How to construct dynamically attribute name in xhtml - JSF

Question

I want to assign a dynamic value to an input in xhtml page. The ManagedBean contains 3 string attributes: customField1, customField2 and customField3

In the xhtml page I'm looping over a list of values to custruct components:

<ui:repeat  value="#{listBean.customFields}" var="item" varStatus="status">
<div >
    <p:outputLabel value="#{item.label}" />
    <br />
    <c:set var="test" value="#{'myBean.customField'.concat(status.index)}"/>

    <p:inputText value="#{test}"   />
</div>
</ui:repeat>

What I did for concatenation does not work since it concider that the whole expression is a String so it is unable to bind "#{test}" with the bean attribute.

You think it is possible to do that in jsf ?

thanks in advance !

cant you just do value="#{myBean.customField}#{status.index}" — j.con
– j.con, Commented Oct 27, 2015 at 17:14
I tried that..It does not work =>javax.el.PropertyNotFoundException: page.xhtml value="#{myBean.customField}#{status.index}": The class 'com.xxx.yyy.zzz.MyBean' does not have the property 'customField' — javaxiss
– javaxiss, Commented Oct 27, 2015 at 17:18
does customField have public getters/setters in your backing bean? — j.con
– j.con, Commented Oct 27, 2015 at 17:19
the backing bean contains only customField1, customField2 and customField3 with public getters and setters — javaxiss
– javaxiss, Commented Oct 27, 2015 at 17:22
Please ignore comments of j.con. He clearly came here along [java] tag (which Kukeltje rightfully removed) and is merely doing blind guesses. In future JSF questions, please don't use [java] tag. — BalusC
– BalusC, Commented Oct 27, 2015 at 18:52

frifle · Accepted Answer · 2015-10-27 17:19:20Z

1

Please try

<p:inputText value="#{myBean['customField'.concat(status.index)]}"/>

answered Oct 27, 2015 at 17:19

frifle

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3 Comments

javaxiss Over a year ago

Thanks for your answer..that does not work : javax.el.PropertyNotFoundException: page.xhtml value="#{myBean.customField}#{status.index}": The class 'com.xxx.yyy.zzz.MyBean' does not have the property 'customField'. By the way, on the xhtml there was a warning about EL syntax starting at concat

BalusC Over a year ago

Your error message doesn't match the code in answer.

javaxiss Over a year ago

Sorry ! you are right ! I think it works et does the binding correctly. However, since I have only customField1, customField2 and customField3 I put #{myBean['customField'.concat(status.index+1)]} and I got this error message : The class 'com.xxx.yyy.zzz.MyBean' does not have the property 'customField4'. Note that customFields contains only 3 elements... I do not understand why it is going until customField4 despite the length of the list = 3. When displaying the EL expression I got 1 , 2 and 3 ! I'm confused.. Why it is doing an additional iteration in the binding ?

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