InterfaceDefinition::addExtendsInterfaceDefinition() - Code Metrics - Inspection of "Start to work on interface compilation" - ovr/phpsa - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#157)

by Kévin

created 2016-10-02 12:11 UTC

addExtendsInterfaceDefinition() A

↳ Parent: InterfaceDefinition

Complexity

Conditions	1
Paths	1

Size

Total Lines	4
Code Lines	2

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	0
CRAP Score	2

Importance

Changes	1
Bugs	0	Features	0

Metric	Value
cc	1
eloc	2
nc	1
nop	1
dl	0
loc	4
ccs	0
cts	3
cp	0
crap	2
rs	10
c	1
b	0
f	0

<?php
/**
 * @author Kévin Gomez https://github.com/K-Phoen <[email protected]>
 */

namespace PHPSA\Definition;

use PHPSA\CompiledExpression;
use PHPSA\Context;
use PhpParser\Node;
use PHPSA\Variable;
use PHPSA\Compiler\Event;

class InterfaceDefinition extends ParentDefinition
{
    /**
     * Class methods
     *
     * @var ClassMethod[]
     */
    protected $methods = [];

    /**
     * Class constants
     *
     * @var Node\Stmt\Const_[]
     */
    protected $constants = [];

    /**
     * @todo Use Finder
     *
     * @var string
     */
    protected $filepath;

    /**
     * @var Node\Stmt\Interface_|null
     */
    protected $statement;

    /**
     * @var string[]
     */
    protected $extendsInterfaces = [];

    /**
     * @var InterfaceDefinition[]
     */
    protected $extendsInterfacesDefinitions;


    /**
     * @param string $name
     * @param Node\Stmt\Interface_ $statement
     */
    public function __construct($name, Node\Stmt\Interface_ $statement = null)
    {
        $this->name = $name;
        $this->statement = $statement;
    }

    /**
     * @param ClassMethod $methodDefintion
     */
    public function addMethod(ClassMethod $methodDefintion)
    {
        $this->methods[$methodDefintion->getName()] = $methodDefintion;
    }

    /**
     * @param Node\Stmt\ClassConst $const
     */
    public function addConst(Node\Stmt\ClassConst $const)
    {
        $this->constants[$const->consts[0]->name] = $const;
    }

    /**
     * @param Context $context
     * @return $this
     */
    public function compile(Context $context)
    {
        if ($this->compiled) {
            return $this;
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());
}
        }

        $context->getEventManager()->fire(
            Event\StatementBeforeCompile::EVENT_NAME,
            new Event\StatementBeforeCompile($this->statement, $context)
/** @return stdClass|null */
function mayReturnNull() { }

function doesNotAcceptNull(stdClass $x) { }

// With potential error.
function withoutCheck() {
    $x = mayReturnNull();
    doesNotAcceptNull($x); // Potential error here.
}

// Safe - Alternative 1
function withCheck1() {
    $x = mayReturnNull();
    if ( ! $x instanceof stdClass) {
        throw new \LogicException('$x must be defined.');
    }
    doesNotAcceptNull($x);
}

// Safe - Alternative 2
function withCheck2() {
    $x = mayReturnNull();
    if ($x instanceof stdClass) {
        doesNotAcceptNull($x);
    }
}
        );

        $this->compiled = true;
        $context->setFilepath($this->filepath);
        $context->setScope($this);

        // Compile event for constants
        foreach ($this->constants as $const) {
            $context->getEventManager()->fire(
                Event\StatementBeforeCompile::EVENT_NAME,
                new Event\StatementBeforeCompile($const, $context)
            );
        }

        // Compile each method
        foreach ($this->methods as $method) {
            $context->clearSymbols();

            if (!$method->isStatic()) {
                $thisPtr = new Variable('this', $this, CompiledExpression::OBJECT);
                $thisPtr->incGets();
                $context->addVariable($thisPtr);
            }

            $method->compile($context);
        }

        return $this;
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());
}
    }

    /**
     * @return bool
     */
    public function isAbstract()
    {
        return true;
    }

    /**
     * @param string $name
     * @param boolean|false $inherit
     * @return bool
     */
    public function hasMethod($name, $inherit = false)
    {
        if (isset($this->methods[$name])) {
            return true;
        }

        if (!$inherit) {
            return false;
        }

        /** @var InterfaceDefinition $interfacesDefinition */
        foreach ($this->extendsInterfacesDefinitions as $interfacesDefinition) {
            if ($interfacesDefinition->hasMethod($name, true)) {
                return true;
            }
        }

        return false;
    }

    /**
     * @param string $name
     * @param bool $inherit
     * @return bool
     */
    public function hasConst($name, $inherit = false)
    {
        if (isset($this->constants[$name])) {
            return true;
        }

        if ($inherit) {
            foreach ($this->extendsInterfacesDefinitions as $interface) {
                if ($interface->hasConst($name, true)) {
                    return true;
                }
            }
        }

        return false;
    }

    /**
     * @param string $name
     * @param boolean|false $inherit
     * @return ClassMethod|null
     */
    public function getMethod($name, $inherit = false)
    {
        if (isset($this->methods[$name])) {
            return $this->methods[$name];
        }

        if ($inherit) {
            foreach ($this->extendsInterfacesDefinitions as $interface) {
                if ($method = $interface->getMethod($name, true)) {
                    return $method;
                }
            }
        }

        return null;
    }

    /**
     * @return string
     */
    public function getFilepath()
    {
        return $this->filepath;
    }

    /**
     * @param string $filepath
     */
    public function setFilepath($filepath)
    {
        $this->filepath = $filepath;
    }

    /**
     * @return string[]
     */
    public function getExtendsInterface()
    {
        return $this->extendsInterfaces;
    }

    /**
     * @param string $interfaceName
     */
    public function addExtendsInterface($interfaceName)
    {
        $this->extendsInterfaces[] = $interfaceName;
    }

    /**
     * @param InterfaceDefinition $interfaceDefinition
     */
    public function addExtendsInterfaceDefinition(InterfaceDefinition $interfaceDefinition)
    {
        $this->extendsInterfacesDefinitions[$interfaceDefinition->getName()] = $interfaceDefinition;
    }
}


1			<?php
2			/**
3			* @author Kévin Gomez https://github.com/K-Phoen <[email protected]>
4			*/
5
6			namespace PHPSA\Definition;
7
8			use PHPSA\CompiledExpression;
9			use PHPSA\Context;
10			use PhpParser\Node;
11			use PHPSA\Variable;
12			use PHPSA\Compiler\Event;
13
14			class InterfaceDefinition extends ParentDefinition
15			{
16			/**
17			* Class methods
18			*
19			* @var ClassMethod[]
20			*/
21			protected $methods = [];
22
23			/**
24			* Class constants
25			*
26			* @var Node\Stmt\Const_[]
27			*/
28			protected $constants = [];
29
30			/**
31			* @todo Use Finder
32			*
33			* @var string
34			*/
35			protected $filepath;
36
37			/**
38			* @var Node\Stmt\Interface_\|null
39			*/
40			protected $statement;
41
42			/**
43			* @var string[]
44			*/
45			protected $extendsInterfaces = [];
46
47			/**
48			* @var InterfaceDefinition[]
49			*/
50			protected $extendsInterfacesDefinitions;
			0 ignored issues – show Comprehensibility Naming introduced 2016-10-02 12:14 UTC by Report Bug Copy Issue Report The variable name `$extendsInterfacesDefinitions` exceeds the maximum configured length of `20`. Very long variable names usually make code harder to read. It is therefore recommended not to make variable names too verbose. Loading history...
51
52			/**
53			* @param string $name
54			* @param Node\Stmt\Interface_ $statement
55			*/
56			public function __construct($name, Node\Stmt\Interface_ $statement = null)
57			{
58			$this->name = $name;
59			$this->statement = $statement;
60			}
61
62			/**
63			* @param ClassMethod $methodDefintion
64			*/
65			public function addMethod(ClassMethod $methodDefintion)
66			{
67			$this->methods[$methodDefintion->getName()] = $methodDefintion;
68			}
69
70			/**
71			* @param Node\Stmt\ClassConst $const
72			*/
73			public function addConst(Node\Stmt\ClassConst $const)
74			{
75			$this->constants[$const->consts[0]->name] = $const;
76			}
77
78			/**
79			* @param Context $context
80			* @return $this
81			*/
82			public function compile(Context $context)
83			{
84			if ($this->compiled) {
85			return $this;
			0 ignored issues – show Bug Best Practice introduced 2016-10-02 12:14 UTC by Report Bug Copy Issue Report The return type of `return $this;` (`PHPSA\Definition\InterfaceDefinition`) is incompatible with the return type declared by the abstract method `PHPSA\Definition\AbstractDefinition::compile` of type `boolean`. 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...
86			}
87
88			$context->getEventManager()->fire(
89			Event\StatementBeforeCompile::EVENT_NAME,
90			new Event\StatementBeforeCompile($this->statement, $context)
			0 ignored issues – show Bug introduced 2016-10-02 12:14 UTC by Report Bug Copy Issue Report It seems like `$this->statement` can be `null`; however, `__construct()` does not accept `null`, maybe add an additional type check? Unless you are absolutely sure that the expression can never be null because of other conditions, we strongly recommend to add an additional type check to your code: /** @return stdClass\|null */ function mayReturnNull() { } function doesNotAcceptNull(stdClass $x) { } // With potential error. function withoutCheck() { $x = mayReturnNull(); doesNotAcceptNull($x); // Potential error here. } // Safe - Alternative 1 function withCheck1() { $x = mayReturnNull(); if ( ! $x instanceof stdClass) { throw new \LogicException('$x must be defined.'); } doesNotAcceptNull($x); } // Safe - Alternative 2 function withCheck2() { $x = mayReturnNull(); if ($x instanceof stdClass) { doesNotAcceptNull($x); } } Loading history...
91			);
92
93			$this->compiled = true;
94			$context->setFilepath($this->filepath);
95			$context->setScope($this);
96
97			// Compile event for constants
98			foreach ($this->constants as $const) {
99			$context->getEventManager()->fire(
100			Event\StatementBeforeCompile::EVENT_NAME,
101			new Event\StatementBeforeCompile($const, $context)
102			);
103			}
104
105			// Compile each method
106			foreach ($this->methods as $method) {
107			$context->clearSymbols();
108
109			if (!$method->isStatic()) {
110			$thisPtr = new Variable('this', $this, CompiledExpression::OBJECT);
111			$thisPtr->incGets();
112			$context->addVariable($thisPtr);
113			}
114
115			$method->compile($context);
116			}
117
118			return $this;
			0 ignored issues – show Bug Best Practice introduced 2016-10-02 12:14 UTC by Report Bug Copy Issue Report The return type of `return $this;` (`PHPSA\Definition\InterfaceDefinition`) is incompatible with the return type declared by the abstract method `PHPSA\Definition\AbstractDefinition::compile` of type `boolean`. 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...
119			}
120
121			/**
122			* @return bool
123			*/
124			public function isAbstract()
125			{
126			return true;
127			}
128
129			/**
130			* @param string $name
131			* @param boolean\|false $inherit
132			* @return bool
133			*/
134			public function hasMethod($name, $inherit = false)
135			{
136			if (isset($this->methods[$name])) {
137			return true;
138			}
139
140			if (!$inherit) {
141			return false;
142			}
143
144			/** @var InterfaceDefinition $interfacesDefinition */
145			foreach ($this->extendsInterfacesDefinitions as $interfacesDefinition) {
146			if ($interfacesDefinition->hasMethod($name, true)) {
147			return true;
148			}
149			}
150
151			return false;
152			}
153
154			/**
155			* @param string $name
156			* @param bool $inherit
157			* @return bool
158			*/
159			public function hasConst($name, $inherit = false)
160			{
161			if (isset($this->constants[$name])) {
162			return true;
163			}
164
165			if ($inherit) {
166			foreach ($this->extendsInterfacesDefinitions as $interface) {
167			if ($interface->hasConst($name, true)) {
168			return true;
169			}
170			}
171			}
172
173			return false;
174			}
175
176			/**
177			* @param string $name
178			* @param boolean\|false $inherit
179			* @return ClassMethod\|null
180			*/
181			public function getMethod($name, $inherit = false)
182			{
183			if (isset($this->methods[$name])) {
184			return $this->methods[$name];
185			}
186
187			if ($inherit) {
188			foreach ($this->extendsInterfacesDefinitions as $interface) {
189			if ($method = $interface->getMethod($name, true)) {
190			return $method;
191			}
192			}
193			}
194
195			return null;
196			}
197
198			/**
199			* @return string
200			*/
201			public function getFilepath()
202			{
203			return $this->filepath;
204			}
205
206			/**
207			* @param string $filepath
208			*/
209			public function setFilepath($filepath)
210			{
211			$this->filepath = $filepath;
212			}
213
214			/**
215			* @return string[]
216			*/
217			public function getExtendsInterface()
218			{
219			return $this->extendsInterfaces;
220			}
221
222			/**
223			* @param string $interfaceName
224			*/
225			public function addExtendsInterface($interfaceName)
226			{
227			$this->extendsInterfaces[] = $interfaceName;
228			}
229
230			/**
231			* @param InterfaceDefinition $interfaceDefinition
232			*/
233			public function addExtendsInterfaceDefinition(InterfaceDefinition $interfaceDefinition)
234			{
235			$this->extendsInterfacesDefinitions[$interfaceDefinition->getName()] = $interfaceDefinition;
236			}
237			}
238

ovr / phpsa

Pull Request — master (#157)

addExtendsInterfaceDefinition() A

Complexity

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Duplication

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