[Solved] Nested setActionListener not working correctly.

Question

Hi,
I'm having a situation where I have to load some xml and display the values on the screen. The results can be filtered by selecting a value in a selectOneChoice component. Please consider the example below, which is a reproducible scenario, just to show the 'wrong' (?) behavior.
The ValueChange bean initialize some lists and handles the selection change of the selectOneChoice component on the .jspx page. The onValueChange method will 'filter' the data everytime a selection change. The filterItems method will clear the personItems list and add a new object to the list, depending on the selected value:
public class ValueChange {
    private List someSelectItems;
    private String selectedValue;
    private List personItems;
    private Person person1 = new Person("1", "Larry", "Ellison");
    private Person person2 = new Person("2", "Bill", "Gates");
    private Person person3 = new Person("3", "Steve", "Jobs");
    public ValueChange() {
     System.out.println(this.getClass() + " Init");
     this.someSelectItems = new ArrayList();
     someSelectItems.add(new SelectItem("1", "Oracle"));
     someSelectItems.add(new SelectItem("2", "MicroSoft"));
     someSelectItems.add(new SelectItem("3", "Apple"));
     this.personItems = new ArrayList();
     this.personItems.add(person1);
    public List getSomeSelectItems() {
     // Fill this list.
     return someSelectItems;
    public void onValueChange(ValueChangeEvent valueChangeEvent) {
     System.out.println("Current Class: ValueChange - Current Method: onDocumentLanguageValueChange");
     if (valueChangeEvent != null) {
         String vValue = valueChangeEvent.getNewValue().toString();
         filterItems(vValue);
    public void setSelectedValue(String selectedValue) {
     this.selectedValue = selectedValue;
    public String getSelectedValue() {
     return selectedValue;
    private void filterItems(String pValue) {
     this.personItems.clear();
     if (pValue.equals("1")) {
         this.personItems.add(person1);
     } else if (pValue.equals("2")) {
         this.personItems.add(person2);
     } else if (pValue.equals("3")) {
         this.personItems.add(person3);
    public void setPersonItems(List personItems) {
     this.personItems = personItems;
    public List getPersonItems() {
     return personItems;
}The person class is just a simple bean containing some attributes + getters and setters:
public class Person {
    private String id;
    private String firstname;
    private String lastname;
    public Person(String pId, String pFirstname, String pLastname) {
     this.id = pId;
     this.firstname = pFirstname;
     this.lastname = pLastname;
    public void setId(String id) {
     this.id = id;
    public String getId() {
     return id;
    public void setFirstname(String firstname) {
     this.firstname = firstname;
    public String getFirstname() {
     return firstname;
    public void setLastname(String lastname) {
     this.lastname = lastname;
    public String getLastname() {
     return lastname;
}On the start page of the example, the selectOneChoice will be rendered + the data matching to the selected item. I'm using a commandLink to open a detail page. The commandLink contains a nested af:setActionListener which should set the whole current person instance to a sessionScope variable. (But his seems to fail.]
<?xml version='1.0' encoding='windows-1252'?>
<jsp:root xmlns:jsp="http://java.sun.com/JSP/Page" version="2.0"
          xmlns:h="http://java.sun.com/jsf/html"
          xmlns:f="http://java.sun.com/jsf/core"
          xmlns:af="http://xmlns.oracle.com/adf/faces"
          xmlns:afh="http://xmlns.oracle.com/adf/faces/html">
  <jsp:output omit-xml-declaration="true" doctype-root-element="HTML"
              doctype-system="http://www.w3.org/TR/html4/loose.dtd"
              doctype-public="-//W3C//DTD HTML 4.01 Transitional//EN"/>
  <jsp:directive.page contentType="text/html;charset=windows-1252"/>
  <f:view>
    <afh:html>
      <afh:head title="myPage">
        <meta http-equiv="Content-Type"
              content="text/html; charset=windows-1252"/>
      </afh:head>
      <afh:body>
        <h:form id="myPageForm">
          <h:panelGrid>
            <af:selectOneChoice id="selectValue" autoSubmit="true" value="1"
                                valueChangeListener="#{valueChange.onValueChange}">
              <f:selectItems value="#{valueChange.someSelectItems}"/>
            </af:selectOneChoice>
            <af:panelList partialTriggers="selectValue">
              <af:forEach items="#{valueChange.personItems}" var="person">
                <af:commandLink text="#{person.firstname} (#{person.id})"
                                action="showdetail">
                  <af:setActionListener from="#{person}"
                                        to="#{sessionScope.person}"/>
                </af:commandLink>
              </af:forEach>
            </af:panelList>
          </h:panelGrid>
        </h:form>
      </afh:body>
    </afh:html>
  </f:view>
</jsp:root>The detail page should just read the firstname of the person instance on sessionScope, but it always shows the same name.
<?xml version='1.0' encoding='windows-1252'?>
<jsp:root xmlns:jsp="http://java.sun.com/JSP/Page" version="2.0"
          xmlns:h="http://java.sun.com/jsf/html"
          xmlns:f="http://java.sun.com/jsf/core"
          xmlns:af="http://xmlns.oracle.com/adf/faces"
          xmlns:afh="http://xmlns.oracle.com/adf/faces/html">
  <jsp:output omit-xml-declaration="true" doctype-root-element="HTML"
              doctype-system="http://www.w3.org/TR/html4/loose.dtd"
              doctype-public="-//W3C//DTD HTML 4.01 Transitional//EN"/>
  <jsp:directive.page contentType="text/html;charset=windows-1252"/>
  <f:view>
    <afh:html>
      <afh:head title="myDetailPage">
        <meta http-equiv="Content-Type"
              content="text/html; charset=windows-1252"/>
      </afh:head>
      <afh:body>
        <h:form>
          <af:panelForm maxColumns="1">
            <af:outputText value="#{sessionScope.person.firstname}"/>
            <af:commandLink text="Back" action="back"/>
          </af:panelForm>
        </h:form>
      </afh:body>
    </afh:html>
  </f:view>
</jsp:root>
<?xml version="1.0" encoding="windows-1252"?>
<!DOCTYPE faces-config PUBLIC
  "-//Sun Microsystems, Inc.//DTD JavaServer Faces Config 1.1//EN"
  "http://java.sun.com/dtd/web-facesconfig_1_1.dtd">
<faces-config xmlns="http://java.sun.com/JSF/Configuration">
  <managed-bean>
    <managed-bean-name>valueChange</managed-bean-name>
    <managed-bean-class>be.contribute.valuechange.view.beans.ValueChange</managed-bean-class>
    <managed-bean-scope>request</managed-bean-scope>
  </managed-bean>
  <application>
    <default-render-kit-id>oracle.adf.core</default-render-kit-id>
  </application>
  <navigation-rule>
    <from-view-id>/myPage.jspx</from-view-id>
    <navigation-case>
      <from-outcome>showdetail</from-outcome>
      <to-view-id>/myDetailPage.jspx</to-view-id>
    </navigation-case>
  </navigation-rule>
  <navigation-rule>
    <from-view-id>/myDetailPage.jspx</from-view-id>
    <navigation-case>
      <from-outcome>back</from-outcome>
      <to-view-id>/myPage.jspx</to-view-id>
    </navigation-case>
  </navigation-rule>
</faces-config>I can always send this sample application by mail, just drop a reply or send me a message (koen [dot] verhulst [at] contribute [dot] be )
JDeveloper 10.1.3.3
Thanks in advance,
Koen Verhulst

Answer 1

It seems that it has something to do with the fact that I set the value of the selectOneChoice to 1.
<af:selectOneChoice id="selectValue" autoSubmit="true" value="1"
                                valueChangeListener="#{valueChange.onValueChange}">
              <f:selectItems value="#{valueChange.someSelectItems}"/>
</af:selectOneChoice>I modified the value attribute to:
value="#{valueChange.selectedValue}"Where selectedValue is an attribute in my ValueChange class, containing a default value. Getters and setters are also generated.
private String selectedValue = "1"When I run the application again, after making these changes, I'm able to pass the correct data to the detail page. But: as soons as I select the 'default value' in the selectOneChoice, no valueChange is detected and thus my data does not gets filtered.
Since the valueChange instance is a request-scoped bean, a value change is not detected because the current value equals the default value (question: am I right here?).
Setting the bean to session scope let the example fully works.
Although it works, I think it should be better to let the bean on request scope and stored a 'selected' value attribute on the sessionScope.
Thanks,
Koen Verhulst