MutableSphere.java

package me.stieglmaier.sphereMiners.model.util;

import javafx.scene.paint.Color;
import me.stieglmaier.sphereMiners.main.Constants;
import me.stieglmaier.sphereMiners.model.ai.Player;

/**
 * Be careful sphere is a mutable class. Only an
 * immutable view should be passed to AIs.
 *
 */
public class MutableSphere implements Sphere {

  private final Constants constants;
  private Position position;
  private Position direction = new Position();
  private int size;
  private Color color;
  private final Player owner;

  /**
   * Creatae a new Mutable sphere with the relevant constants
   *
   * @param owner the player who owns this sphere
   * @param constants the constants to use for this sphere
   */
  public MutableSphere(Constants constants, Player owner) {
    this.constants = constants;
    this.owner = owner;
    size = constants.getInitialSphereSize();
  }

  /**
   * Creatae a new Mutable sphere with the relevant constants
   *
   * @param owner the player who owns this sphere
   * @param constants the constants to use for this sphere
   */
  public MutableSphere(Constants constants) {
    this.constants = constants;
    this.owner = null;
    size = constants.getInitialSphereSize();
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public Player getOwner() {
    return owner;
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public void setDirection(Position direction) {
    this.direction = direction;
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public Position getDirection() {
    return direction;
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public void setPosition(Position position) {
    this.position = position;
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public Position getPosition() {
    return position;
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public double getRadius() {
    return Math.sqrt(size / Math.PI);
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public Color getColor() {
    return color;
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public void setColor(Color color) {
    this.color = color;
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public void setSize(int size) {
    this.size = size;
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public int getSize() {
    return this.size;
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public MutableSphere split() {
    if (size >= constants.getMinSplittingsize()) {
      MutableSphere newSphere = new MutableSphere(constants, owner);
      newSphere.size = size / 2;
      newSphere.direction = direction;
      newSphere.position = position;
      size = (size + 1) / 2;
      return newSphere;

    } else {
      return null;
    }
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public void merge(Sphere sphere) {
    if (canBeMergedWidth(sphere)) {
      size += sphere.getSize();
      sphere.setSize(0);
    }
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public boolean canBeMergedWidth(Sphere otherSphere) {
    return position.dist(otherSphere.getPosition()) - (getRadius() + otherSphere.getRadius())
            <= constants.getMinMergeDist()
        // TODO more constraints on size?
        && size > otherSphere.getSize();
  }

  /**
   * Create an immutable view of this sphere object.
   *
   * @return an immutable view of the sphere
   */
  public Sphere toImmutableSphere() {
    return new ImmutableSphere(this);
  }

  /**
   * Creates an immutable copy of this sphere object.
   *
   * @return an immutable copy of this sphere
   */
  public Sphere immutableCopy() {
    MutableSphere newSphere = new MutableSphere(constants, owner);
    newSphere.size = size;
    newSphere.direction = direction;
    newSphere.position = position;
    newSphere.color = color;
    return newSphere.toImmutableSphere();
  }

  /**
   * {@inheritDoc}
   */
  public String toString() {
    return "Sphere (" + size + ") at " + position;
  }

  private static class ImmutableSphere implements Sphere {
    Sphere sphere;

    private ImmutableSphere(Sphere sphere) {
      this.sphere = sphere;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public Player getOwner() {
      return sphere.getOwner();
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public Position getDirection() {
      return sphere.getDirection();
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public Position getPosition() {
      return sphere.getPosition();
    }

    /**
     * {@inheritDoc}
     */
    public double getRadius() {
      return sphere.getRadius();
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public int getSize() {
      return sphere.getSize();
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public Color getColor() {
      return sphere.getColor();
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void setColor(Color color) {
      throw new UnsupportedOperationException("This object is immutable!");
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void setSize(int size) {
      throw new UnsupportedOperationException("This object is immutable!");
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void setDirection(Position direction) {
      throw new UnsupportedOperationException("This object is immutable!");
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void setPosition(Position position) {
      throw new UnsupportedOperationException("This object is immutable!");
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public MutableSphere split() {
      throw new UnsupportedOperationException("This object is immutable!");
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void merge(Sphere sphere) {
      throw new UnsupportedOperationException("This object is immutable!");
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public boolean canBeMergedWidth(Sphere sphere2) {
      return sphere.canBeMergedWidth(sphere2);
    }

    public String toString() {
      return "Sphere (" + sphere.getSize() + ") at " + sphere.getPosition();
    }
  }
}