The value of attribute "rendered" associated with [...] must not contain the '<' character

Question

I have numeric values in a p:dataTable. When the value is less than 0, a "-" symbol should be inserted instead of a value.

I tried using c:if, which doesn't work. I was reading and people suggest the rendered flag.

The code is:

<p:column headerText="Valor">
    <h:outputText rendered="${valor.valor > 0}" value="${valor.valor}" />
    <h:outputText rendered="${valor.valor <= 0}" value="${valorMB.noDato}" />
</p:column>

and the server give me this error:

The value of attribute "rendered" associated with an element type "h:outputText" must not contain the '<' character

If I use c:if the table appears without data:

<c:if test="#{valor.valor > 0}">
    <h:outputText value="#{valor.valor}" />
    <c:otherwise>
        <h:outputText value="-" />
    </c:otherwise>
</c:if>  

How can I resolve my problem?

Answer 1

Use keyword based EL operators instead of symbol based EL operators:

<h:outputText rendered="#{valor.valor gt 0}" value="#{valor.valor}" /> <!-- valor.valor > 0 -->
<h:outputText rendered="#{valor.valor le 0}" value="-" /> <!-- valor.valor <= 0 -->

• lt (lower than)
• gt (greater than)
• le (lower than or equal)
• ge (greater than or equal)
• eq (equal)
• ne (not equal)
• and
• or

Answer 2

You are getting that error because "<" character is illegal in string inside xml. You should use Expression Language way of comparing.

In your situtation you should use le which means means less than or equal.

Change "${valor.valor <= 0}" to "${valor.valor le 0}"