procedural-vs-OOP/src/main/java/de/hsfulda/pmuw/oop/NeighborPosition.java

package de.hsfulda.pmuw.oop;

public enum NeighborPosition {
  NORTH(-1, 0), 
  SOUTH(1, 0), 
  EAST(0, 1), 
  WEST(0, -1),
  NORTH_EAST(-1, 1), 
  SOUTH_EAST(1, 1), 
  SOUTH_WEST(1, -1), 
  NORTH_WEST(-1, -1);

  private final int rowOffset;
  private final int columnOffset;

  NeighborPosition(int rowOffset, int columnOffset) {
    this.rowOffset = rowOffset;
    this.columnOffset = columnOffset;
  }

  int getIndex(int row, int column, int rowSize) {
    return (((row + rowOffset) * rowSize) + column + columnOffset);
  }
}