rowCount

[kh2ouija]

I use rowCount to get a collection's size, like this:

<ui:repeat value="#{departments}" var="department" rendered="#{departments.rowCount > 0}">
 <h:outputText rendered="#{department.employees.rowCount > 0}" value="this department has employees"/>
</ui:repeat>

The first rowCount is evaluated correctly; for the second rowCount (the one from employees) I get this:

SEVERE: Error Rendering View[/departments.xhtml]
java.lang.NumberFormatException: For input string: "rowCount"
at java.lang.NumberFormatException.forInputString(NumberFormatException.java:48)
at java.lang.Integer.parseInt(Integer.java:447)
at java.lang.Integer.parseInt(Integer.java:497)
at com.sun.facelets.el.LegacyELContext$LegacyELResolver.getValue(LegacyELContext.java:138)

If I just simply iterate the employees works ok, but the rowCount doesn't, why? Thanks.

[kh2ouija]

Ok. so I used #{not empty department.employees} instead and this works. For educational reasons, what was wrong with using rowCount here?

[kh2ouija]

<h:outputText value="You have #{websites.rowCount} websites." rendered="#{not empty websites}"/>

This exact bit renders to "You have 0 websites." for an empty list, does anyone have any idea why?

[gavin.king]

rowCount is a property of DataModel. If you have an ordinary collection, it is not the correct way.

[falazar]

What would be the correct way here?

James

[gavin.king]

#{size websites} works, i think

[falazar]

Im actually trying to put a count column for each row, but not sure exactly how, or real familiar with the inner workings of JSF.

in jBPM I have
<ui:repeat var="taskInstance" value="#{participantBean.personalTaskInstances}">

<h:outputText value="*NEEDCNT*"/>.

Where I loop through these instances #{taskInstance.name}

James

[gavin.king]

Oh, for that I don;t know any way other than wrapping it in a DataModel and using #{dataModel.rowIndex}.

I've never needed to do this...