How to reset an error from view or backing bean?

Question

The JSF view shown below sets attributes 'required' and 'disabled' of an
h:inputText depending on the input value on a h:selectBooleanCheckbox.
It mostly works but a serious problem is that when the user enables the
h:inputText and pushes the submit button with blank input, message
"Validation Error: Value is required." is displayed. The error message
is quite natural but the core of the problem is that at this state,
changing the checkbox value to false(==unchecked) doesn't cause the
reset of error and disabling/non-requiring of the textfield. Checkbox
becomes unchecked by user mouse operation but textfield remains enabled.
How could I have the textfield disabled and non-required when the user
did some non-standard(?) operation described above?
[VIEW]
<f:view>
<h:form id="mform">
<h:selectBooleanCheckbox id="mflag" immediate="true"
                         value="#{mailBean.mailFlag}"
                         onchange="this.form.submit();" >
<h:outputText value="I'll send my mail address" />
</h:selectBooleanCheckbox>
<br>
<h:outputLabel for="mailtext" value="mlabel">
Enter Your Mail Address:</h:outputLabel>
<h:inputText id="mailtext"
             required="#{mailBean.mailFlag}"
             immediate="#{! mailBean.mailFlag}"
             disabled="#{! mailBean.mailFlag}"
             value="#{mailBean.mailText}"/>
<h:message for="mailtext"/>
<br>
<h:commandButton id="msubmit" value="submit" action="success"/>
</h:form>
</f:view>
[BEAN]...scope of the managed bean mailBean is session...
public class MailBean{
  private boolean mailFlag = false;
  private String mailText;
  public void setMailFlag(boolean flag) {
    mailFlag = flag;
    if (! flag){
      mailText = "";
  public void setMailText(String str) {
    mailText = str;
  public boolean getMailFlag() {
    return mailFlag;
  public String getMailText() {
    if (! mailFlag) {mailText = "";}
    return mailText;
}

Answer 1

The JSF view shown below sets attributes 'required'
and 'disabled' of an
h:inputText depending on the input value on a
h:selectBooleanCheckbox.
It mostly works but a serious problem is that when
the user enables the
h:inputText and pushes the submit button with blank
input, message
"Validation Error: Value is required." is displayed.
The error message
is quite natural but the core of the problem is that
at this state,
changing the checkbox value to false(==unchecked)
doesn't cause the
reset of error and disabling/non-requiring of the
textfield. Checkbox
becomes unchecked by user mouse operation but
textfield remains enabled.Have you tried setting the immediate property to true for the checkbox, and not using it for the inputText component? It looks to me like that's the one you want to run first, before validation is performed.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Kito D. Mann ([email protected])
Principal Consultant, Virtua, Inc. (http://www.virtua.com)
Author, JavaServer Faces in Action
http://www.JSFCentral.com - JavaServer Faces FAQ, news, and info
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