Primefaces cellEditor required inputText - jsf

Question

I have a PrimeFaces p:dataTable with one column of type p:cellEditor with an p:inputText field.
This inputText is supposed to be required but if I set required="true" and leave the input empty nothing happens / no message is shown. The form including the above is submitted anyway.
Here's my code, especially the <p:column headerText="Data Value"> part:
<h:form id="my-form">
<p:dataTable var="dataItem" rowIndexVar="rowIndex" value="#{backingBean.dataList}" draggableRows="true" editable="true" editMode="cell">
<p:ajax event="rowReorder" update="#form"/>
<p:column headerText="Order Position">
<h:outputText value="#{rowIndex+1}" />
</p:column>
<p:column headerText="Data Name">
<h:outputText value="#{dataItem.name}" />
</p:column>
<p:column headerText="Data Value">
<p:cellEditor>
<f:facet name="output"><h:outputText value="#{dataItem.value}" /></f:facet>
<f:facet name="input"><p:inputText required="true" requiredMessage="Please insert a value" id="valueInput" value="#{dataItem.value}" style="width:100%"/></f:facet>
</p:cellEditor>
</p:column>
</p:dataTable>
<div>
<h:commandLink action="#{backingBean.submit()}">Submit</h:commandLink>
</div>
<h:messages id="validateMsg" />
</h:form>
The submitting h:commandLink is not an ajax call. But in my opinion it shouldn't submit the form anyway as long as the required p:inputText fields are empty.
I also tried using h:inputText instead of p:inputText with the same result.
I tried to add a required h:inputText outside the p:dataTable which works as expected and prevents the form from being submitted as long as it is empty.
Any ideas about how I get a required p:inputText field in p:cellEdit ?

Answer 1

According to rion18's suggestion. I'm checking in my backing bean if all values are set. Only if all values are set the submit button is shown. Here's how I ended up doing this:
<h:form id="my-form">
<p:dataTable var="dataItem" rowIndexVar="rowIndex" value="#{backingBean.dataList}" draggableRows="true" editable="true" editMode="cell">
<p:ajax event="cellEdit" update=":#{p:component('submit-button-group')}" />
<p:column>
...
</p:column>
</p:dataTable>
<div>
<h:panelGroup id="submit-button-group">
<h:commandLink action="#{backingBean.submit()}" rendered="#{backingBean.isAllValuesSet()}">Submit</h:commandLink>
</h:panelGroup>
</div>
</h:form>
In my backing bean I have a simple function that iterates over the dataList:
public boolean isAllValuesSet(){
for(DataItem item:dataItems){
if(item.getValue()==null || item.getValue().isEmpty()){
return false;
}
}
return true;
}