CompositionCollection::getMethods()   A
last analyzed

Complexity

Conditions 1
Paths 1

Size

Total Lines 4
Code Lines 2

Duplication

Lines 0
Ratio 0 %

Code Coverage

Tests 2
CRAP Score 1

Importance

Changes 1
Bugs 0 Features 0
Metric Value
c 1
b 0
f 0
dl 0
loc 4
ccs 2
cts 2
cp 1
rs 10
cc 1
eloc 2
nc 1
nop 0
crap 1
1
<?php
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/*
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 * This file is part of the ClassGeneration package.
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 *
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 * (c) Antonio Spinelli <[email protected]>
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 *
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 * For the full copyright and license information, please view the LICENSE
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 * file that was distributed with this source code.
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 */
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namespace ClassGeneration;
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use ClassGeneration\Collection\ArrayCollection;
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use ClassGeneration\Composition\MethodCollection as CompositionMethodCollection;
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use ClassGeneration\Composition\MethodInterface as CompositionMethodInterface;
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use ClassGeneration\Element\Tabbable;
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/**
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 * Property Collection ClassGeneration
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 * @author Antonio Spinelli <[email protected]>
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 */
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class CompositionCollection extends ArrayCollection implements Tabbable
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{
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    /**
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     * Tabulation Identity.
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     * @var int
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     */
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    protected $tabulation;
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    /**
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     * @var CompositionMethodCollection
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     */
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    protected $methods;
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    /**
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     * Initializes a new ArrayCollection.
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     *
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     * @param array $elements
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     */
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    public function __construct(array $elements = array())
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    {
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        $this->setTabulation(4);
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        $this->elements = $elements;
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        $this->methods = new CompositionMethodCollection();
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    }
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    /**
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     * {@inheritdoc}
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     */
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    public function getTabulation()
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    {
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        return $this->tabulation;
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    }
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    /**
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     * {@inheritdoc}
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     */
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    public function getTabulationFormatted()
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    {
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        return str_repeat(' ', $this->getTabulation());
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    }
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    /**
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     * @inheritdoc
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     */
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    public function setTabulation($tabulation)
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    {
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        $this->tabulation = (int)$tabulation;
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        return $this;
0 ignored issues
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Bug Best Practice introduced by
The return type of return $this; (ClassGeneration\CompositionCollection) is incompatible with the return type declared by the interface ClassGeneration\Element\Tabbable::setTabulation of type ClassGeneration\Element\ElementAbstract.

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.

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    }
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    /**
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     * Adds a new Composition at CompositionCollection.
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     *
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     * @param string $composition
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     *
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     * @return bool
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     */
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    public function add($composition)
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    {
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        if(!$this->contains($composition)){
0 ignored issues
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Coding Style introduced by
Expected 1 space after IF keyword; 0 found
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            parent::add($composition);
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        }
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        return true;
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    }
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    /**
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     * @param CompositionMethodInterface $method
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     * @return bool
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     */
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    public function addMethod(CompositionMethodInterface $method)
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    {
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        $this->addComposition($method->getTraitName());
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        return $this->getMethods()->add($method);
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    }
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    /**
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     * @return CompositionMethodCollection
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     */
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    public function getMethods()
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    {
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        return $this->methods;
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    }
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    /**
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     * @param CompositionMethodCollection $methods
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     * @return CompositionCollection
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     */
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    public function setMethods(CompositionMethodCollection $methods)
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    {
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        $this->methods = $methods;
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        return $this;
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    }
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    /**
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     * @param string $composition
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     * @return bool
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     */
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    public function addComposition($composition)
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    {
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        return $this->add($composition);
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    }
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    /**
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     * Parse the Composition Collection to string.
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     * @return string
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     */
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    public function toString()
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    {
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        if ($this->isEmpty()) {
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            return '';
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        }
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        $traitNames = $this->toArray();
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        $tabulationFormatted = $this->getTabulationFormatted();
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        $compositionMethods = ';' . PHP_EOL;
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        if (!$this->getMethods()->isEmpty()) {
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            $compositionMethods = ' ' . $this->getMethods()->toString();
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        }
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        return $tabulationFormatted . 'use ' . implode(', ', $traitNames) . $compositionMethods;
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    }
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}
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