[castor-user] Howto map a TreeMap ?

[castor sylvain]

Hi,

I desperatly try to map a ordered TreeMap.
(It works fine if this map is a basic HashMap)

The mapping :
   [...]
   <class name="com.mycompany.myproduct.FormRadio">
       <field name="radios" collection="hashtable">
           <bind-xml name="radio">
               <class name="org.exolab.castor.mapping.MapItem">
                   <field name="key" type="java.lang.String">
                       <bind-xml name="key" node="attribute" />
                   </field>
                   <field name="value" type="java.lang.String">
                       <bind-xml node="text"/>
                   </field>
               </class>
           </bind-xml>
       </field>
   </class>
   [...]


The class :
import java.util.Map;
public class FormRadio extends FormField {
   private Map radios = null;
   [...]
   public Map getRadios() {
       return radios;
   }
   public void setRadios(Map radios) {
       this.radios = radios;
   }
}


The "radios" map on FormRadio class is a TreeMap, based/ordered on a Java
Comparator.
It doesn't really fail, but the "value" fields of my TreeMap are not
outputed.
(only the keys are outputed in attribute, as specified).

Even if i replace :
1) collection="hashtable" ... by : collection="map"
2) <bind-xml node="text"/> ... by : <bind-xml name="value"
node="attribute"/>


Thanks in advance for any workaround, or any suggestion about a matching
mapping file.
;-)