FormatterLocator.php
1.98 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
<?php
/**
*
* This file is part of the Aura Project for PHP.
*
* @package Aura.Intl
*
* @license http://opensource.org/licenses/bsd-license.php BSD
*
*/
namespace Aura\Intl;
/**
*
* A ServiceLocator implementation for loading and retaining formatter objects.
*
* @package Aura.Intl
*
*/
class FormatterLocator
{
/**
*
* A registry to retain formatter objects.
*
* @var array
*
*/
protected $registry;
/**
*
* Tracks whether or not a registry entry has been converted from a
* callable to a formatter object.
*
* @var array
*
*/
protected $converted = [];
/**
*
* Constructor.
*
* @param array $registry An array of key-value pairs where the key is the
* formatter name the value is a callable that returns a formatter object.
*
*/
public function __construct(array $registry = [])
{
foreach ($registry as $name => $spec) {
$this->set($name, $spec);
}
}
/**
*
* Sets a formatter into the registry by name.
*
* @param string $name The formatter name.
*
* @param callable $spec A callable that returns a formatter object.
*
* @return void
*
*/
public function set($name, $spec)
{
$this->registry[$name] = $spec;
$this->converted[$name] = false;
}
/**
*
* Gets a formatter from the registry by name.
*
* @param string $name The formatter to retrieve.
*
* @return FormatterInterface A formatter object.
*
*/
public function get($name)
{
if (! isset($this->registry[$name])) {
throw new Exception\FormatterNotMapped($name);
}
if (! $this->converted[$name]) {
$func = $this->registry[$name];
$this->registry[$name] = $func();
$this->converted[$name] = true;
}
return $this->registry[$name];
}
}