public class ObjectWrapper {

    String objectId;
    String parenId;
    // getters + setters
}


main() {

    ArrayList<ObjectItSelf> objectList = new ArrayList<ObjectItSelf>();
    // Key is id of parent and value is list of its children
    HashMap<String,List<ObjecWraper>> parentMap = new HashMap<String,List<ObjectWrapper>>();
    // Each objectWrapper will be used for creating new ObjectItself object.
    // Every object has one parent and objects can have several children or none
    for(ObjectWrapper objectWraper : objectWraperList) {
    ObjectItSelf object = new ObjectItSelf();
    String parentId = objectWraper.getParentId();
    // We get new ID from sequence of database
    int newId = daoImpl.getNewId();
    object.setId(newId);
    objectList.add(object);
    // If there is parentId in map just add child to arraylist if no add parentId to map
    if(parentsMap.containsKey(parentId)){
        parentsMap.get(parentId).add(objectWraper );
    } else {
        List<ObjectWrapper > newChildList = new ArrayList<ObjectWrapper>();
        newChildList.add(objectWraper );
        parentsMap.put(parentId, newChildList);
    }
     }
     /* Here is problem. objectChildren objects have new ID which was generated from
      * sequence. But parent IDS was set from old object and in time when object were
      * created I could not now what would be the new id of parent. So lets saz that parent
      * had ID 1 then the new ID is 2. Problem is I am looking for object with new id(2) but
      * id in map is still 1
      */
     for(ObjectItSelf object : objectList) {
    List<ObjectItSelf > objectChildren= parentsMap.get(object .getId());
    ExtraRelationShipObject[] relationShipArray = new ExtraRelationShipObject[100]
    // for each object get its data and turn it into ExtraRelationShipObject
     }


}