XMLEncoder ignores the transient flag of a bean info of a collection

Hi!

I use XMLEncoder to encode some files in XML. I want to ignore transient fields like with the plain binary serialization. I use the following piece of code inspired of a tutorial of Sun Microsystems to do so:

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/**
    * force the XML encoder/decoder to ignore transient members like the binary serialization
    * FIXME: it does not work properly with collections and arrays
    * @param myClass
    */
    public static final void forceHandlingOfTransientModifiersForXMLSerialization(Class<?> myClass){
        BeanInfo beanInfo = null;
        try{beanInfo=Introspector.getBeanInfo(myClass);} 
        catch(IntrospectionException ie)
        {ie.printStackTrace();}
        if(beanInfo!=null)
            {PropertyDescriptor[] propertyDescriptors=beanInfo.getPropertyDescriptors();
             String fieldName;
             //for each non inherited declared field
             for(Field field:myClass.getDeclaredFields())
                 //if this field is transient for binary serialization
                 if(Modifier.isTransient(field.getModifiers()))
                     {fieldName=field.getName();
                      for(PropertyDescriptor propertyDesc:propertyDescriptors)
                          if(propertyDesc.getName().equals(fieldName))
                              {//set this field to transient for the XML serialization too
                               propertyDesc.setValue("transient",Boolean.TRUE);
                               break;
                              }
                     }
            }
    }

It works fine except on collections and arrays. For example, if myClass has a field containing a list of image with the transient modifier, it attempts to encode this list Sad

When I use the debug feature of Eclipse, I see that its property descriptor is found and modified. Do you have an idea? Thank you very much for your attention.