create or replace and compile java source named "LongUtil" as
import oracle.jdbc.OracleDriver;

import java.io.BufferedInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.sql.Blob;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;

public class LongUtil {

  public static void blob2LongRaw(Blob blob)
    throws SQLException, IOException {

    Connection con = null;
    PreparedStatement pst = null;
    try {
      con = new OracleDriver().defaultConnection();

      pst = con.prepareStatement(
        "insert into TEST_LONG (test_long_id, lrdata) values (SQ_TEST_LONG.nextval, ?)"
      );

      InputStream in = null;
      try {
        in = new BufferedInputStream(blob.getBinaryStream());
        pst.setBinaryStream(1, in, (int) blob.length());
        pst.execute();
      } finally {
        if (in != null) {in.close();}
      }
    } finally {
      if (pst != null) {pst.close();}
      if (con != null) {con.close();}
    }
  }
}
/