Inserting tuples in a ResultSet without populating changes to the database

Question

Hello,
     After statement.executeQuery(A_SQL_STATEMENT), I got a ResultSet object, however, I want to insert many extra tuples into the final ResultSet before it being iterated and println() its content. I try the following possible solutions, but all of them have problems:
Possible solution 1:
rs.moveToInsertRow();
rs.updateString(...)
rs.insertRow();
PROBLEMS:
It will update the actual data content using insertRow();
Possible solution 2:
Extend the implementation Class of ResultSet and override the insertRow() functions so that it did not update the actual data content.
PROBLEMS:
I am using Oracle JDBC Drivers. I cannot get the source code for me to hack and extend the ResultSet implementation.
Possible solution 3:
Implement the java.sql.ResultSet interface by myself.
PROBLEMS:
Kill me, another solution?
Thanks for your help,
     Eric

Answer 1

Hi
I think Solution 2 with a twist will do...
Create a myResulSet class by extending Object and implements java.sql.ResultSet
Create a constructor that accepts a oracle.driver.OracleResultSet as a parameter and remove the default constructor
Map all method to use the passes oracle.driver.OracleResultSet object except for insertRow() where you can provide your own implementation ...
in your code when you say
oracle.jdbc.driver.OracleResultSet rs = statement.executeQuery("..");
Create myResultSet myRS = new mtResultSet( rs) ;
and use myRS for all operations ....
Though I am not sure I think its called as Delegation in oops terminology
hope this helps
Rupinder