Check any celleditor in a data table is in edit mode - jsf-2

Question

I have a data table displying some application parameters having 3 columns:
name (outputext),
value (p:cellEditor) and
edit (p:rowEditor used)
On clicking edit button in any row value field converts into input field and is having validator attached. After changing and accepting( clicking check icon) values an 'update button' is provided at the bottom of page to save all changes.
My problem is if a validation error comes and we press 'update button' then call goes to save function in managed bean with old value. So to stop this I want to disable 'update button' when any row is having edit mode opened. Can I check the mode of all cell editors in column 2 , so I will use that in disabled attribute of update button.
Please do suggest any other better way is also possible ?
Using a jsf 2.1 and primefaces 3.5
XHTML snippet
<!-- Body panel for display of individual configuration mode -->
<p:panel id="mainConfigPanel" >
<!-- status message section -->
<p:messages id="msg" autoUpdate="true" closable="true"/>
<!-- Parameter configuration mode -->
<p:panel
rendered="#{configMBean.configUtility.configParamModeOn}"
styleClass="panelNoBorder">
<p:dataTable id="configParamTable" var="configParamVar"
value="#{configMBean.configParamList}" editable="true">
<p:ajax event="rowEdit" listener="#{configMBean.onRowEdit}" update=":mainForm:msg" />
<p:ajax event="rowEditCancel" listener="#{configMBean.onRowCancel}" update=":mainForm:msg" />
<p:column headerText="Parameter Name" sortBy="#{configParamVar.paramConfigName}">
<h:outputText id="paramNameId" value="#{configParamVar.paramConfigName}" />
</p:column>
<p:column headerText="Param Value" sortBy="#{configParamVar.paramConfigValue}">
<p:cellEditor>
<f:facet name="output" > <h:outputText value="#{configParamVar.paramConfigValue}" /> </f:facet>
<f:facet name="input">
<p:inputText id="paramValueId" value="#{configParamVar.paramConfigValue}" required="true"
validator="#{configMBean.validateParam}" >
<f:validateLength maximum="2000" />
<f:attribute name="input" value="#{configParamVar}" />
</p:inputText>
</f:facet>
</p:cellEditor>
</p:column>
<p:column headerText="Edit" style="text-align:center;vertical-align:top;width:20px">
<p:rowEditor />
</p:column>
</p:dataTable>
<h:panelGrid columns="2" >
<p:commandButton value="Update Parameters" actionListener="#{configMBean.saveParamUpdate}" update=":mainForm" />
<p:commandButton value="Cancel" actionListener="#{configMBean.cancelParamUpdate}" immediate="true" update=":mainForm">
</p:commandButton>
</h:panelGrid>
</p:panel>
<!-- End of Parameter configuration mode panel -->
</p:panel>
<!-- End of body panel for individual configuration mode -->
</p:panelGrid>
<!-- end of main panel -->
Functions in Managed Bean
public void onRowEdit(RowEditEvent event) {
System.out.println(" In Row Edit");
}
public void onRowCancel(RowEditEvent event) {
System.out.println("In Row Canel of Parameter Config");
}
public void validateParam(FacesContext facesContext, UIComponent component,
Object value) throws ValidatorException, Exception {
if (value != null) {
//Getting parameter Name and Value for validation
String paramName = ((RowEntity) component.getAttributes().get("input")).getParamConfigName();
String paramValue = (String) value;
FacesMessage msg = null;
//Validation Cases
if (paramName.equalsIgnoreCase(ResourceBundle.getMsg("Param_Enable_FTP"))) {
if (!paramValue.equalsIgnoreCase("true") || !paramValue.equalsIgnoreCase("false")) {
msg = new FacesMessage(FacesMessage.SEVERITY_WARN, ResourceBundle.getMsg("Param_True_False_Validation")+ paramName, "");
throw new ValidatorException(msg);
}
} else if (paramName.equalsIgnoreCase(ResourceBundle.getMsg("Param_Contingency_Reserve"))) {
if (!Pattern.matches("-?\\d*\\.?\\d*", paramValue)) {
msg = new FacesMessage(FacesMessage.SEVERITY_WARN, ResourceBundle.getMsg("Param_Number_Validation") + paramName, "");
throw new ValidatorException(msg);
}
}// end if else if
}
}

Answer 1

From the docs: There is an Ajax Behavior Event for rowEdit
rowEdit | org.primefaces.event.RowEditEvent | When a row is edited.
You could disable the update button when the RowEditEvent got fired and release the button after the row editing was canceled or saved.
I Hope I got your question right and this helps.