<?php

namespace JustCoded\WP\Framework\Objects;

/**

* Class Singleton

* Singleton design pattern base class

*/

trait Singleton {

/**

* Returns the *Singleton* current class.

*

* @return Singleton A single instance of this class.

*/

public static function instance() {

static $instance = null;

return $instance ?: $instance = new static();

}

/**

* Protected constructor to prevent creating a new instance of the

* *Singleton* via the `new` operator from outside of this class.

*/

protected function __construct() {

}

/**

* Private clone method to prevent cloning of the instance of the

* *Singleton* instance.

*

* @return void

*/

final public function __clone() {

throw new \RuntimeException(static::class . ' is singleton and cannot be cloned/serialized.');

}

/**

* Private unserialize method to prevent unserializing of the *Singleton*

* instance.

*

* @return void

*/

final public function __wakeup() {

throw new \RuntimeException(static::class . ' is singleton and cannot be cloned/serialized.');

}

}