public AccountCleaner(Database database) 
{
		this.database = database;
}

 public  void fixCreditFlags() 
{
		Rows rows = database.select( "SELECT account, balance, credit FROM accounts" );
		database.start();
		while( rows.hasNext() ) {
			long account = rows.getLong( "account" );
			long balance = rows.getLong( "balance" );
			boolean credit = rows.getBoolean( "credit" );
			if ( balance <  0 && credit ) {
				database.execute( "UPDATE accounts SET credit = false WHERE account = " + account );
			}
			else if ( balance  >= 0 && ! credit ) {
				database.execute( "UPDATE accounts SET credit = true WHERE account = " + account );
			}
		}
		database.commit();
}