|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
namespace SilverStripe\Core\Manifest; |
|
4
|
|
|
|
|
5
|
|
|
use SilverStripe\Core\ClassInfo; |
|
6
|
|
|
use SilverStripe\Dev\Deprecation; |
|
7
|
|
|
|
|
8
|
|
|
/** |
|
9
|
|
|
* A class that handles loading classes and interfaces from a class manifest |
|
10
|
|
|
* instance. |
|
11
|
|
|
*/ |
|
12
|
|
|
class ClassLoader |
|
13
|
|
|
{ |
|
14
|
|
|
|
|
15
|
|
|
/** |
|
16
|
|
|
* @internal |
|
17
|
|
|
* @var ClassLoader |
|
18
|
|
|
*/ |
|
19
|
|
|
private static $instance; |
|
20
|
|
|
|
|
21
|
|
|
/** |
|
22
|
|
|
* @var array Map of 'instance' (ClassManifest) and other options. |
|
23
|
|
|
*/ |
|
24
|
|
|
protected $manifests = array(); |
|
25
|
|
|
|
|
26
|
|
|
/** |
|
27
|
|
|
* @return ClassLoader |
|
28
|
|
|
*/ |
|
29
|
|
|
public static function inst() |
|
30
|
|
|
{ |
|
31
|
|
|
return self::$instance ? self::$instance : self::$instance = new self(); |
|
32
|
|
|
} |
|
33
|
|
|
|
|
34
|
|
|
/** |
|
35
|
|
|
* Returns the currently active class manifest instance that is used for |
|
36
|
|
|
* loading classes. |
|
37
|
|
|
* |
|
38
|
|
|
* @return ClassManifest |
|
39
|
|
|
*/ |
|
40
|
|
|
public function getManifest() |
|
41
|
|
|
{ |
|
42
|
|
|
return $this->manifests[count($this->manifests) - 1]['instance']; |
|
43
|
|
|
} |
|
44
|
|
|
|
|
45
|
|
|
/** |
|
46
|
|
|
* Returns true if this class loader has a manifest. |
|
47
|
|
|
*/ |
|
48
|
|
|
public function hasManifest() |
|
49
|
|
|
{ |
|
50
|
|
|
return (bool)$this->manifests; |
|
51
|
|
|
} |
|
52
|
|
|
|
|
53
|
|
|
/** |
|
54
|
|
|
* Pushes a class manifest instance onto the top of the stack. |
|
55
|
|
|
* |
|
56
|
|
|
* @param ClassManifest $manifest |
|
57
|
|
|
* @param bool $exclusive Marks the manifest as exclusive. If set to FALSE, will |
|
58
|
|
|
* look for classes in earlier manifests as well. |
|
59
|
|
|
*/ |
|
60
|
|
|
public function pushManifest(ClassManifest $manifest, $exclusive = true) |
|
61
|
|
|
{ |
|
62
|
|
|
$this->manifests[] = array('exclusive' => $exclusive, 'instance' => $manifest); |
|
63
|
|
|
} |
|
64
|
|
|
|
|
65
|
|
|
/** |
|
66
|
|
|
* @return ClassManifest |
|
67
|
|
|
*/ |
|
68
|
|
|
public function popManifest() |
|
69
|
|
|
{ |
|
70
|
|
|
$manifest = array_pop($this->manifests); |
|
71
|
|
|
return $manifest['instance']; |
|
72
|
|
|
} |
|
73
|
|
|
|
|
74
|
|
|
public function registerAutoloader() |
|
75
|
|
|
{ |
|
76
|
|
|
spl_autoload_register(array($this, 'loadClass')); |
|
77
|
|
|
} |
|
78
|
|
|
|
|
79
|
|
|
/** |
|
80
|
|
|
* Loads a class or interface if it is present in the currently active |
|
81
|
|
|
* manifest. |
|
82
|
|
|
* |
|
83
|
|
|
* @param string $class |
|
84
|
|
|
* @return String |
|
85
|
|
|
*/ |
|
86
|
|
|
public function loadClass($class) |
|
87
|
|
|
{ |
|
88
|
|
|
if ($path = $this->getItemPath($class)) { |
|
89
|
|
|
require_once $path; |
|
90
|
|
|
} |
|
91
|
|
|
return $path; |
|
92
|
|
|
} |
|
93
|
|
|
|
|
94
|
|
|
/** |
|
95
|
|
|
* Returns the path for a class or interface in the currently active manifest, |
|
96
|
|
|
* or any previous ones if later manifests aren't set to "exclusive". |
|
97
|
|
|
* |
|
98
|
|
|
* @param string $class |
|
99
|
|
|
* @return string|false |
|
100
|
|
|
*/ |
|
101
|
|
|
public function getItemPath($class) |
|
102
|
|
|
{ |
|
103
|
|
|
foreach (array_reverse($this->manifests) as $manifest) { |
|
104
|
|
|
/** @var ClassManifest $manifestInst */ |
|
105
|
|
|
$manifestInst = $manifest['instance']; |
|
106
|
|
|
if ($path = $manifestInst->getItemPath($class)) { |
|
107
|
|
|
return $path; |
|
108
|
|
|
} |
|
109
|
|
|
if ($manifest['exclusive']) { |
|
110
|
|
|
break; |
|
111
|
|
|
} |
|
112
|
|
|
} |
|
113
|
|
|
return false; |
|
114
|
|
|
} |
|
115
|
|
|
|
|
116
|
|
|
/** |
|
117
|
|
|
* Returns true if a class or interface name exists in the manifest. |
|
118
|
|
|
* |
|
119
|
|
|
* @param string $class |
|
120
|
|
|
* @return bool |
|
121
|
|
|
*/ |
|
122
|
|
|
public function classExists($class) |
|
123
|
|
|
{ |
|
124
|
|
|
Deprecation::notice('4.0', 'Use ClassInfo::exists.'); |
|
125
|
|
|
return ClassInfo::exists($class); |
|
126
|
|
|
} |
|
127
|
|
|
} |
|
128
|
|
|
|
silverstripe /
silverstripe-framework
