How to reset input components on change of <p:selectOneMenu> after certain validations are violated

Question

I'm populating <p:selectOneMenu> from a database which contains a list of zones, when a JSF page loaded.

When a zone in this menu is selected, a set of <p:inputText> is displayed in which a user can insert charge that corresponds to product weight which is to be transferred by a transporter to the selected zone in the menu. This can be shown in the following snap shot.

As can be seen, when non numeric values are entered by a user, validation violations occurs, when the given save button <p:commandButton> is pressed (the numbers displayed on top of each text field correspond to weight).

If a user now change the zone in the menu - the first panel without pressing the reset button, the data corresponds to that newly selected zone is loaded in these text fields only when the reset button is pressed as follows (because of validation violation)..

So, how to load data after previous validation violation, if an item (zone) is changed in the menu?

The change event of <p:selectOneMenu>, in this case should do the function something like which is done by <p:resetInput>.

Hope you will be able to understand what I mean :).

Answer 1

Basically, you need the functionality provided by <p:resetInput> inside <p:ajax> of a <p:selectOneMenu>. This is indeed not possible as <p:resetInput> requires being placed in a component implementing ActionSource such as UICommand components.

Your best bet is to let <p:remoteCommand> take over the <p:ajax> change listener job. Therein you can put a <p:resetInput>.

Imagine that you currently have a:

<h:form>
    <p:selectOneMenu id="zone">
        <f:selectItems ... />
        <p:ajax listener="#{bean.changeZone}" update="data" />
    </p:selectOneMenu>

    <p:panel id="data">
        ...
    </p:panel>
</h:form>

Then this change should do:

<h:form>
    <p:selectOneMenu id="zone" onchange="changeZone()">
        <f:selectItems ... />
    </p:selectOneMenu>
    <p:remoteCommand name="changeZone" process="@this zone" action="#{bean.changeZone}" update="data">
        <p:resetInput target="data" />
    </p:remoteCommand>  

    <p:panel id="data">
        ...
    </p:panel>
</h:form>

Don't forget to remove the AjaxBehaviorEvent argument from the listener method. It's useless in this particular case anyway.