java call oracle procedure with %rowtype parameter

I have been given an oracle procedure with the in out parameter %rowtype,like:

CREATE OR REPLACE PROCEDURE cleansing(
       io_user IN OUT USER%rowtype
)
IS
BEGIN
  --some pl/sql code

END cleansing;

USER is a table with more than 100 columns, I want to call the procedure by Java. I can't change the procedure, because they are already used by other project. I can't add procedure to database, because I don't have the permission to do it. I google it, but can't find a good way to handle this. what I want to do is: 1. pass the parameter. 2. get the parameter. some java demo code:

String sql = "{call cleansing(?)}";
try {
    dbConnection = getDBConnection();
    callableStatement = dbConnection.prepareCall(sql);
    callableStatement.setXXX()//I don't know
    callableStatement.registerOUTParameter(1, //I don't know the type.);

can anyone help me and give some demo code? no change to database and in out parameter mapping with java

This is possible but it's not really straightforward. You have to create something of type USER%ROWTYPE at runtime and use that to call your stored procedure. Take a look here for details.

To get output values as well, you have to do something extra, along the line of Sumit's comment. Basically, after your procedure call, you open a cursor that selects the relevant data from the USER parameter.

So you get a database statement as follows (pseudocode):

string sql =
   "declare
        user_param user%rowtype;
    begin
        -- Set necessary parameters 
        user_param.col0 := :p0In;
        user_param.col1 := :p1In;
        ...

        -- Call procedure.
        cleansing(io_user => user_param);

        -- Read necessary output values into cursor.
        open :pOut for select user_param.col99 as col99
                              user_param.col98 as col98
                              ...
                       from dual;
    end;"

You call this entire statement the usual way, but you register a cursor out parameter (unfortunately, Java is a very long time ago for me so I'm not sure on the exact syntax).

callableStatement.registerOutParameter("pOut", OracleTypes.CURSOR);
...
callableStatement.execute();
...
ResultSet rs = (ResultSet) callableStatement.getObject("pOut");
// Read from result set.

EDIT: I turned this into a blogpost. Code examples are in C# but the idea is the same.