Issues in ByPropertyIdStatementGrouper.php - New Issues - Inspection of "Add license (#181)" - wmde/WikibaseDataModelServices - Measure and Improve Code Quality continuously with Scrutinizer

Passed

Push — master ( aed585...26fb24 )

by no

created 2017-06-16 09:17 UTC

Statement/Grouper/ByPropertyIdStatementGrouper.php (1 issue)

Labels

Severity

Major 1

Upgrade to new PHP Analysis Engine

These results are based on our legacy PHP analysis, consider migrating to our new PHP analysis engine instead. Learn more

<?php

namespace Wikibase\DataModel\Services\Statement\Grouper;

use Wikibase\DataModel\Statement\StatementList;

/**
 * @since 3.2
 *
 * @license GPL-2.0+
 * @author Thiemo Mättig
 */
class ByPropertyIdStatementGrouper implements StatementGrouper {

	/**
	 * @param StatementList $statements
	 *
	 * @return StatementList[] An associative array, mapping property id serializations to
	 *  StatementList objects.
	 */
	public function groupStatements( StatementList $statements ) {
		/** @var StatementList[] $groups */
		$groups = [];

		foreach ( $statements->toArray() as $statement ) {
			$id = $statement->getPropertyId()->getSerialization();

			if ( !isset( $groups[$id] ) ) {
				$groups[$id] = new StatementList();
			}

			$groups[$id]->addStatement( $statement );
		}

		return $groups;
class Author {
    private $name;

    public function __construct($name) {
        $this->name = $name;
    }

    public function getName() {
        return $this->name;
    }
}

abstract class Post {
    public function getAuthor() {
        return 'Johannes';
    }
}

class BlogPost extends Post {
    public function getAuthor() {
        return new Author('Johannes');
    }
}

class ForumPost extends Post { /* ... */ }

function my_function(Post $post) {
    echo strtoupper($post->getAuthor());
}
	}

}


1		<?php
2
3		namespace Wikibase\DataModel\Services\Statement\Grouper;
4
5		use Wikibase\DataModel\Statement\StatementList;
6
7		/**
8		* @since 3.2
9		*
10		* @license GPL-2.0+
11		* @author Thiemo Mättig
12		*/
13		class ByPropertyIdStatementGrouper implements StatementGrouper {
14
15		/**
16		* @param StatementList $statements
17		*
18		* @return StatementList[] An associative array, mapping property id serializations to
19		* StatementList objects.
20		*/
21	1	public function groupStatements( StatementList $statements ) {
22		/** @var StatementList[] $groups */
23	1	$groups = [];
24
25	1	foreach ( $statements->toArray() as $statement ) {
26	1	$id = $statement->getPropertyId()->getSerialization();
27
28	1	if ( !isset( $groups[$id] ) ) {
29	1	$groups[$id] = new StatementList();
30	1	}
31
32	1	$groups[$id]->addStatement( $statement );
33	1	}
34
35	1	return $groups;
		0 ignored issues – show Bug Best Practice introduced 2017-06-01 13:07 UTC by Report Bug Copy Issue Report Show Similar Issues like this The return type of `return $groups;` (`array<,Wikibase\DataMod...tatement\StatementList>`) is incompatible with the return type declared by the interface `Wikibase\DataModel\Servi...rouper::groupStatements` of type `Wikibase\DataModel\Statement\StatementList[]`. If you return a value from a function or method, it should be a sub-type of the type that is given by the parent type f.e. an interface, or abstract method. This is more formally defined by the Lizkov substitution principle, and guarantees that classes that depend on the parent type can use any instance of a child type interchangably. This principle also belongs to the SOLID principles for object oriented design. Let’s take a look at an example: class Author { private $name; public function __construct($name) { $this->name = $name; } public function getName() { return $this->name; } } abstract class Post { public function getAuthor() { return 'Johannes'; } } class BlogPost extends Post { public function getAuthor() { return new Author('Johannes'); } } class ForumPost extends Post { / ... */ } function my_function(Post $post) { echo strtoupper($post->getAuthor()); } Our function `my_function` expects a `Post` object, and outputs the author of the post. The base class `Post` returns a simple string and outputting a simple string will work just fine. However, the child class `BlogPost` which is a sub-type of `Post` instead decided to return an `object`, and is therefore violating the SOLID principles. If a `BlogPost` were passed to `my_function`, PHP would not complain, but ultimately fail when executing the `strtoupper` call in its body. Loading history...
36		}
37
38		}
39

wmde / WikibaseDataModelServices

Push — master ( aed585...26fb24 )

Statement/Grouper/ByPropertyIdStatementGrouper.php (1 issue)

Labels

Severity

Introduced By

Upgrade to new PHP Analysis Engine

Duplication Side-by-Side

Filter issues like