Question

In JSF you can use EL expression to set the styleClass as follow:

<rich:column>
 <h:outputText value="12" id="sumOfAllValues" styleClass="#{!t330RowItems.showSpecialField ? 'rich-table-green' : 'rich-table-cell'}"/>
</rich:column>

Now I am building the table in Java code using org.richfaces.component.html.HtmlColumn the only problem is when do this:

htmlColumn.setStyleClass("#{!t330RowItems.showSpecialField ? 'rich-table-green' : 'rich-table-cell'}");

The following HTML is generated:

<tbody id="j_id154:tb">
 <tr class="rich-table-row rich-table-firstrow ">
  <td class="rich-table-cell #{!t330RowItems.showSpecialField ? 'rich-table-green' : 'rich-table-cell'}" id="j_id154:0:j_id155">55</td>
 </tr>

The problem is it is not evaluating the EL expression. Any ideas on how I can get it to either have rich-table-cell or rich-table-green as styleClass?

Answer 1

You need to set it as a fullworthy ValueExpression instead of as a plain vanilla String. You can create one by ExpressionFactory#createValueExpression(). You can obtain the expression factory in JSF context by Application#getExpressionFactory().

So, this should do:

ValueExpression styleClassVE = context.getApplication().getExpressionFactory()
    .createValueExpression(context.getELContext(), "#{!t330RowItems.showSpecialField ? 'rich-table-green' : 'rich-table-cell'}", String.class);

htmlColumn.setStyleClass(styleClassVE);
// or htmlColumn.setValueExpression("styleClass", styleClassVE);