Cross Field Validation in JSF h:dataTable

Question

I have a XHTML page in which there are four textboxes

<h:column >  
    <f:facet name="header">  
       <h:outputText value="Start Date" />  
    </f:facet>
    <h:inputText id="startDate" value="#{sampleVO.startDate}" />
</h:column>         
<h:column >  
    <f:facet name="header">  
       <h:outputText value="End Date" />  
    </f:facet>
    <h:inputText id="endDate" value="#{sampleVO.endDate}" />
</h:column>        
<h:column >
    <f:facet name="header">  
        <h:outputText value="Start Date" />  
    </f:facet>
    <h:inputText id="startDate1" value="#{sampleVO.startDate}" />
</h:column>         
<h:column >  
    <f:facet name="header">
       <h:outputText value="End Date" />  
    </f:facet>
    <h:inputText id="endDate1" value="#{sampleVO.endDate}" />
</h:column>

I need to put a validation on Start Date and End Date. If user enters some Start and End date in id="startDate" & id="endDate" lets say Start Date: "01/01/2012" (1jan) and End Date: 01/31/2012 and if user enters some dates on id="startDate1" and id="endDate1" id="startDate1" should always be greater thn id="endDate" i.e date Ranges should not Overlap

public class SampleServiceimpl implements SampleService {
    private List<SampleVO> listOfSample;

     //this function gets called when clicked on Submit button on XHTML page
     public Void submit() {
        // how can i call datesOverLaps function to check entered
        // start date and End date not overlapping, Also how to
        // display the error message on XHTML page using FacingContext
     }

     public boolean datesOverlaps(List<SampleVO> sampleVO) {
        final Date early = sampleVO.getStartDate();
        final Date late = sampleVO.getEndDate();

        for(SampleVO existing : sampleVO) {
            if(!(early.isAfter(existing.getEnd())) ||
                     (late.isBefore(existing.getStart()))){
                return true;
            }
        }
        return false;
    }
}

Not sure if the above boolean function is current and would work in the scenario. Any help would be appreciated.

You might want to look at cross field validation (which IMO JSF has never got right) - http://stackoverflow.com/questions/6282466/jsf2-0-doesnt-support-cross-field-validation-is-there-a-workaround Or if you're JEE6 maybe look at Bean Validation — planetjones, Feb 10 '12 at 07:46

score 3 · Accepted Answer · edited Sep 10 '12 at 07:59

I spend 6 hours on this. But i solved it. My english is bad.

Add binding atribute on dataTable, pointing to UIDData field in backingbean (Bind table)

 <h:dataTable value="#{narocilo.podatki}" id="tabela" var="podatek" border="0" bgcolor="#F6FAF0" style="width:100%;" cellspacing="0" cellpadding="2" headerClass="header" rowClasses="#{narocilo.rowClasses}"   columnClasses="align_left,align_right,align_center,align_right,align_right,align_center_konec" **binding="#{narocilo.podatkiData}"**>

Before the end of form ad

<h:inputHidden id="validator" **validator="#{narocilo.validateKolicinaCena}"** value="morabiti"/>

validator method in backing bean

 public void validateKolicinaCena(FacesContext aContext,UIComponent aComponent,Object aValue) {

int shrani_index = fPodatkiData.getRowIndex();

UIComponent column_kol = fPodatkiData.getChildren().get(2);
UIComponent column_cen = fPodatkiData.getChildren().get(5);

for(int i=0; i<fPodatkiData.getRowCount(); i++) {

    fPodatkiData.setRowIndex(i);

    UIInput kolicina_input = (UIInput) column_kol.findComponent("kolicina");
    UIInput cena_input = (UIInput) column_cen.findComponent("cena");

    Object kolicina = kolicina_input.getLocalValue();
    Object cena = cena_input.getLocalValue();

    if(kolicina == null && cena != null) {

        kolicina_input.setValid(false);

        FacesMessage sporocilo = Sporocila.getMessage("si.alkimisticus.bitea.error", "javax.faces.component.UIInput.REQUIRED", null);
        sporocilo.setSeverity(FacesMessage.SEVERITY_ERROR);

        aContext.addMessage(kolicina_input.getClientId(aContext), sporocilo);

    } else if(kolicina != null && cena == null) {

        cena_input.setValid(false);

        FacesMessage sporocilo = Sporocila.getMessage("si.alkimisticus.bitea.error", "javax.faces.component.UIInput.REQUIRED", null);
        sporocilo.setSeverity(FacesMessage.SEVERITY_ERROR);

        aContext.addMessage(cena_input.getClientId(aContext), sporocilo);

    } else {
        kolicina_input.setValid(true);
        cena_input.setValid(true);
    }


}

fPodatkiData.setRowIndex(shrani_index);}

Cross Field Validation in JSF h:dataTable

1 Answers1