JSF Basics Getting the value of an EL expression in code

You can use the following code to get the value of any EL expression defined inside your JSF page For example the following checks the value of the expression #{requestScope.requestRowKey}

        // access the faces context
        FacesContext fc = FacesContext.getCurrentInstance();

        ValueBinding vb = fc.getApplication().createValueBinding("#{requestScope.requestRowKey}");
        String rowKey = (String )vb.getValue(fc);

Assigning a new value can be preformed by using vb.setValue( Object o)