[Springframework-developer] About binding process

[Rodney G. A. \(Krosslink\) <ro...@kr...>]

Hi, I have some problem in the MVC's binding process, when a class have =
two properties of the same type, eg:

class Wheel {

  private Long id;
  private String name;
 =20
}

class Car {

  private Wheel wheel1;
  private Wheel wheel2;=20

}

This two classes with his sets and gets appropiates methods, and a jsp =
to drive this properties like that excerpt:

<tr>
  <td>Wheel 1:</td>
    <spring:bind path=3D"obj.wheel1.id">
        <td>
          <select name=3D"<c:out value=3D"${status.expression}"/>">
            <c:forEach var=3D"wheel" items=3D"${wheels}">
         <c:if test=3D"${obj.wheel1.id =3D=3D wheel.id}">
                  <OPTION selected=3D"<c:out =
value=3D"${obj.wheel1.id}"/>" value=3D"<c:out =
value=3D"${wheel.id}"/>"><c:out value=3D"${wheel.name}"/></OPTION>
         </c:if>
         <c:if test=3D"${obj.wheel1.id !=3D wheel.id}">
             <OPTION value=3D"<c:out value=3D"${wheel.id}"/>"><c:out =
value=3D"${wheel.name}"/></OPTION>
         </c:if>
            </c:forEach>
          </select>
        </td>
   </spring:bind>
</tr>

<tr>
  <td>Wheel 2:</td>
    <spring:bind path=3D"obj.wheel2.id">
        <td>
          <select name=3D"<c:out value=3D"${status.expression}"/>">
            <c:forEach var=3D"wheel" items=3D"${wheels}">
         <c:if test=3D"${obj.wheel2.id =3D=3D wheel.id}">
                  <OPTION selected=3D"<c:out =
value=3D"${obj.wheel2.id}"/>" value=3D"<c:out =
value=3D"${wheel.id}"/>"><c:out value=3D"${wheel.name}"/></OPTION>
         </c:if>
         <c:if test=3D"${obj.wheel2.id !=3D wheel.id}">
             <OPTION value=3D"<c:out value=3D"${wheel.id}"/>"><c:out =
value=3D"${wheel.name}"/></OPTION>
         </c:if>
            </c:forEach>
          </select>
        </td>
   </spring:bind>
</tr>

When a submit happens and Spring is going to update the values captured =
to the Bean, the two properties of the same type take the value of the =
first properties that is procesed in the bind algorithm, when the =
process finish the two properties get the same value, any help will be =
preciate. I already debugged some of the Spring code, and perhaps the =
problems is in the class "BeanWrapperImpl" method "setPropertyValue" =
when working with nested properties.

Best Regards, Rodney

Spring is really a powerfull framework, very good job, I already =
studying your samples and read documentation.