SQL & PL/SQL

I am trying to use STRUCT for the insertion of massive data in my table DATA_TABLE, but generate error (java.sql.SQLException: Fail to convert to internal representation) with data type field CLOB and I can't find a solution to my problem, my code:

My table

CREATE TABLE DATA_TABLE (DAT_ID NUMBER,
                         DAT_CODE VARCHAR2(10),
                         DAT_TEXT CLOB);

My type object

CREATE OR REPLACE TYPE TY_OBJ_DATA AS OBJECT (DAT_ID NUMBER,
                                              DAT_CODE VARCHAR2(10),
                                              DAT_TEXT CLOB); 

My type table from type object

CREATE OR REPLACE TYPE TY_TABLE_DATA AS TABLE OF SCHEMA.TY_OBJ_DATA;

My procedure

PROCEDURE pl_bulk_data(tyTableData IN OUT ty_table_data) IS 
   TYPE t_array_elements IS TABLE OF schema.data_table %rowtype INDEX BY BINARY_INTEGER;
   l_data t_array_elements;
   
   PRAGMA AUTONOMOUS_TRANSACTION;
   
   CURSOR curData IS
   SELECT dat_id, dat_code, dat_text 
     FROM TABLE(tyTableData);
     
BEGIN
   
   OPEN curData;
       LOOP
          FETCH curData BULK COLLECT INTO l_data LIMIT 100;
          FORALL i IN 1..l_data.COUNT
          INSERT INTO schema.data_table VALUES l_data(i);
          EXIT WHEN curData%notfound;
       END LOOP;
   CLOSE curData;
   
   COMMIT;
   
END pl_bulk_data;

My simplified java method

public static void bulkData(List<DataTable> listDataInfo) throws Exception {
  DataSource ds = (DataSource) getEntityManager().getEntityManagerFactory().getProperties().get("javax.persistence.jtaDataSource");
  OracleConnection connection = ds.getConnection().unwrap(OracleConnection.class);
  try{   
     StructDescriptor typeTableObject = StructDescriptor.createDescriptor("SCHEMA.TY_OBJ_DATA", conect);
     STRUCT[] structData = new STRUCT[DataTable.size()];
     int counter= 0;
     for (DataTable d : listDataInfo) {
          Clob clob = connection.createClob();
          STRUCT m = new STRUCT(typeTableObject, connection,
                     new Object[]{d.getDatId(),
                                  d.getDatCode,
                                  clob.setString(1, d.getDatText)});
                     structData [counter++] = m;
         }
      ArrayDescriptor tyTable = ArrayDescriptor.createDescriptor("SCHEMA.TY_TABLE_DATA", connection);
      ARRAY array = new ARRAY(tyTable, connection, structData);
      String sqlQuery = "{ CALL PACKAGE_BULK.PL_BULK_DATA }";
      CallableStatement cst = conect.prepareCall(sqlQuery);
      cst.setArray(1, array );
      cst.execute();
   } catch (Exception e) {
       throw new Exception(e);
   } finally {
     try {
      connection.close();
   } catch (SQLException e) {
     throw new Exception(e);
   }
   }

}

i Use ojdbc6 version 11.2.0, java 8 and Oracle Database 12c Enterprise Edition Release 12.2.0.1.0 - 64bit.

Question: Is it possible to use STRUCT with fields of type CLOB? I am doing something wrong? my DatText field when it is remapped is of the String type and that was the best conversion that I managed to do from String to a clob but I still have problems, he tried without the conversion to clob and I have the same error. Any idea how I can solve this? Thank you.