java - Add Charsetprovider to the OJVM -

i need add new charsetprovider ojvm inside oracle 12c database.

i load class loadjava :

  loadjava -v -u user mynewcharsetproviderclass.jar 

my class go in oracle schema, direct method work. charsetprovider part not load serviceloader.

in pure java add in meta-inf/services , serviceloader load in oracle database java vm seem not work way. charsetprovider class not load. class work fine in pure java, use many years ago.

meta-inf/services : java.nio.charset.spi.charsetprovider content :

com.eric.newcharset.nio.charset.spi.newcharsetcharsetprovider 

code example inside database :

create or replace , compile java source named "myjavadbprocedure"  public class myjavadbprocedure {    public static string upcase(string text) {      string str;         try {             str = new string("ééeeaarrr".getbytes("windows-1252"), "newcharset");         } catch (exception ex) {             return ex.tostring();         }     return str;    }  }; 

when call it, t have java.io.unsupportedencodingexception : newcharset.