|
1
|
|
|
<?php |
|
2
|
|
|
/** |
|
3
|
|
|
* @link http://www.yiiframework.com/ |
|
4
|
|
|
* @copyright Copyright (c) 2008 Yii Software LLC |
|
5
|
|
|
* @license http://www.yiiframework.com/license/ |
|
6
|
|
|
*/ |
|
7
|
|
|
|
|
8
|
|
|
namespace yii\caching; |
|
9
|
|
|
|
|
10
|
|
|
/** |
|
11
|
|
|
* ChainedDependency represents a dependency which is composed of a list of other dependencies. |
|
12
|
|
|
* |
|
13
|
|
|
* When [[dependOnAll]] is true, if any of the dependencies has changed, this dependency is |
|
14
|
|
|
* considered changed; When [[dependOnAll]] is false, if one of the dependencies has NOT changed, |
|
15
|
|
|
* this dependency is considered NOT changed. |
|
16
|
|
|
* |
|
17
|
|
|
* For more details and usage information on Cache, see the [guide article on caching](guide:caching-overview). |
|
18
|
|
|
* |
|
19
|
|
|
* @author Qiang Xue <[email protected]> |
|
20
|
|
|
* @since 2.0 |
|
21
|
|
|
*/ |
|
22
|
|
|
class ChainedDependency extends Dependency |
|
23
|
|
|
{ |
|
24
|
|
|
/** |
|
25
|
|
|
* @var Dependency[] list of dependencies that this dependency is composed of. |
|
26
|
|
|
* Each array element must be a dependency object. |
|
27
|
|
|
*/ |
|
28
|
|
|
public $dependencies = []; |
|
29
|
|
|
/** |
|
30
|
|
|
* @var bool whether this dependency is depending on every dependency in [[dependencies]]. |
|
31
|
|
|
* Defaults to true, meaning if any of the dependencies has changed, this dependency is considered changed. |
|
32
|
|
|
* When it is set false, it means if one of the dependencies has NOT changed, this dependency |
|
33
|
|
|
* is considered NOT changed. |
|
34
|
|
|
*/ |
|
35
|
|
|
public $dependOnAll = true; |
|
36
|
|
|
|
|
37
|
|
|
|
|
38
|
|
|
/** |
|
39
|
|
|
* Evaluates the dependency by generating and saving the data related with dependency. |
|
40
|
|
|
* @param Cache $cache the cache component that is currently evaluating this dependency |
|
41
|
|
|
*/ |
|
42
|
|
|
public function evaluateDependency($cache) |
|
43
|
|
|
{ |
|
44
|
|
|
foreach ($this->dependencies as $dependency) { |
|
45
|
|
|
$dependency->evaluateDependency($cache); |
|
46
|
|
|
} |
|
47
|
|
|
} |
|
48
|
|
|
|
|
49
|
|
|
/** |
|
50
|
|
|
* Generates the data needed to determine if dependency has been changed. |
|
51
|
|
|
* This method does nothing in this class. |
|
52
|
|
|
* @param Cache $cache the cache component that is currently evaluating this dependency |
|
53
|
|
|
* @return mixed the data needed to determine if dependency has been changed. |
|
54
|
|
|
*/ |
|
55
|
|
|
protected function generateDependencyData($cache) |
|
56
|
|
|
{ |
|
57
|
|
|
return null; |
|
58
|
|
|
} |
|
59
|
|
|
|
|
60
|
|
|
/** |
|
61
|
|
|
* @inheritdoc |
|
62
|
|
|
*/ |
|
63
|
|
|
public function isChanged($cache) |
|
64
|
|
|
{ |
|
65
|
|
|
foreach ($this->dependencies as $dependency) { |
|
66
|
|
|
if ($this->dependOnAll && $dependency->isChanged($cache)) { |
|
67
|
|
|
return true; |
|
68
|
|
|
} elseif (!$this->dependOnAll && !$dependency->isChanged($cache)) { |
|
69
|
|
|
return false; |
|
70
|
|
|
} |
|
71
|
|
|
} |
|
72
|
|
|
return !$this->dependOnAll; |
|
73
|
|
|
} |
|
74
|
|
|
} |
|
75
|
|
|
|
yiisoft /
yii2
