How to check calendar value is null or empty in xhtml attribute

Question

I have a column in my jsf page, i'm using primefaces dataTable:

e.g:

<p:column headerText="Last Trip End Time" width="100" rendered="#{selectedColumnsBeanForDPR.endTime and userBean.user.allowedFeatures.containsKey('LastTripEndTime')}" >
    <h:outputText value="#{car.dailyTrakingReportBean.endTime.time}" >
        <f:convertDateTime type="both" dateStyle="default" pattern="h:mm:ss a MM/dd/yyyy" />
    </h:outputText>
</p:column>

Now the issue is that when I have getting null value in 'endTime' Calendar variable its shows me empty column. How can i show '--' when endTime is null?

you can use EL expression for checking null like `#{car.dailyTrakingReportBean.endTime eq null}` then `` — Hiren, Sep 20 '16 at 09:42
I have already do this way but it show me : Could not convert 'false' to a string. this error — zeeshan nazakat, Sep 20 '16 at 09:46

score 3 · Accepted Answer · answered Sep 21 '16 at 10:58

You need to set a condition to check the value of endDate, when it's null you show "--" :

<h:outputText value="#{car.dailyTrakingReportBean.endTime.time == null ? '--' : car.dailyTrakingReportBean.endTime.time}" >
    <f:convertDateTime type="both" dateStyle="default" pattern="h:mm:ss a MM/dd/yyyy" />
</h:outputText>

How to check calendar value is null or empty in xhtml attribute

1 Answers1