Duvida na utilização de DynaValidatorActionForm

<form-bean name="despachanteForm" type="org.apache.struts.validator.DynaValidatorActionForm" dynamic="true">
      <form-property name="codigo"   type="java.lang.Long"/>
      <form-property name="nome"     type="java.lang.String" />
    </form-bean>

<action path="/despachante" 
            name="despachanteForm" 
            type="br.com.fts.exp.action.DespachanteAction" 
            scope="session" 
            validate="true" 
            input="fts.despachante"
            parameter="metodo">
      <forward name="edita"   path="fts.despachante"/>
    </action>

<form name="despachanteForm"> 		
     <field property="nome" depends="required">
	<arg0 key="despachanteForm.nome"/>
     </field>  
</form>

<html:javascript formName="despachanteForm"/>

<html:form action="despachante.do?metodo=salva" method="post">
   // meu form normal com os input's....
      <html:text property="nome" name="despachante" size="40">
      <html:errors property="nome"/>   
</html:form>

package br.com.fts.exp.action;

import java.util.Collection;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.DynaActionForm;
import org.apache.struts.actions.DispatchAction;

import br.com.fts.exp.bean.Despachante;
import br.com.fts.exp.dao.DespachanteDAO;

public class DespachanteAction extends DispatchAction {

	public ActionForward novo(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
			throws Exception {

		HttpSession session = request.getSession();
		Collection listaDespachantes = DespachanteDAO.getInstance().listaTodos();
		Despachante despachante = new Despachante();

		session.setAttribute("listaDespachantes", listaDespachantes);
		session.setAttribute("despachante", despachante);

		return mapping.findForward("edita");
	}
	
	public ActionForward salva (ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
			throws Exception {

		DynaActionForm formDinamico = (DynaActionForm) form;
		Despachante despachante = new Despachante();

		despachante.setCodigo((Long) formDinamico.get("codigo"));
		despachante.setNome((String) formDinamico.get("nome"));		

		DespachanteDAO.getInstance().salva(despachante);
		
		formDinamico.reset(mapping, request);

		return mapping.findForward("sucesso");
	}	
	
}