Using Ternary Operator to implement else if in EL - jsf

Question

I have an application being developed in jsf 2.0, primefaces and using Eclipse Kepler IDE. I need to display a string value in dataTable for long value. There could be 6 possible values from 1 to 6. i have followed this question to solve my issue but i cant. my code snipped is

  <p:dataTable var="student" value="#{studentBean.studentList}">
  <p:column headerText="Class">
    <h:outputText value="#{student.studentClass == 1? 'One' :
                           student.studentClass == 2? 'Second' :
                           student.studentClass == 3? 'Third' :
                           student.studentClass == 4? 'Fourth' :
                           student.studentClass == 5? 'Fifth':
                           student.studentClass == 6? 'Sixth':''}" />
  </p:column>
      ....

i also tried:-

   student.studentClass.equals(1l) and  student.studentClass.equals(1L)

but no luck. What am i doing wrong

So it's a `long`? What do `#{student.studentClass}` and `#{student.studentClass['class']}` print? — BalusC, Apr 26 '16 at 14:16
#{student.studentClass} prints 1 , 2 etc for which i need to show One, Second ... — jaykio77, Apr 26 '16 at 15:01
if you're calling the backing bean anyway why don't you return the value from there? — raven, Apr 26 '16 at 15:42
You still haven't told what `#{student.studentClass['class']}` prints. The answer depends on that. — BalusC, Apr 26 '16 at 20:01

score 1 · Accepted Answer · answered Apr 26 '16 at 15:45

1

Wouldn't this approach work too?

<h:outputText rendered="#{student.studentClass == 1}" value="One" />
<h:outputText rendered="#{student.studentClass == 2}" value="Two" />
 ...
<h:outputText rendered="#{student.studentClass == 6}" value="Six" />

answered Apr 26 '16 at 15:45

raven

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score 1 · Answer 2 · answered Apr 26 '16 at 22:36

I would prefer adding a simple change in the model, say:

Class Pojo/Entity

public class Student{

   ...

   // Add transient annotation only if is an entity class
   @Transient
   private String valueToShow;

   public String getValueToShow(){
     if("1".equals(this.studentClass){
       return "One";
     } else if("2".equals(this.studentClass){
       return "Two";
     }
       ...
  }

}

Then, add this change to the xhtml file (JSF Page):

<p:dataTable var="student" value="#{studentBean.studentList}">
  <p:column headerText="Class">
    <h:outputText value="#{student.valueToShow}" />
  </p:column>
  ....

Using Ternary Operator to implement else if in EL - jsf

2 Answers2