|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
/* |
|
4
|
|
|
* This file is part of YaEtl |
|
5
|
|
|
* (c) Fabrice de Stefanis / https://github.com/fab2s/YaEtl |
|
6
|
|
|
* This source file is licensed under the MIT license which you will |
|
7
|
|
|
* find in the LICENSE file or at https://opensource.org/licenses/MIT |
|
8
|
|
|
*/ |
|
9
|
|
|
|
|
10
|
|
|
namespace fab2s\YaEtl\Extractors; |
|
11
|
|
|
|
|
12
|
|
|
use fab2s\NodalFlow\Nodes\NodeAbstract; |
|
13
|
|
|
|
|
14
|
|
|
/** |
|
15
|
|
|
* Class ExtractorAbstract |
|
16
|
|
|
*/ |
|
17
|
|
|
abstract class ExtractorAbstract extends NodeAbstract implements ExtractorInterface |
|
18
|
|
|
{ |
|
19
|
|
|
/** |
|
20
|
|
|
* This is a Traversable |
|
21
|
|
|
* |
|
22
|
|
|
* @var bool |
|
23
|
|
|
*/ |
|
24
|
|
|
protected $isATraversable = true; |
|
25
|
|
|
|
|
26
|
|
|
/** |
|
27
|
|
|
* This is a returning value |
|
28
|
|
|
* |
|
29
|
|
|
* @var bool |
|
30
|
|
|
*/ |
|
31
|
|
|
protected $isAReturningVal = true; |
|
32
|
|
|
|
|
33
|
|
|
/** |
|
34
|
|
|
* This is not a Flow |
|
35
|
|
|
* |
|
36
|
|
|
* @var bool |
|
37
|
|
|
*/ |
|
38
|
|
|
protected $isAFlow = false; |
|
39
|
|
|
|
|
40
|
|
|
/** |
|
41
|
|
|
* @var array |
|
42
|
|
|
*/ |
|
43
|
|
|
protected $nodeIncrements = [ |
|
44
|
|
|
'num_records' => 'num_iterate', |
|
45
|
|
|
'num_extract' => 0, |
|
46
|
|
|
]; |
|
47
|
|
|
|
|
48
|
|
|
/** |
|
49
|
|
|
* @var int |
|
50
|
|
|
*/ |
|
51
|
|
|
protected $numExtracts = 0; |
|
52
|
|
|
|
|
53
|
|
|
/** |
|
54
|
|
|
* @var int |
|
55
|
|
|
*/ |
|
56
|
|
|
protected $numRecords = 0; |
|
57
|
|
|
|
|
58
|
|
|
/** |
|
59
|
|
|
* get the traversable to traverse within the Flow |
|
60
|
|
|
* |
|
61
|
|
|
* @param mixed $param |
|
62
|
|
|
* |
|
63
|
|
|
* @return iterable |
|
64
|
|
|
*/ |
|
65
|
|
|
public function getTraversable($param = null): iterable |
|
66
|
|
|
{ |
|
67
|
|
|
$this->bootNumExtracts(); |
|
68
|
|
|
while ($this->extract($param)) { |
|
69
|
|
|
++$this->numExtracts; |
|
70
|
|
|
foreach ($this->getExtracted() as $record) { |
|
71
|
|
|
++$this->numRecords; |
|
72
|
|
|
yield $record; |
|
73
|
|
|
} |
|
74
|
|
|
} |
|
75
|
|
|
} |
|
76
|
|
|
|
|
77
|
|
|
/** |
|
78
|
|
|
* Get number of records (at the end of the Flow's execution) |
|
79
|
|
|
* |
|
80
|
|
|
* @return int |
|
81
|
|
|
*/ |
|
82
|
|
|
public function getNumRecords(): int |
|
83
|
|
|
{ |
|
84
|
|
|
return $this->numRecords; |
|
85
|
|
|
} |
|
86
|
|
|
|
|
87
|
|
|
/** |
|
88
|
|
|
* Get number of records (at the end of the Flow's execution) |
|
89
|
|
|
* |
|
90
|
|
|
* @return int |
|
91
|
|
|
*/ |
|
92
|
|
|
public function getNumExtracts(): int |
|
93
|
|
|
{ |
|
94
|
|
|
return $this->numExtracts; |
|
95
|
|
|
} |
|
96
|
|
|
|
|
97
|
|
|
/** |
|
98
|
|
|
* @return $this |
|
99
|
|
|
*/ |
|
100
|
|
|
public function bootNumExtracts(): self |
|
101
|
|
|
{ |
|
102
|
|
|
$this->numExtracts = 0; |
|
103
|
|
|
$this->numRecords = 0; |
|
104
|
|
|
/** @var ExtractorInterface $this */ |
|
105
|
|
|
if ($carrier = $this->getCarrier()) { |
|
106
|
|
|
$nodeMap = &$carrier->getFlowMap()->getNodeStat($this->getId()); |
|
107
|
|
|
$nodeMap['num_extract'] = &$this->numExtracts; |
|
|
|
|
|
|
108
|
|
|
} |
|
109
|
|
|
|
|
110
|
|
|
return $this; |
|
111
|
|
|
} |
|
112
|
|
|
|
|
113
|
|
|
/** |
|
114
|
|
|
* return what was extracted during last call to extract |
|
115
|
|
|
* As single record must be a collection of one record |
|
116
|
|
|
* it can be more elegant to: |
|
117
|
|
|
* ` yield $record;` |
|
118
|
|
|
* rather than to: |
|
119
|
|
|
* ` return [$record];` |
|
120
|
|
|
* |
|
121
|
|
|
* @return iterable |
|
122
|
|
|
*/ |
|
123
|
|
|
abstract protected function getExtracted(): iterable; |
|
124
|
|
|
} |
|
125
|
|
|
|
fab2s /
YaEtl
Loading history...