Completed
Push — 1.x ( 1a8942...66a912 )
by Théo
01:11
created

SplDoublyLinkedListFilter::__construct()   A

Complexity

Conditions 1
Paths 1

Size

Total Lines 4
Code Lines 2

Duplication

Lines 0
Ratio 0 %

Importance

Changes 1
Bugs 0 Features 0
Metric Value
cc 1
eloc 2
c 1
b 0
f 0
nc 1
nop 1
dl 0
loc 4
rs 10
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<?php
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namespace DeepCopy\TypeFilter\Spl;
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use DeepCopy\DeepCopy;
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use DeepCopy\TypeFilter\TypeFilter;
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use SplDoublyLinkedList;
0 ignored issues
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Bug introduced by Théo FIDRY
This use statement conflicts with another class in this namespace, DeepCopy\TypeFilter\Spl\SplDoublyLinkedList.

Let’s assume that you have a directory layout like this:

.
|-- OtherDir
|   |-- Bar.php
|   `-- Foo.php
`-- SomeDir
    `-- Foo.php

and let’s assume the following content of Bar.php:

// Bar.php
namespace OtherDir;

use SomeDir\Foo; // This now conflicts the class OtherDir\Foo

If both files OtherDir/Foo.php and SomeDir/Foo.php are loaded in the same runtime, you will see a PHP error such as the following:

PHP Fatal error:  Cannot use SomeDir\Foo as Foo because the name is already in use in OtherDir/Foo.php

However, as OtherDir/Foo.php does not necessarily have to be loaded and the error is only triggered if it is loaded before OtherDir/Bar.php, this problem might go unnoticed for a while. In order to prevent this error from surfacing, you must import the namespace with a different alias:

// Bar.php
namespace OtherDir;

use SomeDir\Foo as SomeDirFoo; // There is no conflict anymore.
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/**
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 * @final
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 */
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class SplDoublyLinkedListFilter implements TypeFilter
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{
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    /**
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     * @var DeepCopy
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     */
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    private $deepCopy;
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    public function __construct(DeepCopy $deepCopy)
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    {
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        $this->deepCopy = $deepCopy;
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    }
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    /**
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     * {@inheritdoc}
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     */
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    public function apply($element)
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    {
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        $newElement = clone $element;
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        if ($element instanceof SplDoublyLinkedList) {
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            // Replace each element in the list with a deep copy of itself
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            for ($i = 1; $i <= $newElement->count(); $i++) {
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                $newElement->push($this->deepCopy->copy($newElement->shift()));
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            }
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        }
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        return $newElement;
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    }
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}
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