Error in update Action

[Jan van Lit]

I am trying to create a 3-tier application as in Demo5.
I use Java 1.6 and tomcat 6. While testing I run into the problem with the next exception

java.lang.ClassCastException: [Ljava.lang.Object; cannot be cast to [Lorg.openswing.swing.message.receive.java.ValueObject;
        at net.vanlit.system.server.updateUserDetail.executeCommand(Unknown Source)

this error occurs in the next line in the update Action class
UserVO oldVO = (UserVO)((ValueObject[])inputPar)[0];

Anyone have an idea what I am doing wrong?

public final Response executeCommand(Object inputPar,UserSessionParameters userSessionPars,HttpServletRequest request, HttpServletResponse response,HttpSession userSession,ServletContext context) {
    Connection conn = null;

    try {
        conn = ConnectionManager.getConnection(context);
       
      HashMap map = new HashMap();
      map.put("userid","USR01.UID");
      map.put("passwd","USR01.passwd");
      map.put("email","USR01.email");
      map.put("name","USR01.name");
      map.put("language_id","USR01.language_id");

      HashSet pk = new HashSet();
      pk.add("userid");

      UserVO oldVO = (UserVO)((ValueObject[])inputPar)[0];
      UserVO newVO = (UserVO)((ValueObject[])inputPar)[1];
     
          return QueryUtil.updateTable(
          conn,
          userSessionPars,
          pk,
          (ValueObject)oldVO,
          (ValueObject)newVO,
          "USR01",
          map,
          "Y",
          "N",
          context,
          true
      );
    }

[Jan van Lit]

After doing several testing, I currently changed my code from 3-tier to 2-tier, which works at the moment. It is not as I want it, but it works for now.
I also switched from the form editor jiglo/eclipse to netbeans 6.5, because jiglo did not update properties as it should.
3rd I added some code generation to the Druid project here on sf.net to create the full VO for me, and added some code to create a table browser/editor with openSwing, which i will publish when it is ready.

[mcarniel]

It seems that the class cast exception depends on the wrong declaration of array: on client-side the array is declared of Object[] type and jvm throws an exception a class cast exception since the code attempts to cast Object[] to ValueObject[].
You should write:

UserVO oldVO = (UserVO)((Object[])inputPar)[0];