How to get result of querry independet of a datatype?

Question

Hi All!
I try to write a program, that calls stored procedures in a database independent of a name and arguments list. To get a result of a query I must call one of the functions getInt(), getString() etc. of CallableStatement. I'd like to write a wrap function, for instance getResult(), that get the result independent of the result's type. Has anybody any idea, how I can do it?
Any help will be appreciate.
Regards,
Andrej.

Answer 1

Hi Justin,
Even we have been writing a kind of these generic methods to send a query to database, fetch the Resultset and then populate an ArrayList with the Resultset data.
What do you get out of this ?
-> Less code to maintain
-> Single point of access to datasource
-> JDBC Code reuse
i agree that it might cost some cpu cycles in populating an ArrayList and then doing the casting again. But isn't it worth all the above credits.
An example of such a method is
  public ArrayList execute( String query, ArrayList params )
                throws SQLException {
    Connection con = null; // Database Connection object
    ArrayList rowset = new ArrayList();
    try {
      // Get the Database Connection
      con = connector.getConnection();
      // Use PreparedStatement object to execute the SQL Query
      PreparedStatement pst = con.prepareStatement( query );
      // Bind the columns values from the ArrayList object
      if( params != null ) {
        for( int i = 0; i < params.size(); i++ ) {
          pst.setObject( i + 1, params.get( i ) );
      // Execute the Query to get the ResultSet object
      ResultSet rst = pst.executeQuery();
      // Get column count from ResultSet Metadata
      int colCount = rsmtdt.getColumnCount();  // This may not be the correct syntax
      // Populate ArrayList
      while(rset.next()) {
        ArrayList row = new ArrayList();
     for(int i=1;i<=colCount;i++)
       row.add(rset.getObject(i);
     rowset.add(row);
      // Close the ResultSet and Statement
      rst.close();
      pst.close();
    } catch( SQLException ex ) {
      throw new DBException( "Unable to execute the SQL Query in execute "+
                                 "method of DBBroker class of given status " +
                             " : " + ex.getMessage() );
    } catch( Exception ex ) {
      throw new DBException( "Exception thrown in execute() method of " +
                             "DBBroker class of given status : " +
                              ex.getMessage() );
    } finally {
      try {
        connector.releaseConnection( con ); // Releases the connection
      } catch( DBConException ex ) {
        throw new DBException( "Unable to release the connection of given " +
                               "status : " + ex.getMessage() );
    return rowset;
  }Regards
Elango.