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 $nextId = 0;
24
25	/**
26	* make it a singleton
27	*/
28	protected function __construct()
29	{
30	}
31
32	public static function getInstance(): IntegerIdFactory
33	{
34	if (!isset(self::$instance)) {
35	self::$instance = new IntegerIdFactory();
36	}
37	return self::$instance;
38	}
39
40	/**
41	* setNextId
42	* @param non-negative-int $id
43	*
44	* @return void
45	*/
46	public function setNextId(int $id): void
47	{
48	if ($id < 0) {
49	throw new SetNextIdException();
50	}
51	self::$nextId = $id;
52	}
53
54	/**
55	* getNextId
56	* @return non-negative-int
57	*/
58	public static function getNextId(): int
59	{
60	return self::$nextId++;
61	}
62	}