SelectBooleanCheckbox corresponding to a numeric db field

Question

Hi all,
I am trying to use JSF (and Icefaces, but in this case I don't think this matters) to display and let users edit some info from a (MySQL) database. In my tables, I have various tinyint fields I use for boolean values. I want to display these in a form as checkboxes and be able to properly update the database upon select/deselect.
The problem I am encountering is with converting the boolean value to numeric. I first tried something like:
<h:selectBooleanCheckbox value="myBean.numValue != 0" converter="javax.faces.Byte"/>
thinking that the converter would convert the boolean value of the checkbox into byte when the form is submitted. This didn't work and I got type mismatch exception.
I can implement what I want by using the valueChangeListerner and converting the values in the event handling method, but I would like to, if possible, not have to write any code in the backing bean.
Can you give me an example of how I can do what I described above or recommend a good learning source?
Thanks.

Answer 1

I created an own Checkbox Renderer which extends com.sun.faces.renderkit.html_basic.CheckboxRenderer and overwrite the method getConvertedValue.
    public Object getConvertedValue(FacesContext context, UIComponent component, Object submittedValue)
              throws ConverterException
        Converter converter = ((ValueHolder) component).getConverter();
        return converter.getAsObject(context, component, (String)submittedValue);
    }