how do i do query with 4 params?

     query.setFilter( "x > x1 && x < x2 && y > y1 && y < y2" );
      query.declareParameters( "int x1, int x2, int y1, int y2" );


      Object arr[] = new Integer[4];
      arr[0] = Integer.valueOf( x1 );
      arr[1] = Integer.valueOf( x2 );
      arr[2] = Integer.valueOf( y1 );
      arr[3] = Integer.valueOf( y2 );

      List<Location> results =
(List<Location>)query.executeWithArray( arr );

this gives me Exception

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