Code Coverage for I:\www\pvcStruct\src\types\id\IntegerIdFactory.php

1	<?php
2
3	/**
4	* @author: Doug Wilbourne (dougwilbourne@gmail.com)
5	*/
6
7	declare(strict_types=1);
8
9	namespace pvc\struct\types\id;
10
11	use pvc\struct\types\err\SetNextIdException;
12
13	/**
14	* Class NodeIdFactory
15	*/
16	class IntegerIdFactory
17	{
18	protected static IntegerIdFactory $instance;
19
20	/**
21	* @var non-negative-int
22	*/
23	protected static int $nextId = 0;
24
25	/**
26	* make it a singleton
27	*/
28	protected function __construct() {}
29
30	public static function getInstance(): IntegerIdFactory
31	{
32	if (!isset(self::$instance)) {
33	self::$instance = new IntegerIdFactory();
34	}
35	return self::$instance;
36	}
37
38	/**
39	* setNextId
40	* @param non-negative-int $id
41	*
42	* @return void
43	*/
44	public function setNextId(int $id): void
45	{
46	if ($id < 0) {
47	throw new SetNextIdException();
48	}
49	self::$nextId = $id;
50	}
51
52	/**
53	* getNextId
54	* @return non-negative-int
55	*/
56	public static function getNextId(): int
57	{
58	return self::$nextId++;
59	}
60	}