Saber-Factions/src/main/java/com/massivecraft/factions/util/LazyLocation.java

package com.massivecraft.factions.util;

import org.bukkit.Bukkit;
import org.bukkit.Location;
import org.bukkit.World;

import java.io.Serializable;

/*
 * This class provides a lazy-load Location, so that World doesn't need to be initialized
 * yet when an object of this class is created, only when the Location is first accessed.
 */

public class LazyLocation implements Serializable {
  private static final long serialVersionUID = - 6049901271320963314L;
  private transient Location location = null;
  private String worldName;
  private double x;
  private double y;
  private double z;
  private float pitch;
  private float yaw;

  public LazyLocation(Location loc) {
    setLocation(loc);
  }

  public LazyLocation(final String worldName, final double x, final double y, final double z) {
    this(worldName, x, y, z, 0, 0);
  }

  public LazyLocation(final String worldName, final double x, final double y, final double z, final float yaw, final float pitch) {
    this.worldName = worldName;
    this.x = x;
    this.y = y;
    this.z = z;
    this.yaw = yaw;
    this.pitch = pitch;
  }

  // This returns the actual Location
  public final Location getLocation() {
    // make sure Location is initialized before returning it
    initLocation();
    return location;
  }

  // change the Location
  public final void setLocation(Location loc) {
    this.location = loc;
    this.worldName = loc.getWorld().getName();
    this.x = loc.getX();
    this.y = loc.getY();
    this.z = loc.getZ();
    this.yaw = loc.getYaw();
    this.pitch = loc.getPitch();
  }


  // This initializes the Location
  private void initLocation() {
    // if location is already initialized, simply return
    if (location != null) {
      return;
    }

    // get World; hopefully it's initialized at this point
    World world = Bukkit.getWorld(worldName);
    if (world == null) {
      return;
    }

    // store the Location for future calls, and pass it on
    location = new Location(world, x, y, z, yaw, pitch);
  }


  public final String getWorldName() {
    return worldName;
  }

  public final double getX() {
    return x;
  }

  public final double getY() {
    return y;
  }

  public final double getZ() {
    return z;
  }

  public final double getPitch() {
    return pitch;
  }

  public final double getYaw() {
    return yaw;
  }
}