|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
namespace TreeHouse\Feeder\Reader; |
|
4
|
|
|
|
|
5
|
|
|
use Symfony\Component\HttpFoundation\ParameterBag; |
|
6
|
|
|
use TreeHouse\Feeder\Exception\EmptyResponseException; |
|
7
|
|
|
use TreeHouse\Feeder\Exception\ReadException; |
|
8
|
|
|
use TreeHouse\Feeder\Resource\ResourceInterface; |
|
9
|
|
|
|
|
10
|
|
|
class JsonLinesReader extends AbstractReader |
|
11
|
|
|
{ |
|
12
|
|
|
/** |
|
13
|
|
|
* @var \Iterator |
|
14
|
|
|
*/ |
|
15
|
|
|
protected $fileObject; |
|
16
|
|
|
|
|
17
|
|
|
/** |
|
18
|
|
|
* Serializes a read item into a ParameterBag. |
|
19
|
|
|
* |
|
20
|
|
|
* @param string $data |
|
21
|
|
|
* |
|
22
|
|
|
* @return ParameterBag |
|
23
|
|
|
* |
|
24
|
|
|
* @throws ReadException |
|
25
|
|
|
*/ |
|
26
|
6 |
|
protected function serialize($data) |
|
27
|
|
|
{ |
|
28
|
6 |
|
if ('' === trim($data)) { |
|
29
|
4 |
|
return null; |
|
30
|
|
|
} |
|
31
|
|
|
|
|
32
|
4 |
|
if (null === $result = json_decode($data, true)) { |
|
33
|
2 |
|
if (json_last_error() !== JSON_ERROR_NONE) { |
|
34
|
2 |
|
throw new ReadException(json_last_error_msg(), json_last_error()); |
|
35
|
|
|
} |
|
36
|
|
|
} |
|
37
|
|
|
|
|
38
|
2 |
|
return new ParameterBag($result); |
|
39
|
|
|
} |
|
40
|
|
|
|
|
41
|
|
|
/** |
|
42
|
|
|
* Creates a reader for a resource. |
|
43
|
|
|
* |
|
44
|
|
|
* @param ResourceInterface $resource |
|
45
|
|
|
*/ |
|
46
|
6 |
|
protected function createReader(ResourceInterface $resource) |
|
47
|
|
|
{ |
|
48
|
|
|
try { |
|
49
|
6 |
|
$jsonFile = $resource->getFile()->getPathname(); |
|
50
|
|
|
|
|
51
|
6 |
|
$this->fileObject = new \SplFileObject($jsonFile); |
|
52
|
6 |
|
} catch (EmptyResponseException $e) { |
|
53
|
|
|
// getting an empty response is not a problem for jsonlines files, this |
|
54
|
|
|
// just means that there are no records. |
|
55
|
|
|
$this->fileObject = new \ArrayIterator(); |
|
56
|
|
|
} |
|
57
|
6 |
|
} |
|
58
|
|
|
|
|
59
|
|
|
/** |
|
60
|
|
|
* @inheritdoc |
|
61
|
|
|
*/ |
|
62
|
|
|
protected function doKey() |
|
63
|
|
|
{ |
|
64
|
|
|
return $this->fileObject->key(); |
|
65
|
|
|
} |
|
66
|
|
|
|
|
67
|
|
|
/** |
|
68
|
|
|
* @inheritdoc |
|
69
|
|
|
*/ |
|
70
|
6 |
|
protected function doCurrent() |
|
71
|
|
|
{ |
|
72
|
6 |
|
return $this->fileObject->current(); |
|
73
|
|
|
} |
|
74
|
|
|
|
|
75
|
|
|
/** |
|
76
|
|
|
* @inheritdoc |
|
77
|
|
|
*/ |
|
78
|
6 |
|
protected function doNext() |
|
79
|
|
|
{ |
|
80
|
6 |
|
$this->fileObject->next(); |
|
81
|
6 |
|
} |
|
82
|
|
|
|
|
83
|
|
|
/** |
|
84
|
|
|
* @inheritdoc |
|
85
|
|
|
*/ |
|
86
|
6 |
|
protected function doValid() |
|
87
|
|
|
{ |
|
88
|
6 |
|
return $this->fileObject->valid(); |
|
89
|
|
|
} |
|
90
|
|
|
|
|
91
|
|
|
/** |
|
92
|
|
|
* @inheritdoc |
|
93
|
|
|
*/ |
|
94
|
|
|
protected function doRewind() |
|
95
|
|
|
{ |
|
96
|
|
|
$this->fileObject->rewind(); |
|
97
|
|
|
} |
|
98
|
|
|
} |
|
99
|
|
|
|
treehouselabs /
feeder
