From: <webtier_at_javadesktop.org>
Date: Mon, 27 Jul 2009 04:27:09 PDT

that's what I meant :

selectone.setValueExpression("value", JSFUtils.createValueExpression("#{category.category_id}|#{category.category_value}", String.class));
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http://forums.java.net/jive/thread.jspa?messageID=357661