private int keyColumnEnd ( ) { int offset = 0 ; for ( int i = 0 ; i < _columns . length ; i ++ ) { if ( offset == _keyStart + _keyLength ) { return i ; } offset += _columns [ i ] . length ( ) ; } if ( offset == _keyStart + _keyLength ) { return _columns . length ; } throw new IllegalStateException ( ) ; }
End key column index the index after the final key .