Script - Change the author of the documents into folder

The script changes the author of all the documents into some folder and subfolder childs.

import com.openkm.bean.*;
import org.hibernate.Session;
import org.hibernate.Transaction;
import com.openkm.dao.HibernateUtil;
import org.hibernate.HibernateException;
import org.hibernate.Query;
import com.openkm.api.*;
 
class Util {
	public void changeAuthor(String uuid)  {
		String qsUUIDList = "select uuid from NodeDocument nf where nf.parent=:parent";
		Session session = null;
		Transaction tx = null;
		int value = 0;
		List uuidList = new ArrayList();

		try {
			// Get document by folder ( parent node is the folder uuid )
			session = HibernateUtil.getSessionFactory().openSession();
			tx = session.beginTransaction();
			Query q = session.createQuery(qsUUIDList).setCacheable(true);
			q.setString("parent", uuid);
			uuidList = q.list();

			// Change document versions author 
			for (String docUUID : uuidList) {
				// Document version ( parent node is the document uuid )
				q = session.createQuery("update NodeDocumentVersion set author=:author where parent=:parent");
				q.setString("parent", docUUID);
				q.setString("author", "newAuthor");
				q.executeUpdate();
				// Document first creation author ( uuid is the main node UUID in the node base )
				q = session.createQuery("update NodeBase set author=:author where uuid=:uuid");
				q.setString("uuid", docUUID);
				q.setString("author", "newAuthor");
				q.executeUpdate();
			}
			HibernateUtil.commit(tx);

		} catch (HibernateException e) {
			HibernateUtil.rollback(tx);
		} finally {
			HibernateUtil.close(session);
			}
		}

		public void renameDocumentsAuthorInFolder(String fldUuid) {
			changeAuthor(fldUuid);
			for (Folder fld : OKMFolder.getInstance().getChildren(null, fldUuid)) {
			renameDocumentsAuthorInFolder(fld.getUuid());
		}
	}
}
 
String fldUUID = OKMRepository.getInstance().getNodeUuid(null, "/okm:root/importOne");
Util util = new Util();
util.renameDocumentsAuthorInFolder(fldUUID);