|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
namespace Smoren\Containers\Structs; |
|
4
|
|
|
|
|
5
|
|
|
/** |
|
6
|
|
|
* Class LinkedListItem |
|
7
|
|
|
*/ |
|
8
|
|
|
class LinkedListItem |
|
9
|
|
|
{ |
|
10
|
|
|
/** |
|
11
|
|
|
* @var mixed data value |
|
12
|
|
|
*/ |
|
13
|
|
|
protected $data; |
|
14
|
|
|
/** |
|
15
|
|
|
* @var mixed|null extra data |
|
16
|
|
|
*/ |
|
17
|
|
|
protected $extra = null; |
|
18
|
|
|
/** |
|
19
|
|
|
* @var LinkedListItem|null previous element position |
|
20
|
|
|
*/ |
|
21
|
|
|
protected ?LinkedListItem $prev; |
|
22
|
|
|
/** |
|
23
|
|
|
* @var LinkedListItem|null next element position |
|
24
|
|
|
*/ |
|
25
|
|
|
protected ?LinkedListItem $next; |
|
26
|
|
|
|
|
27
|
|
|
/** |
|
28
|
|
|
* LinkedListItem constructor. |
|
29
|
|
|
* @param mixed $data data value |
|
30
|
|
|
* @param LinkedListItem|null $prev previous element position |
|
31
|
|
|
* @param LinkedListItem|null $next next element position |
|
32
|
|
|
* @param mixed $extra extra data |
|
33
|
|
|
*/ |
|
34
|
|
|
public function __construct($data, ?LinkedListItem $prev, ?LinkedListItem $next, $extra = null) |
|
35
|
|
|
{ |
|
36
|
|
|
$this->data = $data; |
|
37
|
|
|
$this->prev = $prev; |
|
38
|
|
|
$this->next = $next; |
|
39
|
|
|
$this->extra = $extra; |
|
40
|
|
|
} |
|
41
|
|
|
|
|
42
|
|
|
/** |
|
43
|
|
|
* Returns data value |
|
44
|
|
|
* @return mixed |
|
45
|
|
|
*/ |
|
46
|
|
|
public function getData() |
|
47
|
|
|
{ |
|
48
|
|
|
return $this->data; |
|
49
|
|
|
} |
|
50
|
|
|
|
|
51
|
|
|
/** |
|
52
|
|
|
* Sets data value |
|
53
|
|
|
* @param mixed $data data value |
|
54
|
|
|
* @return $this |
|
55
|
|
|
*/ |
|
56
|
|
|
public function setData($data): LinkedListItem |
|
57
|
|
|
{ |
|
58
|
|
|
$this->data = $data; |
|
59
|
|
|
return $this; |
|
60
|
|
|
} |
|
61
|
|
|
|
|
62
|
|
|
/** |
|
63
|
|
|
* Returns previous element position |
|
64
|
|
|
* @return LinkedListItem|null |
|
65
|
|
|
*/ |
|
66
|
|
|
public function getPrev(): ?LinkedListItem |
|
67
|
|
|
{ |
|
68
|
|
|
return $this->prev; |
|
69
|
|
|
} |
|
70
|
|
|
|
|
71
|
|
|
/** |
|
72
|
|
|
* Returns next element position |
|
73
|
|
|
* @return LinkedListItem|null |
|
74
|
|
|
*/ |
|
75
|
|
|
public function getNext(): ?LinkedListItem |
|
76
|
|
|
{ |
|
77
|
|
|
return $this->next; |
|
78
|
|
|
} |
|
79
|
|
|
|
|
80
|
|
|
/** |
|
81
|
|
|
* Sets previous element position |
|
82
|
|
|
* @param LinkedListItem|null $item previous element position |
|
83
|
|
|
* @return $this |
|
84
|
|
|
*/ |
|
85
|
|
|
public function setPrev(?LinkedListItem $item): self |
|
86
|
|
|
{ |
|
87
|
|
|
$this->prev = $item; |
|
88
|
|
|
return $this; |
|
89
|
|
|
} |
|
90
|
|
|
|
|
91
|
|
|
/** |
|
92
|
|
|
* Sets next element position |
|
93
|
|
|
* @param LinkedListItem|null $item |
|
94
|
|
|
* @return $this |
|
95
|
|
|
*/ |
|
96
|
|
|
public function setNext(?LinkedListItem $item): self |
|
97
|
|
|
{ |
|
98
|
|
|
$this->next = $item; |
|
99
|
|
|
return $this; |
|
100
|
|
|
} |
|
101
|
|
|
|
|
102
|
|
|
/** |
|
103
|
|
|
* Gets extra data |
|
104
|
|
|
* @return mixed|null |
|
105
|
|
|
*/ |
|
106
|
|
|
public function getExtra() |
|
107
|
|
|
{ |
|
108
|
|
|
return $this->extra; |
|
109
|
|
|
} |
|
110
|
|
|
|
|
111
|
|
|
/** |
|
112
|
|
|
* Sets extra data |
|
113
|
|
|
* @param mixed $extra extra data |
|
114
|
|
|
* @return $this |
|
115
|
|
|
*/ |
|
116
|
|
|
public function setExtra($extra): self |
|
117
|
|
|
{ |
|
118
|
|
|
$this->extra = $extra; |
|
119
|
|
|
return $this; |
|
120
|
|
|
} |
|
121
|
|
|
|
|
122
|
|
|
/** |
|
123
|
|
|
* Clones object |
|
124
|
|
|
*/ |
|
125
|
|
|
public function __clone() |
|
126
|
|
|
{ |
|
127
|
|
|
if(is_object($this->data)) { |
|
128
|
|
|
$this->data = clone $this->data; |
|
129
|
|
|
} |
|
130
|
|
|
|
|
131
|
|
|
if(is_object($this->extra)) { |
|
132
|
|
|
$this->extra = clone $this->extra; |
|
133
|
|
|
} |
|
134
|
|
|
|
|
135
|
|
|
$this->prev = null; |
|
136
|
|
|
$this->next = null; |
|
137
|
|
|
} |
|
138
|
|
|
} |
|
139
|
|
|
|
Smoren /
containers-php
