notifier / libraries / action-scheduler / lib / cron-expression / CronExpression_FieldFactory.php

CronExpression_FieldFactory.php in WANotifier for Forms and Actions 3.1.1, at libraries/action-scheduler/lib/cron-expression/CronExpression_FieldFactory.php

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1	<?php
2
3	/**
4	* CRON field factory implementing a flyweight factory
5	*
6	* @author Michael Dowling <mtdowling@gmail.com>
7	* @link http://en.wikipedia.org/wiki/Cron
8	*/
9	class CronExpression_FieldFactory
10	{
11	/**
12	* @var array Cache of instantiated fields
13	*/
14	private $fields = array();
15
16	/**
17	* Get an instance of a field object for a cron expression position
18	*
19	* @param int $position CRON expression position value to retrieve
20	*
21	* @return CronExpression_FieldInterface
22	* @throws InvalidArgumentException if a position is not valid
23	*/
24	public function getField($position)
25	{
26	if (!isset($this->fields[$position])) {
27	switch ($position) {
28	case 0:
29	$this->fields[$position] = new CronExpression_MinutesField();
30	break;
31	case 1:
32	$this->fields[$position] = new CronExpression_HoursField();
33	break;
34	case 2:
35	$this->fields[$position] = new CronExpression_DayOfMonthField();
36	break;
37	case 3:
38	$this->fields[$position] = new CronExpression_MonthField();
39	break;
40	case 4:
41	$this->fields[$position] = new CronExpression_DayOfWeekField();
42	break;
43	case 5:
44	$this->fields[$position] = new CronExpression_YearField();
45	break;
46	default:
47	throw new InvalidArgumentException(
48	$position . ' is not a valid position'
49	);
50	}
51	}
52
53	return $this->fields[$position];
54	}
55	}
56