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http://issues.apache.org/jira/browse/MYFACES-1492?page=comments#action_12449391 
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Martin Marinschek commented on MYFACES-1492:
--------------------------------------------

Hi Mircea,

we're implementing a specification here - we cannot implement the basic 
valueChangeListener differently, the way it works is laid out in the spec. As 
for a reason, look at Mario's last posting and my response to him down below. 

You'll have to go bug the spec-group over on dev.java.net to fix this ugly 
hole, as you want to call it...

@Mario: yes, you can revert the change, by resetting the submitted-value and 
then calling renderResponse.

regards,

Martin

> valueChangeListener is being called before the setters, even with 
> immediate="true"
> ----------------------------------------------------------------------------------
>
>                 Key: MYFACES-1492
>                 URL: http://issues.apache.org/jira/browse/MYFACES-1492
>             Project: MyFaces Core
>          Issue Type: Bug
>          Components: General
>    Affects Versions: 1.1.4
>            Reporter: Mircea Zahan
>         Assigned To: Cagatay Civici
>            Priority: Critical
>             Fix For: 1.1.4
>
>
> valueChangeListener is being called before the setters, even with 
> immediate="true".
> This is not the right behavior since it overwrites any property modified in 
> the event handler.
> <t:panelGrid columns="2" cellpadding="0" cellspacing="5px" 
> columnClasses="left top, left top">
>     <t:outputLabel for="infoId" value="Options"/>
>     <t:selectOneMenu id="infoId" value="#{productBean.infoId}" 
> onchange="submit()" valueChangeListener="#{productBean.valueChangedHandler}" 
> immediate="true">
>         <f:selectItem itemValue="-1" itemLabel="<new short info>"/>
>         <f:selectItems value="#{productBean.shortInfoSelectItems}"/>
>     </t:selectOneMenu>
>     <t:outputLabel for="descText" value="Description"/>
>     <t:inputTextarea id="descText" rows="8" 
> value="#{productBean.description}"/>
>     <t:outputLabel for="utilText" value="Usage"/>
>     <t:inputTextarea id="utilText" styleClass="wXXXL" rows="8" 
> value="#{productBean.usage}"/>
> </t:panelGrid>
> public class ProductBean {
>     private Long infoId;
>     private String description;
>     private String usage;
> //    ....  setters and getters for the above properties
>     public void valueChangedHandler(ValueChangeEvent event) {
>         Long infoId = (Long) event.getNewValue();
>         if ((infoId != null) && (infoId > 0)) {
>             //DataService and ProductInfo are related to Hibernate
>             ProductInfo info = DataService.getProductInfo(infoId);
>             this.description = info.getDescription();
>             this.usage = info.getUsage();
>         }
>     }
> }
> Description and Usage properties can never be changed since they get 
> overwritten with the initial values.
> :(((((((((((((((((((((((((

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