public Object getAttribute(String name,
    Configuration modeConf,
    Map objectModel) throws ConfigurationException 
{
        String pname = (String) this.settings.get("parameter", name);
        if ( modeConf != null ) {
            pname = modeConf.getAttribute( "parameter", pname );
            // preferred
            pname = modeConf.getChild("parameter").getValue(pname);
        }
        return ObjectModelHelper.getRequest(objectModel).getParameter( pname );
}

 public Iterator getAttributeNames(Configuration modeConf,
    Map objectModel) throws ConfigurationException 
{
        return new IteratorHelper(ObjectModelHelper.getRequest(objectModel).getParameterNames());
}

 public Object[] getAttributeValues(String name,
    Configuration modeConf,
    Map objectModel) throws ConfigurationException 
{
        Request request = ObjectModelHelper.getRequest(objectModel);
        String wildcard = (String) this.settings.get("parameter", name);
        if ( modeConf != null ) {
            wildcard = modeConf.getAttribute( "parameter", wildcard );
            // preferred
            wildcard = modeConf.getChild("parameter").getValue(wildcard);
        }
        int wildcardIndex = wildcard.indexOf( "*" );
        if ( wildcardIndex != -1 ) {
            // "*" contained in parameter name = > combine all
            // parameters' values that match prefix, suffix
            // split the parameter's name so that the "*" could be
            // determined by looking at the parameters' names that
            // start with the prefix and end with the suffix
            //
            String prefix = wildcard.substring( 0, wildcardIndex );
            String suffix;
            if ( wildcard.length()  >= wildcardIndex + 1 ) {
                suffix = wildcard.substring( wildcardIndex + 1 );
            } else {
                suffix = "";
            }
            SortedSet names = new TreeSet();
            Enumeration allNames = request.getParameterNames();
            while (allNames.hasMoreElements()) {
                String pname = (String) allNames.nextElement();
                if ( pname.startsWith( prefix ) && pname.endsWith( suffix ) ) {
                    names.add(pname);
                }
            }
            List values = new LinkedList();
            Iterator j = names.iterator();
            while (j.hasNext()){
                String pname = (String) j.next();
                values.add( request.getParameter( pname ) );
            }
            return values.toArray();
        } else {
            // no "*" in parameter name = > just return all values of
            // this one parameter.
            return request.getParameterValues( wildcard );
        }
}