passing resultset as datasource to subreport

[wizir]

hello, i have a java code like

sql = "select * from product";
rs2 = db.execSQL(sql);
JRResultSetDataSource sDataSourceSub = new JRResultSetDataSource(rs2);

parameters.put("DATASOURCE", sDataSourceSub);

and how can i pass this parameter/datasource to subreport ???

i'll be appreciated for sample of code in ireport
thanks for help
best regards