CODEWITHSUNDEEP
jsfel
gladiatr
gladiatr

Reputation: 13

JSF EL expression does not work in required attribute of HtmlInputText

I am adding JSF components dynamically into an XHTML page created using JSF 1.2 with facelets. The required validation of some of these components have to be carried out only when a specfic button in the page is clicked. So I've added the required attribute as an EL expression using the code:

String requiredExpression = "#{not empty param['form:button']}")
component.setValueExpression("required", 
                       createValueExpression(requiredExpression, String.class));

I have verified that the EL expression works by placing it in the required attribute of one of the static components in the page. I have also verified that the EL expression is getting added to the component by debugging the code. But it just does not work in the dynamic components.

Upvotes: 1

Views: 447

Answers (1)

BalusC
BalusC

Reputation: 1108692

The expression must evaluate to a boolean, not a String.

Replace

createValueExpression(requiredExpression, String.class)

by

createValueExpression(requiredExpression, boolean.class)

Upvotes: 1

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