/**
 * 
 */
package org.vamsas.objects.utils;
import java.util.Vector;

import org.vamsas.objects.core.*;
/**
 * Form, accessors and validation for ApplicationData references in
 * vamsas document.
 * TODO: LATER:extend XML Schema to properly validate against the same forms required by this class
 * TODO: implement methods for searching appData structure for particular combinations of client and user data
 * TODO: VAMSAS: URNS for appDatas are supposed to be unique, aren't they ?
 */
public class AppDataReference {
  static public Vector getAppDataReferences(VamsasDocument doc) {
    if ((doc!=null) && (doc.getApplicationDataCount()>0)) {
      Vector apdrefs = new Vector();
      ApplicationData[] appdatas = doc.getApplicationData();
      for (int q=0; q<appdatas.length; q++) {
        String refstring=appdatas[q].getDataReference();
        if (refstring!=null) 
          apdrefs.add(refstring);
        User users[] = appdatas[q].getUser();
        
        if (users!=null)
          for (int u=0; u<users.length; u++)
            refstring=users[u].getDataReference();
            if (refstring!=null)
              apdrefs.add(new String(refstring)); // avoid referencing.
      }
      if (apdrefs.size()>0)
        return apdrefs;
    }
    return null;
  }
}