NLS issue in Java/PLSQL code [ using ROWID]

Question

I have NLS related question regarding the following scenario in Java/PLSQL code ::-
OracleResultSet ors = (OracleResultSet) stmt.executeQuery("select rowId from t where t.col = 'XX'");
// The above query could return multiple rowIds.
String strVal1 = null;
String strVal2 = null;
if(ors.next())
strVal1 = ors.getROWID(1).stringValue();
if(ors.next())
strVal2 = ors.getROWID(1).stringValue();
ArrayList strList = new ArrayList();
strList.add(strVal1);
strList.add(strVal2);
Now I need to pass a list of rowId's from Java to PLSQL function f().
oracle.sql.ARRAY rowListArr = convertArrayListToRowPointerList(strList, conn) ;
OracleCallableStatement cstmt = (OracleCallableStatement)
cstmt.prepareCall("begin f(?); end;");
cstmt.setObject(1, rowListArr);
cstmt.execute();
where:-
static oracle.sql.ARRAY convertArrayListToRowPointerList(ArrayList arr, Connection conn)
throws SQLException {
oracle.sql.ArrayDescriptor stDesc = ArrayDescriptor.createDescriptor
("DBUSER.ROWPOINTERLIST", conn);
oracle.sql.Datum[] keyVals= new oracle.sql.Datum[arr.size()];
for(int i = 0; i < arr.size(); i++) {
keyVals[i] = new oracle.sql.CHAR((String) arr.get(i),
oracle.sql.CHAR.DEFAULT_CHARSET);
oracle.sql.ARRAY keyArr = new oracle.sql.ARRAY(stDesc, conn, keyVals);
return keyArr;
and
create or replace type DBUSER.ROWPOINTERLIST as table of varchar2(4000);
Will there be NLS issues in the above code, where I pass the rowId content
that I obtain from one query, as array of string bind variables to a subsequent PLSQL procedure? --- first approach
Or
do I need to pass the rowId list , as a array of oracle.sql.ROWID via bind variables? -- second approach
The problem I have in second approach is that in the DB we cannot define a type as a table of ROWID's. So currently I have RowPointerList as a table of varchar2's (note the length of list of rowId is not predetermined in my case, so I user table instead of varray).
However I was wondering if the first approach will have any NLS issues.
Will appreciate your comments.
Thanks

Answer 1

ROWIDs are represented as either hex-encoded values or base64 encoded values. Both encodings use pure ASCII, so there should be no NLS issues.
I am not very familiar with the oracle.sql.ARRAY type, but unless absolutely necessary, I would avoid the oracle.sql.CHAR datatype (assuming 10g drivers). Using java.lang.String is preferred.
-- Sergiusz