SharedBag.php
No OneTemporary
Actions

Size

974 B

Referenced Files

None

Subscribers

None

SharedBag.php
View Options

	<?php
	declare(strict_types=1);

	namespace Keruald\OmniTools\Collections;

	/**
	* A shared bag is a collection of key and values, which implements
	* a monostate pattern, i.e. there is only one bag, which can be accessed
	* though an arbitrary amount of SharedBag instances.
	*
	* The SharedBag class can be used as:
	* — shared context, to contain the application configuration
	* — service locator, to contain application dependencies
	* — a migration path to store global variables of a legacy application
	* pending the migration to a collection sharing the same interface
	*
	* Such patterns can be discouraged and as such used with architectural care,
	* as they mainly use SharedBag as global variables, or as an antipattern.
	*/
	class SharedBag {

	private static ?HashMap $bag = null;

	public function getBag() : HashMap {
	if (self::$bag === null) {
	self::$bag = new HashMap;
	}

	return self::$bag;
	}

	}