Runtime::getState() - Code Metrics - Inspection of "Add more opcodes support and implement basic vm" - railt/sdl - Measure and Improve Code Quality continuously with Scrutinizer

Test Failed

Push — master ( ecd78b...d05c81 )

by Kirill

created 2018-08-25 04:51 UTC

Runtime::getState() A

↳ Parent: Runtime

Complexity

Conditions	2
Paths	2

Size

Total Lines

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
cc	2
nc	2
nop	1
dl	0
loc	11
rs	9.9
c	0
b	0
f	0

<?php
/**
 * This file is part of Railt package.
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */
declare(strict_types=1);

namespace Railt\SDL\Backend;

use Railt\Io\Readable;
use Railt\Reflection\Contracts\Reflection;
use Railt\SDL\Backend\State\OpenState;
use Railt\SDL\Backend\State\StateInterface;
use Railt\SDL\Exception\VmException;
use Railt\SDL\Frontend\IR\JoinedOpcode;
use Railt\SDL\Frontend\IR\OpcodeInterface;

/**
 * Class Runtime
 */
class Runtime
{
    /**
     * @var string[]|StateInterface[]
     */
    private const RESOLVERS = [
        OpcodeInterface::RL_OPEN => OpenState::class,
    ];

    /**
     * @var array
     */
    private $result = [];

    /**
     * @var Readable
     */
    private $input;

    /**
     * @var Reflection
     */
    private $root;

    /**
     * Runtime constructor.
     * @param Reflection $root
     * @param Readable $input
     */
    public function __construct(Reflection $root, Readable $input)
    {
        $this->input = $input;
        $this->root = $root;
    }

    /**
     * @return Readable
     */
    public function getInput(): Readable
    {
        return $this->input;
    }

    /**
     * @param int $id
     * @return mixed|null
     */
    public function get(int $id)
    {
        return $this->result[$id] ?? null;
    }

    /**
     * @return Reflection
     */
    public function getReflection(): Reflection
    {
        return $this->root;
    }

    /**
     * @param iterable|OpcodeInterface[]|JoinedOpcode[] $opcodes
     * @return iterable
     * @throws \Railt\Io\Exception\ExternalFileException
     */
    public function execute(iterable $opcodes): iterable
    {
        foreach ($opcodes as $opcode) {
            yield $opcode => $this->result[$opcode->getId()] = $this->getState($opcode)->resolve($opcode);
        }
    }

    /**
     * @param OpcodeInterface|JoinedOpcode $opcode
     * @return StateInterface
     * @throws \Railt\Io\Exception\ExternalFileException
     */
    private function getState(OpcodeInterface $opcode): StateInterface
    {
        $state = self::RESOLVERS[$opcode->getOperation()] ?? null;

        if ($state === null) {
            $error = 'Unrecognized opcode (#%d) %s';
            throw new VmException($opcode, $error, $opcode->getId(), $opcode->getName());
interface User
{
    /** @return string */
    public function getPassword();
}

class MyUser implements 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.
    }
}
        }

        return new $state($this);
    }
}


1			<?php
2			/**
3			* This file is part of Railt package.
4			*
5			* For the full copyright and license information, please view the LICENSE
6			* file that was distributed with this source code.
7			*/
8			declare(strict_types=1);
9
10			namespace Railt\SDL\Backend;
11
12			use Railt\Io\Readable;
13			use Railt\Reflection\Contracts\Reflection;
14			use Railt\SDL\Backend\State\OpenState;
15			use Railt\SDL\Backend\State\StateInterface;
16			use Railt\SDL\Exception\VmException;
17			use Railt\SDL\Frontend\IR\JoinedOpcode;
18			use Railt\SDL\Frontend\IR\OpcodeInterface;
19
20			/**
21			* Class Runtime
22			*/
23			class Runtime
24			{
25			/**
26			* @var string[]\|StateInterface[]
27			*/
28			private const RESOLVERS = [
29			OpcodeInterface::RL_OPEN => OpenState::class,
30			];
31
32			/**
33			* @var array
34			*/
35			private $result = [];
36
37			/**
38			* @var Readable
39			*/
40			private $input;
41
42			/**
43			* @var Reflection
44			*/
45			private $root;
46
47			/**
48			* Runtime constructor.
49			* @param Reflection $root
50			* @param Readable $input
51			*/
52			public function __construct(Reflection $root, Readable $input)
53			{
54			$this->input = $input;
55			$this->root = $root;
56			}
57
58			/**
59			* @return Readable
60			*/
61			public function getInput(): Readable
62			{
63			return $this->input;
64			}
65
66			/**
67			* @param int $id
68			* @return mixed\|null
69			*/
70			public function get(int $id)
71			{
72			return $this->result[$id] ?? null;
73			}
74
75			/**
76			* @return Reflection
77			*/
78			public function getReflection(): Reflection
79			{
80			return $this->root;
81			}
82
83			/**
84			* @param iterable\|OpcodeInterface[]\|JoinedOpcode[] $opcodes
85			* @return iterable
86			* @throws \Railt\Io\Exception\ExternalFileException
87			*/
88			public function execute(iterable $opcodes): iterable
89			{
90			foreach ($opcodes as $opcode) {
91			yield $opcode => $this->result[$opcode->getId()] = $this->getState($opcode)->resolve($opcode);
92			}
93			}
94
95			/**
96			* @param OpcodeInterface\|JoinedOpcode $opcode
97			* @return StateInterface
98			* @throws \Railt\Io\Exception\ExternalFileException
99			*/
100			private function getState(OpcodeInterface $opcode): StateInterface
101			{
102			$state = self::RESOLVERS[$opcode->getOperation()] ?? null;
103
104			if ($state === null) {
105			$error = 'Unrecognized opcode (#%d) %s';
106			throw new VmException($opcode, $error, $opcode->getId(), $opcode->getName());
			0 ignored issues – show Bug introduced 2018-08-25 04:54 UTC by Report Bug Copy Issue Report It seems like you code against a concrete implementation and not the interface `Railt\SDL\Frontend\IR\OpcodeInterface` as the method `getId()` does only exist in the following implementations of said interface: `Railt\SDL\Frontend\IR\JoinedOpcode`. Let’s take a look at an example: interface User { /** @return string / public function getPassword(); } class MyUser implements 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 implementation 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 interface: interface User { /** @return string / public function getPassword(); /* @return string */ public function getDisplayName(); } Loading history...
107			}
108
109			return new $state($this);
110			}
111			}
112

railt / sdl

Push — master ( ecd78b...d05c81 )

Runtime::getState() A

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