CS计算机代考程序代写 package parser;

package parser;

/**
* This class represents the pointer.
*
*
*/
public class Pointer {
public Position position;
public Direction direction;
public boolean isPenDown;

public Pointer(Position position, Direction direction, boolean isPenDown) {
this.position = position;
this.direction = direction;
this.isPenDown = isPenDown;
}

/**
* Turn the pointer to its left
* @return this pointer
*/
public Pointer turnLeft() {
switch(direction) {
case NORTH:
direction = Direction.WEST;
break;
case WEST:
direction = Direction.SOUTH;
break;
case SOUTH:
direction = Direction.EAST;
break;
case EAST:
direction = Direction.NORTH;
break;
}

return this;
}

/**
* Turn the pointer to its right
* @return this pointer
*/
public Pointer turnRight() {
switch(direction) {
case NORTH:
direction = Direction.EAST;
break;
case EAST:
direction = Direction.SOUTH;
break;
case SOUTH:
direction = Direction.WEST;
break;
case WEST:
direction = Direction.NORTH;
break;
}

return this;
}
}