Greetings,

I'm having trouble getting my List Shuttle to work. I'm using it to assign certain User Groups. On first invocation i always receive a faces-error message like this:

"Component j_id_jsp_488724587_1:shuttle has invalid value expression com.tqg.lcm.manager.modules.useradmin.UserGroupVO@134831a6"

When i switch back to my shuttle site and try the same action again everything works fine, it just occurs on the first invocation. I guess the problem is related to the overwriting of the hasCode() and equals() methods. I'm not very experienced with that and I used and adjusted the methods from the ListShuttle demo. Perhaps you can help me out ? Here is my Code:

My Bean (including the hashCode() and equals() methods):

package com.tqg.lcm.manager.modules.useradmin;

import java.io.Serializable;


public class UserGroupVO implements Serializable {
 protected long id;
 protected String groupname;
 protected String comment;
 protected String lastuser;
 protected String lastupdate;

 /* GETTERS AND SETTERS */


 public int hashCode() {
 final int prime = 31;
 int result = 1;
 result = prime * result + ((groupname == null) ? 0 : groupname.hashCode());
 result = prime * result + ((comment == null) ? 0 : comment.hashCode());
 result = prime * result + ((lastuser == null) ? 0 : lastuser.hashCode());
 result = prime * result + ((lastupdate == null) ? 0 : lastupdate.hashCode());
 result = prime * result + (int)id;
 return result;
 }

 public boolean equals(Object obj) {
 if (this == obj)
 return true;
 if (obj == null)
 return false;
 if (getClass() != obj.getClass())
 return false;
 UserGroupVO other = (UserGroupVO) obj;

 if (groupname == null) {
 if (other.groupname != null)
 return false;
 } else if (!groupname.equals(other.groupname))
 return false;
 if (comment == null) {
 if (other.comment != null)
 return false;
 } else if (!comment.equals(other.comment))
 return false;
 if (lastuser == null) {
 if (other.lastuser != null)
 return false;
 } else if (!lastuser.equals(other.lastuser))
 return false;
 if (lastupdate == null) {
 if (other.lastupdate != null)
 return false;
 } else if (!lastupdate.equals(other.lastupdate))
 return false;
 if (id != other.id)
 return false;
 return true;
 }



}

<rich:listShuttle var="item" id="shuttle"
 sourceListWidth="350" targetListWidth="350" listsHeight="310"
 converter="UserGroupConverter" orderControlsVisible="false"
 fastOrderControlsVisible="false"
 removeAllControlLabel="#{msg['shuttle.removeall']}"
 removeControlLabel="#{msg['shuttle.remove']}"
 copyAllControlLabel="#{msg['shuttle.copyall']}"
 copyControlLabel="#{msg['shuttle.copy']}"
 sourceCaptionLabel="#{msg['useradmin.usergroup.availableusergroups']}"
 targetCaptionLabel="#{msg['useradmin.usergroup.targetusergroups']}"
 sourceValue="#{userToUsergroupShuttle.sourceList}"
 targetValue="#{userToUsergroupShuttle.targetList}">
 <h:column>
 <f:facet name="header">
 <h:outputText value="#{msg['useradmin.usergroup']}" />
 </f:facet>
 <h:outputText value="#{item.groupname}" />
 </h:column>
 </rich:listShuttle>

package com.tqg.lcm.manager.modules.useradmin.converter;

import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.convert.Converter;
import javax.faces.convert.ConverterException;

import com.tqg.lcm.manager.modules.useradmin.UserAdminService;
import com.tqg.lcm.manager.modules.useradmin.UserGroupVO;

public class UserGroupConverter implements Converter {

 UserAdminService uas = new UserAdminService();

 public Object getAsObject(FacesContext ctx, UIComponent c, String value) {

 if (value == null) {
 return null;
 }

 UserGroupVO usergroup = uas.getUserGroupById(Long.parseLong(value));

 return usergroup;
 }

 public String getAsString(FacesContext ctx, UIComponent c, Object value) {

 if (value == null) {
 return null;
 }

 UserGroupVO usergroup = null;

 try {
 usergroup = (UserGroupVO) value;
 } catch (ClassCastException e) {
 throw new ConverterException("Could not cast to UserGroupVO");
 }

 String id = String.valueOf(usergroup.getId());
 return id;
 }

}