wp-optimize / vendor / kriswallsmith / assetic / src / Assetic / Extension / Twig / ValueContainer.php

ValueContainer.php in WP-Optimize – Cache, Compress images, Minify & Clean database to boost page speed & performance 3.2.3, at vendor/kriswallsmith/assetic/src/Assetic/Extension/Twig/ValueContainer.php

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1	<?php
2
3	/*
4	* This file is part of the Assetic package, an OpenSky project.
5	*
6	* (c) 2010-2014 OpenSky Project Inc
7	*
8	* For the full copyright and license information, please view the LICENSE
9	* file that was distributed with this source code.
10	*/
11
12	namespace Assetic\Extension\Twig;
13
14	use Assetic\ValueSupplierInterface;
15
16	/**
17	* Container for values initialized lazily from a ValueSupplierInterface.
18	*
19	* @author Christophe Coevoet <[email protected]>
20	*/
21	class ValueContainer implements \ArrayAccess, \IteratorAggregate, \Countable
22	{
23	private $values;
24	private $valueSupplier;
25
26	public function __construct(ValueSupplierInterface $valueSupplier)
27	{
28	$this->valueSupplier = $valueSupplier;
29	}
30
31	public function offsetExists($offset)
32	{
33	$this->initialize();
34
35	return array_key_exists($offset, $this->values);
36	}
37
38	public function offsetGet($offset)
39	{
40	$this->initialize();
41
42	if (!array_key_exists($offset, $this->values)) {
43	throw new \OutOfRangeException(sprintf('The variable "%s" does not exist.', $offset));
44	}
45
46	return $this->values[$offset];
47	}
48
49	public function offsetSet($offset, $value)
50	{
51	throw new \BadMethodCallException('The ValueContainer is read-only.');
52	}
53
54	public function offsetUnset($offset)
55	{
56	throw new \BadMethodCallException('The ValueContainer is read-only.');
57	}
58
59	public function getIterator()
60	{
61	$this->initialize();
62
63	return new \ArrayIterator($this->values);
64	}
65
66	public function count()
67	{
68	$this->initialize();
69
70	return count($this->values);
71	}
72
73	private function initialize()
74	{
75	if (null === $this->values) {
76	$this->values = $this->valueSupplier->getValues();
77	}
78	}
79	}
80