Droplet.java

package nloc;

public class Droplet {
  private Position position;
  private DropletType type;

  public Droplet(DropletType type, Position position) {
    this.position = position;
    this.type = type;
    this.position.getChannel().addDroplet(this);
  }

  public void move() {
    position.increment(this);
  }

  public DropletType getType() {
    return type;
  }

  public Position getPosition() {
    return position;
  }

  public void setPosition(Position position) {
    this.position.getChannel().removeDroplet(this);
    this.position = position;
    this.position.getChannel().addDroplet(this);
  }

  public boolean isInSink() {
    return this.position.getChannel() instanceof Sink; 
  }
}