blob: 9f2286d8100a8cb4ff0f571fd8fbb7ede67a2e65 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
|
<?php
namespace SMW\SQLStore\QueryEngine\DescriptionInterpreters;
use SMW\Query\Language\Conjunction;
use SMW\Query\Language\Description;
use SMW\Query\Language\Disjunction;
use SMW\SQLStore\QueryEngine\DescriptionInterpreter;
use SMW\SQLStore\QueryEngine\QuerySegment;
use SMW\SQLStore\QueryEngine\QuerySegmentListBuilder;
/**
* @license GNU GPL v2+
* @since 2.2
*
* @author Markus Krötzsch
* @author Jeroen De Dauw
* @author mwjames
*/
class DisjunctionConjunctionInterpreter implements DescriptionInterpreter {
/**
* @var QuerySegmentListBuilder
*/
private $querySegmentListBuilder;
/**
* @since 2.2
*
* @param QuerySegmentListBuilder $querySegmentListBuilder
*/
public function __construct( QuerySegmentListBuilder $querySegmentListBuilder ) {
$this->querySegmentListBuilder = $querySegmentListBuilder;
}
/**
* @since 2.2
*
* @return boolean
*/
public function canInterpretDescription( Description $description ) {
return $description instanceof Conjunction || $description instanceof Disjunction;
}
/**
* @since 2.2
*
* @param Description $description
*
* @return QuerySegment
*/
public function interpretDescription( Description $description ) {
$query = new QuerySegment();
$query->type = $description instanceof Conjunction ? QuerySegment::Q_CONJUNCTION : QuerySegment::Q_DISJUNCTION;
foreach ( $description->getDescriptions() as $subDescription ) {
$subQueryId = $this->querySegmentListBuilder->getQuerySegmentFrom( $subDescription );
if ( $subQueryId >= 0 ) {
$query->components[$subQueryId] = true;
}
}
// All subconditions failed, drop this as well.
if ( count( $query->components ) == 0 ) {
$query->type = QuerySegment::Q_NOQUERY;
}
return $query;
}
}
|
