/**
* @hibernate.class table="feedback_category"
* mutable="true" dynamic-update="true"
* @hibernate.jcs-cache usage="read-write"
*/
public class FeedbackCategory {
.....
/**
   * @return
   * @hibernate.bag inverse="true"
   * table="feedback_category"
   * lazy="false"
   * cascade="all"
   * order-by="position"
   * @hibernate.jcs-cache usage="read-write"
   * @hibernate.collection-key column="fee_category_id"
   * @hibernate.collection-one-to-many class="com.clearview.feedback.db.report.FeedbackCategory"
   */
  public List getChildren() {
    return children;
  }

  public void setChildren(List children) {
    this.children = children;
  }

   /**
   * @return
   * @hibernate.property column="position"
   * not-null="true"
   * unique="false"
   */
  public int getPosition() {
    return position;
  }

  public void setPosition(int position) {
    this.position = position;
  }
............
}

....
for (int i = 0; i < categories.size() && !isFound; i++) {
  FeedbackCategory category = (FeedbackCategory) categories.get(i);
  if (current.equals(category)) {
    if (isUp)
      movedCategory = (FeedbackCategory) categories.get(i - 1);
     else
       movedCategory = (FeedbackCategory) categories.get(i + 1);
     int position = movedCategory.getPosition();
     movedCategory.setPosition(current.getPosition());
     current.setPosition(position);
     isFound = true;
  }
}
if (isFound) {
  session.beginTransaction();
  session.saveOrUpdate(current);
  session.saveOrUpdate(movedCategory);
  if (current.getParent() != null) {
    session.saveOrUpdate(current.getParent());
  }
  session.commit();
}
...

/**
   * @return
   * @hibernate.bag inverse="true"
   * table="feedback_category"
   * lazy="false"
   * cascade="all"
   * order-by="position"
   * @hibernate.jcs-cache usage="read-write"
   * @hibernate.collection-key column="fee_category_id"
   * @hibernate.collection-one-to-many class="com.clearview.feedback.db.report.FeedbackCategory"
   */
  public List getChildren() {
    return children;
  }