FirstNodeSimplifier - Code Metrics - ProjetPP/PPP-LibModule-PHP - Measure and Improve Code Quality continuously with Scrutinizer

FirstNodeSimplifier A
last analyzed 2016-03-10 13:37 UTC

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Complexity

Total Complexity

Size/Duplication

Total Lines	45
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	4

Test Coverage

Coverage

100%

Importance

Changes	2
Bugs	1	Features	0

Metric	Value
wmc	6
c	2
b	1
f	0
lcom	1
cbo	4
dl	0
loc	45
ccs	16
cts	16
cp	1
rs	10

3 Methods

Rating	Name	Size	Complexity
A	__construct()	3	1
A	isSimplifierFor()	3	1
A	simplify()	19	4

<?php

namespace PPP\Module\TreeSimplifier;

use InvalidArgumentException;
use PPP\DataModel\AbstractNode;
use PPP\DataModel\FirstNode;
use PPP\DataModel\ResourceListNode;

/**
 * @licence MIT
 * @author Thomas Pellissier Tanon
 */
class FirstNodeSimplifier implements NodeSimplifier {

	/**
	 * @var NodeSimplifierFactory
	 */
	private $simplifierFactory;

	/**
	 * @param NodeSimplifierFactory $simplifierFactory
	 */
	public function __construct(NodeSimplifierFactory $simplifierFactory) {
		$this->simplifierFactory = $simplifierFactory;
	}

	/**
	 * @see NodeSimplifier::isSimplifierFor
	 */
	public function isSimplifierFor(AbstractNode $node) {
		return $node instanceof FirstNode;
	}

	/**
	 * @see NodeSimplifier::simplify
	 * @param FirstNode $node
	 */
	public function simplify(AbstractNode $node) {
		if(!$this->isSimplifierFor($node)) {
			throw new InvalidArgumentException('FirstNodeSimplifier can only simplify FirstNode');
		}

		$nodeSimplifier = $this->simplifierFactory->newNodeSimplifier();
		$operand = $nodeSimplifier->simplify($node->getOperand());
abstract class User
{
    /** @return string */
    abstract public function getPassword();
}

class MyUser extends User
{
    public function getPassword()
    {
        // return something
    }

    public function getDisplayName()
    {
        // return some name.
    }
}

class AuthSystem
{
    public function authenticate(User $user)
    {
        $this->logger->info(sprintf('Authenticating %s.', $user->getDisplayName()));
        // do something.
    }
}

		if($operand instanceof ResourceListNode) {
			if($operand->isEmpty()) {
				return $operand;
			} else {
				$resources = $operand->toArray();
				return new ResourceListNode(array(reset($resources)));
function acceptsInteger($int) { }

$x = '123'; // string "123"

// Instead of
acceptsInteger($x);

// we recommend to use
acceptsInteger((integer) $x);
			}
		} else {
			return new FirstNode($operand);
		}
	}
}


1		<?php
2
3		namespace PPP\Module\TreeSimplifier;
4
5		use InvalidArgumentException;
6		use PPP\DataModel\AbstractNode;
7		use PPP\DataModel\FirstNode;
8		use PPP\DataModel\ResourceListNode;
9
10		/**
11		* @licence MIT
12		* @author Thomas Pellissier Tanon
13		*/
14		class FirstNodeSimplifier implements NodeSimplifier {
15
16		/**
17		* @var NodeSimplifierFactory
18		*/
19		private $simplifierFactory;
20
21		/**
22		* @param NodeSimplifierFactory $simplifierFactory
23		*/
24	7	public function __construct(NodeSimplifierFactory $simplifierFactory) {
25	7	$this->simplifierFactory = $simplifierFactory;
26	7	}
27
28		/**
29		* @see NodeSimplifier::isSimplifierFor
30		*/
31	6	public function isSimplifierFor(AbstractNode $node) {
32	6	return $node instanceof FirstNode;
33		}
34
35		/**
36		* @see NodeSimplifier::simplify
37		* @param FirstNode $node
38		*/
39	4	public function simplify(AbstractNode $node) {
40	4	if(!$this->isSimplifierFor($node)) {
41	1	throw new InvalidArgumentException('FirstNodeSimplifier can only simplify FirstNode');
42		}
43
44	3	$nodeSimplifier = $this->simplifierFactory->newNodeSimplifier();
45	3	$operand = $nodeSimplifier->simplify($node->getOperand());
		0 ignored issues – show Bug introduced 2015-12-08 13:20 UTC by Report Bug Copy Issue Report It seems like you code against a specific sub-type and not the parent class `PPP\DataModel\AbstractNode` as the method `getOperand()` does only exist in the following sub-classes of `PPP\DataModel\AbstractNode`: `PPP\DataModel\FirstNode`, `PPP\DataModel\LastNode`, `PPP\DataModel\ReducerNode`, `PPP\DataModel\SortNode`. Maybe you want to `instanceof` check for one of these explicitly? Let’s take a look at an example: abstract class User { /** @return string / abstract public function getPassword(); } class MyUser extends User { public function getPassword() { // return something } public function getDisplayName() { // return some name. } } class AuthSystem { public function authenticate(User $user) { $this->logger->info(sprintf('Authenticating %s.', $user->getDisplayName())); // do something. } } In the above example, the authenticate() method works fine as long as you just pass instances of MyUser. However, if you now also want to pass a different sub-classes of User which does not have a getDisplayName() method, the code will break. Available Fixes Change the type-hint for the parameter: class AuthSystem { public function authenticate(MyUser $user) { / ... / } } Add an additional type-check: class AuthSystem { public function authenticate(User $user) { if ($user instanceof MyUser) { $this->logger->info(/* ... /); } // or alternatively if ( ! $user instanceof MyUser) { throw new \LogicException( '$user must be an instance of MyUser, ' .'other instances are not supported.' ); } } } Note:* PHP Analyzer uses reverse abstract interpretation to narrow down the types inside the if block in such a case. Add the method to the parent class: abstract class User { /** @return string / abstract public function getPassword(); /* @return string */ abstract public function getDisplayName(); } Loading history...
46
47	3	if($operand instanceof ResourceListNode) {
48	2	if($operand->isEmpty()) {
49	1	return $operand;
50		} else {
51	1	$resources = $operand->toArray();
52	1	return new ResourceListNode(array(reset($resources)));
		0 ignored issues – show Documentation introduced 2015-12-08 13:20 UTC by Report Bug Copy Issue Report `array(reset($resources))` is of type `array<integer,object<PPP...\ResourceNode>\|false"}>`, but the function expects a `array<integer,object<PPP...odel\ResourceListNode>>`. It seems like the type of the argument is not accepted by the function/method which you are calling. In some cases, in particular if PHP’s automatic type-juggling kicks in this might be fine. In other cases, however this might be a bug. We suggest to add an explicit type cast like in the following example: function acceptsInteger($int) { } $x = '123'; // string "123" // Instead of acceptsInteger($x); // we recommend to use acceptsInteger((integer) $x); Loading history...
53		}
54		} else {
55	1	return new FirstNode($operand);
56		}
57		}
58		}
59

ProjetPP / PPP-LibModule-PHP

FirstNodeSimplifier A last analyzed 2016-03-10 13:37 UTC

Complexity

Size/Duplication

Coupling/Cohesion

Test Coverage

Importance

3 Methods

Available Fixes

Duplication Side-by-Side

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FirstNodeSimplifier A
last analyzed 2016-03-10 13:37 UTC