columns="2" cellpadding="5">
<p:selectOneMenu id="countries" value="#{plansEtude.selectedDep}">
<f:selectItem itemLabel="Select Country" itemValue="" />
<f:selectItems value="#{plansEtude.depList}" var="c" itemLabel="#{c.nomDepFr}" itemValue="#{c.id}"/>
<p:ajax update="parcours,parcoursTab"
listener="#{plansEtude.handleDepChange}" />
</p:selectOneMenu>
<p:selectOneMenu id="parcours" value="#{plansEtude.selectedParcours}" >
<f:convertNumber maxFractionDigits="0"/>
<f:selectItem itemLabel="Select City" itemValue="" />
<f:selectItems value="#{plansEtude.parcoursList}" var="ct" itemLabel="#{ct.designParcours}" itemValue="#{ct.id}" />
</p:selectOneMenu>
</h:panelGrid>
<p:separator />
<p:commandButton value="Submit" update="msgs" actionListener="#{plansEtude.displayLocation}" id="btnSubmit"/>
</p:panel>
Controller :
#EJB
private DepartementFacade departementFacade;
#EJB
private ParcoursFacade parcoursFacade;
private List<Departement> depList;
private List<Parcours> parcoursList;
private Integer selectedDep;
private Integer selectedParcours;
public PlansEtude() {
}
public DepartementFacade getDepartementFacade() {
return departementFacade;
}
public void setDepartementFacade(DepartementFacade departementFacade) {
this.departementFacade = departementFacade;
}
public ParcoursFacade getParcoursFacade() {
return parcoursFacade;
}
public void setParcoursFacade(ParcoursFacade parcoursFacade) {
this.parcoursFacade = parcoursFacade;
}
public List<Departement> getDepList() {
depList = getDepartementFacade().findAll();
return depList;
}
public void setDepList(List<Departement> depList) {
this.depList = depList;
}
public List<Parcours> getParcoursList() {
return parcoursList;
}
public void setParcoursList(List<Parcours> parcoursList) {
this.parcoursList = parcoursList;
}
public Integer getSelectedDep() {
return selectedDep;
}
public void setSelectedDep(Integer selectedDep) {
this.selectedDep = selectedDep;
}
public Integer getSelectedParcours() {
return selectedParcours;
}
public void setSelectedParcours(Integer selectedParcours) {
this.selectedParcours = selectedParcours;
}
public void handleDepChange(){
if(selectedDep !=null && !selectedDep.equals(""))
parcoursList = parcoursFacade.findParcoursInDep(selectedDep);
else
parcoursList = new ArrayList<Parcours>();
}
public void handleParcoursChange(){
}
public void displayLocation() {
String monMessage="Departement :" + selectedDep + ", Parcours : " + selectedParcours;
FacesMessage msg = new FacesMessage("Selected", monMessage);
FacesContext.getCurrentInstance().addMessage(null, msg);
}
}
parcoursFacade :
public List<Parcours> findParcoursInDep(Integer dep){
Query query = em.createNamedQuery("Parcours.findParcoursInDep");
query.setParameter("dep", dep);
return (List<Parcours>)query.getResultList();
}
Named query :
#NamedQuery(name = "Parcours.findParcoursInDep", query = "SELECT p FROM Parcours p WHERE p.departementid.id = :dep"),
Remove the <f:convertNumber maxFractionDigits="0"/> from your parcours dropdown. It makes no sense. It would only convert the number to BigDecimal while you need an Integer.
Another possible cause is that the #{plansEtude.parcoursList} has incompatibly changed during the form submit because the managed bean is request scoped. You need to make sure that the managed bean is placed in at least the view scope, so that the parcoursList is preserved for the submit.

valueChangeListener is not getting called from <h:selectOneRadio> which is placed in side a <h:panelGrid>

I am facing an issue with h:selectOneRadio's valueChangeListener="#{user.loadYesNo}"
(I use Mojarra 2-0-8 on Tomcat-7) .
If I remove both the panelGrid enclosing the 'h:selectOneRadio', then the value change litener is getting fired.
View:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core">
<h:head><title> Starting JSF</title></h:head>
<h:body>
<h:form>
<h:panelGrid column="2">
<h:outputLabel>User Name</h:outputLabel>
<h:inputText id="loginName" value="#{user.userName}"></h:inputText>
<h:outputLabel>Password</h:outputLabel>
<h:inputSecret id="loginPassword" value="#{user.password}"></h:inputSecret>
</h:panelGrid>
<h:commandButton value="Submit" action ="#{user.validateLogin}">
<f:ajax execute="#form" render="yesNoRadioGrid message"></f:ajax>
</h:commandButton>
<h:panelGrid>
<h:outputText id ="message" value="#{user.message}"></h:outputText>
</h:panelGrid>
<h:panelGrid id="yesNoRadioGrid">
<h:panelGrid columns="2" rendered="#{user.yesNoRadioGridFlag}">
<h:outputText id ="otherLbl" value="Select Yes or No"></h:outputText>
<h:selectOneRadio id="yesNoRadio" value ="#{user.yesNoRadio}" valueChangeListener="#{user.loadYesNo}">
<f:selectItem itemValue="1" itemLabel="YES"></f:selectItem>
<f:selectItem itemValue="0" itemLabel="NO"></f:selectItem>
<f:ajax event="change" execute="#form" render="userDetailsGrid "></f:ajax>
</h:selectOneRadio>
</h:panelGrid>
</h:panelGrid>
<h:message for ="yesNoRadio"> </h:message>
<h:panelGrid id="userDetailsGrid">
<h:panelGrid columns="2" rendered="#{user.userDetailsGridFlag}">
<h:outputLabel>Name :</h:outputLabel>
<h:inputText id="customerName" value="#{user.customerName}"></h:inputText>
<h:outputLabel>Salary: </h:outputLabel>
<h:inputText id="customerSalary" value="#{user.customerSalary}"></h:inputText>
</h:panelGrid>
</h:panelGrid>
</h:form>
</h:body>
</html>
Model+Controller mingled:
package com.jsf.test;
import javax.faces.bean.*;
import javax.faces.event.ValueChangeEvent;
#ManagedBean
public class User {
private String userName;
private String password;
private String message;
private String customerName;
private String customerSalary;
private Integer yesNoRadio;
private Boolean yesNoRadioGridFlag;
private Boolean userDetailsGridFlag;
public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message;
}
public String getCustomerName() {
return customerName;
}
public void setCustomerName(String customerName) {
this.customerName = customerName;
}
public String getCustomerSalary() {
return customerSalary;
}
public void setCustomerSalary(String customerSalary) {
this.customerSalary = customerSalary;
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public Integer getYesNoRadio() {
return yesNoRadio;
}
public void setYesNoRadio(Integer yesNoRadio) {
this.yesNoRadio = yesNoRadio;
}
public Boolean getUserDetailsGridFlag() {
return userDetailsGridFlag;
}
public void setUserDetailsGridFlag(Boolean userDetailsGridFlag) {
this.userDetailsGridFlag = userDetailsGridFlag;
}
public Boolean getYesNoRadioGridFlag() {
return yesNoRadioGridFlag;
}
public void setYesNoRadioGridFlag(Boolean yesNoRadioGridFlag) {
this.yesNoRadioGridFlag = yesNoRadioGridFlag;
}
public String validateLogin() {
if (userName.equals("xyz") && password.equals("xyz")) {
message = "Login Success";
yesNoRadioGridFlag = true;
} else {
yesNoRadioGridFlag = false;
message = "Login Failure";
}
return message;
}
public void loadYesNo(ValueChangeEvent evt){
Integer yesNoValue = (Integer)evt.getNewValue();
setYesNoRadio(yesNoValue);
userDetailsGridFlag = true;
}
}
You need to put the bean in the view scope in order to retain the underlying condition of the rendered attribute for the subsequent requests.
#ManagedBean
#ViewScoped
public class User {
// ...
}
Unrelated to the concrete problem, the valueChangeListener is intended to be used whenever you want to have a hook on the server side value change event which allows you to have both the old value and the new value at your hands. For example, to log an event. It's not intended to perform business actions based on the change. For that you should be using the listener attribute of <f:ajax> instead.
So, replace
<h:selectOneRadio id="yesNoRadio" value ="#{user.yesNoRadio}" valueChangeListener="#{user.loadYesNo}">
<f:selectItem itemValue="1" itemLabel="YES"></f:selectItem>
<f:selectItem itemValue="0" itemLabel="NO"></f:selectItem>
<f:ajax event="change" execute="#form" render="userDetailsGrid "></f:ajax>
</h:selectOneRadio>
with
<h:selectOneRadio id="yesNoRadio" value ="#{user.yesNoRadio}">
<f:selectItem itemValue="1" itemLabel="YES"></f:selectItem>
<f:selectItem itemValue="0" itemLabel="NO"></f:selectItem>
<f:ajax execute="#form" listener="#{user.loadYesNo}" render="userDetailsGrid"></f:ajax>
</h:selectOneRadio>
and remove the ValueChangeEvent attribute from the method.

How to pass attributes to a composite-component

I am having trouble in using a JSF composite-component in the right way. I put some components together and everything was working. Then I just extracted the code to a composite-component, and passed the corresponding attributes and suddenly I am getting conversation exceptions.
<composite:interface>
<composite:attribute name="selectedIDs" type="java.util.Collection" required="true"/>
<composite:attribute name="selectItems" type="java.util.List" required="true" />
<composite:attribute name="addAction" required="true"/>
<composite:attribute name="deleteAction" required="true"/>
<composite:attribute name="deleteButtonDisabled" />
<composite:attribute name="ajaxListener" method-signature="void listener(javax.faces.event.AjaxBehaviorEvent)"/>
</composite:interface>
<composite:implementation>
<div class="myClass">
<h:outputStylesheet library="views" name="selectManyControlPanel.css" target="head" />
<h:form>
<h:selectManyListbox value="#{cc.attrs.selectedIDs}">
<f:selectItems value="#{cc.attrs.selectItems}" />
<f:ajax render="delete"
listener="#{cc.attrs.ajaxListener}" />
</h:selectManyListbox>
<br />
<h:commandButton id="delete" value="Delete"
disabled="#{cc.attrs.deleteButtonDisabled}"
action="#{cc.attrs.deleteAction}" />
<h:commandButton id="add" value="Add" action="#{cc.attrs.addAction}"/>
</h:form>
</div>
</composite:implementation>
Here is the page where I am using the newly created component
<view:selectManyControlPanel
selectedIDs="#{bean.selectedIds}"
selectItems="#{bean.listOfSelectItems}"
addAction="#{bean.addNew}"
deleteAction="#{bean.deleteSelection}"
ajaxListener="#{bean.selectionChanged}"
deleteButtonDisabled="#{bean.deleteButtonDisabled}" />
Bean (some methods skipped an parts renamed)
package views;
#SuppressWarnings("serial")
#Named
#RequestScoped
public class Bean implements Serializable, IOverviewView {
#Inject
Presenter presenter;
private boolean deleteButtonDisabled;
private List<SelectItem> listOfSelectItems;
private Set<Long> selectedIds;
public Bean(){
deleteButtonDisabled = true;
listOfSelectItems = new ArrayList<SelectItem>(10);
}
public void selectionChanged(AjaxBehaviorEvent event){
if(selectedIds.isEmpty())
deleteButtonDisabled = true;
else
deleteButtonDisabled = false;
}
public void deleteBikes(){
presenter.delete(selectedIds);
}
public void addNew(){
presenter.addNew();
}
public List<SelectItem> getListOfSelectItems() {
return listOfSelectItems;
}
public Set<Long> getSelectedIds() {
return selectedIds;
}
#PostConstruct
public void init(){
System.out.println("INITIALIZING BEAN: " + this.getClass().getName());
this.presenter.setView(this);
this.presenter.init();
}
public boolean isDeleteButtonDisabled() {
return deleteButtonDisabled;
}
#Override
public void setDeleteButtonEnabled(boolean isEnabled) {
deleteButtonDisabled = !isEnabled;
}
public void setListOfSelectItems(List<SelectItem> list) {
this.listOfSelectItems = list;
}
public void setSelectedIds(Set<Long> selectedIds) {
this.selectedIds = selectedIds;
}
#Override
public void updateBikesList(Set<ViewObject> objectsToDisplay) {
updateList(objectsToDisplay);
}
private void updateList(Set<ViewObject> objectsToDisplay){
listOfSelectItems.clear();
for (ViewObject vO : objectsToDisplay) {
final String label = vO.getManufacturer() + ", " + vO.getModel() + " (" + vO.getYear() + ")";
listOfSelectItems.add(new SelectItem(vO.getId(), label));
}
}
....
}
Exception
javax.el.ELException: /resources/views/selectManyControlPanel.xhtml #25,56 value="#{cc.attrs.selectedIDs}": /index.xhtml #21,70 selectedIDs="#{bean.selectedIds}": Cannot convert [Ljava.lang.String;#1e92093 of type class [Ljava.lang.String; to interface java.util.Set
The only thing that changed is that I am using the composition instead of the plain code. The EL-expressions are still the same. Can someone enlighten me please? I expected that the parameters are just passed through but obviously not...
This is related to Mojarra issue 2047. It's scheduled to be fixed in the upcoming 2.2.
The issue ticket also proposes the following workaround:
<view:selectManyControlPanel
selectedIDsBean="#{bean}"
selectedIDsProperty="selectedIds"
with in CC interface
<composite:attribute name="selectedIDsBean" required="true"/>
<composite:attribute name="selectedIDsProperty" required="true"/>
and in CC implementation
<h:selectManyListbox value="#{cc.attrs.selectedIDsBean[cc.attrs.selectedIDsProperty]}">

Resources