I have a primefaces wizard which contain a simple form and a datatable. On clicking save, the record is displayed in the datatable which is just below the form. Now for the user to move on the next tab, he should at least enter a record such that he can proceed to the next tab. So I've done a check, on clicking next , it verifies if the list use to populate the datatable is empty or not. If not he can proceed. Now my problem is on clicking back ,validation is prompted. How can I prevent this? The validation should be prompted only when clicking next.
<p:wizard flowListener="#{CarComponent.onFlowProcess}" showStepStatus="true">
<p:tab id="model" title="Model">
<p:panel>
<p:messages />
<h:panelGrid id="mdl" columns="2" styleClass="grid"
columnClasses="label,value">
<h:outputText
value="Date" />
<p:calendar id="date"
value="#{}"
required="true" converter="primefacesCalendarConverter"
pattern="dd/MM/yyyy" />
</h:panelGrid>
</p:panel>
</p:tab>
<p:tab id="part">
<p:panel>
<p:messages />
<h:panelGrid id="partdetails" columns="2" styleClass="grid"
columnClasses="label,value">
<h:outputText
value="PartNo:" />
<h:inputText id="partno"
value="#{..}"
required="false" maxlength="500">
</h:inputText>
<h:inputHidden
required="#{empty CarComponent.partList}"
requiredMessage="Please enter a Part."
/>
<h:panelGroup>
<p:commandButton image="save" ajax="false"
value="Save" process="@this,partno"
action="#{CarComponent.saveCarDetails(...)}" />
</h:panelGroup>
</h:panelGrid>
</p:panel>
<p:panel>
<h:panelGroup>
<p:dataTable id="dta_obj" editable="true"
value="#{CarComponent.partList}"
var="currentobj" rows="15" paginator="true"
paginatorPosition="bottom">
<p:column>
<f:facet name="header">
<h:outputText
value="Part No:" />
</f:facet>
<p:cellEditor>
<f:facet name="output">
<h:outputText value="#{current.partno}" />
</f:facet>
<f:facet name="input">
<h:inputText value="#{current.partno}" />
</f:facet>
</p:cellEditor>
</p:column>
</p:dataTable>
</h:panelGroup>
</p:panel>
</p:tab>
...
</p:wizard>
The flow listener is as follows:
public String onFlowProcess(FlowEvent event) {
if (event.getOldStep().contains("model")) {
//some code here
}
if (event.getOldStep().contains("part")) {
partList = car.getPart();
if(partList.isEmpty()){
String errorMsg="Please enter a Part.";
FacesContext.getCurrentInstance().addMessage(null,new FacesMessage(FacesMessage.SEVERITY_ERROR,errorMsg, ""));
return event.getOldStep();
}
}
return event.getNewStep();
}