https://sourceforge.net/tracker/?func=detail&aid=2974251&group_id=152762&atid=785194

when i try to use the new ZK5 Fileupload component got this error:

java.rmi.server.UID is a restricted class. Please see the Google App Engine developer's guide for more details.

GAE don´t allow to use java.rmi.server.UID and it is used in

org.zkoss.zk.au.http.ZkFileItemFactory

//-- FileItemFactory --//
public FileItem createItem(String fieldName, String contentType,
boolean isFormField, String fileName) {
return new ZkFileItem(fieldName, contentType, isFormField, fileName,
getSizeThreshold(), getRepository());
}

it extends DiskFileItemFactory

org.apache.commons.fileupload.disk.DiskFileItemFactory

/**

• UID used in unique file name generation.
  */
  private static final String UID =
  new java.rmi.server.UID().toString()
  .replace(':', '').replace('-', '');

I mean GAE does not allow to create files in the remote server. The only way to upload to GAE is here

How do I handle multipart form data? or How do I handle file uploads to my app?
http://code.google.com/intl/en/appengine/kb/java.html#fileforms

My issue is to upload a file to ZK Window and record a ZK Image component with JDO