Concatenation inside a JSF expression

Question

I'm trying to concatenate a number inside my JSF expression:

<h:dataTable class="seminaire" value = "#{seminaireControl.getList()}" var = "seminaire">

    <c:forEach begin="1" end="#{extraControl.getNb()}" var="nb">
        <h:column>
            <f:facet name="header">seminaire #{nb}</f:facet>
            <h:inputText value="#{seminaire.value+#{nb}"/>
        </h:column>
    </c:forEach>

</h:dataTable>

What I'm trying to have is something like #{seminaire.value1}, #{seminaire.value2}, ...

@Vebbie unfortunately no, the class Seminaire does not have the property 'value'. My class only has properties value1, value2... — MA-Moustache, Jan 17 '19 at 10:24
oh. Then you can write it as #{seminaire.['value'.concat(nb)]} — Vebbie, Jan 17 '19 at 10:35
I tried `${seminaire.value[nb]}` , `#{seminaire.['value'.concat(nb)]}`, `#{seminaire.[value.concat(nb)]}`, `#{seminaire.value[nb]}` but it's still not working :$ — MA-Moustache, Jan 17 '19 at 10:45
As @Selaron suggested by removing first dot, it will be "#{seminaire['value'.concat(nb)]}" — Vebbie, Jan 17 '19 at 10:49
My bad, I misunderstood you `value="#{seminaire['value'.concat(nb)]}"` does work, thanks everyone — MA-Moustache, Jan 17 '19 at 10:49
Hi, this is EL, not java, not html, not jsf and not java-ee. The duplicate contains all relevant info. — Kukeltje, Jan 17 '19 at 11:14
A better duplicate would be https://stackoverflow.com/questions/6249086/jsf-concatenation-of-property-name-el — Jasper de Vries, Jan 17 '19 at 12:15

score 0 · Accepted Answer · answered Jan 17 '19 at 10:55

Concluding the above, to help other users for EL syntax to be used in proper manner. (The + operator is in EL exclusively a sum operator.)

<h:dataTable class="seminaire" value = "#{seminaireControl.getList()}" var = "seminaire">

<c:forEach begin="1" end="#{extraControl.getNb()}" var="nb">
    <h:column>
        <f:facet name="header">seminaire #{nb}</f:facet>
        <h:inputText value="#{seminaire['value'.concat(nb)]}"/>
    </h:column>
</c:forEach>

Concatenation inside a JSF expression

1 Answers1