Enum::detectConstants() - Code Metrics - Inspection of "added php-benchmark suite" - marc-mabe/php-enum - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — feature/bench ( 0b1202...ff0490 )

by Marc

created 2017-07-16 22:09 UTC

Enum::detectConstants() D

↳ Parent: Enum

Complexity

Conditions	10
Paths	5

Size

Total Lines	46
Code Lines	27

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	25
CRAP Score	10.7245

Importance

Changes

Metric	Value
dl	0
loc	46
ccs	25
cts	31
cp	0.8065
rs	4.983
c	0
b	0
f	0
cc	10
eloc	27
nc	5
nop	1
crap	10.7245

How to fix Complexity

<?php

namespace MabeEnum;

use ReflectionClass;
use InvalidArgumentException;
use LogicException;

/**
 * Class to implement enumerations for PHP 5 (without SplEnum)
 *
 * @link http://github.com/marc-mabe/php-enum for the canonical source repository
 * @copyright Copyright (c) 2015 Marc Bennewitz
 * @license http://github.com/marc-mabe/php-enum/blob/master/LICENSE.txt New BSD License
 */
abstract class Enum
{
    /**
     * The selected enumerator value
     *
     * @var null|bool|int|float|string
     */
    private $value;

    /**
     * The ordinal number of the enumerator
     *
     * @var null|int
     */
    private $ordinal;

    /**
     * An array of available constants by class
     *
     * @var array ["$class" => ["$name" => $value, ...], ...]
     */
    private static $constants = array();

    /**
     * Already instantiated enumerators
     *
     * @var array ["$class" => ["$name" => $instance, ...], ...]
     */
    private static $instances = array();

    /**
     * Constructor
     *
     * @param null|bool|int|float|string $value   The value of the enumerator
     * @param int|null                   $ordinal The ordinal number of the enumerator
     */
    final private function __construct($value, $ordinal = null)
    {
        $this->value   = $value;
        $this->ordinal = $ordinal;
    }

    /**
     * Get the name of the enumerator
     *
     * @return string
     * @see getName()
     */
    public function __toString()
    {
        return $this->getName();
    }

    /**
     * @throws LogicException Enums are not cloneable
     *                        because instances are implemented as singletons
     */
    final private function __clone()
    {
        throw new LogicException('Enums are not cloneable');
    }

    /**
     * @throws LogicException Enums are not serializable
     *                        because instances are implemented as singletons
     */
    final public function __sleep()
    {
        throw new LogicException('Enums are not serializable');
    }

    /**
     * @throws LogicException Enums are not serializable
     *                        because instances are implemented as singletons
     */
    final public function __wakeup()
    {
        throw new LogicException('Enums are not serializable');
    }

    /**
     * Get the value of the enumerator
     *
     * @return null|bool|int|float|string
     */
    final public function getValue()
    {
        return $this->value;
    }

    /**
     * Get the name of the enumerator
     *
     * @return string
     */
    final public function getName()
    {
        return array_search($this->value, self::detectConstants(static::class), true);
    }

    /**
     * Get the ordinal number of the enumerator
     *
     * @return int
     */
    final public function getOrdinal()
    {
        if ($this->ordinal !== null) {
            return $this->ordinal;
        }

        // detect ordinal
        $ordinal = 0;
        $value   = $this->value;
        foreach (self::detectConstants(static::class) as $constValue) {
            if ($value === $constValue) {
                break;
            }
            ++$ordinal;
        }

        $this->ordinal = $ordinal;
        return $ordinal;
    }

    /**
     * Compare this enumerator against another and check if it's the same.
     *
     * @param mixed $enumerator
     * @return bool
     */
    final public function is($enumerator)
    {
        return $this === $enumerator || $this->value === $enumerator

            // The following additional conditions are required only because of the issue of serializable singletons
            || ($enumerator instanceof static
                && get_class($enumerator) === static::class
                && $enumerator->value === $this->value
            );
    }

    /**
     * Get an enumerator instance of the given value or instance
     *
     * @param static|null|bool|int|float|string $value
     * @return static
     * @throws InvalidArgumentException On an unknwon or invalid value
     * @throws LogicException           On ambiguous constant values
     */
    final public static function get($value)
    {
        if ($value instanceof static && get_class($value) === static::class) {
            return $value;
        }

        return static::byValue($value);
    }

    /**
     * Get an enumerator instance by the given value
     *
     * @param mixed $value
     * @return static
     * @throws InvalidArgumentException On an unknwon or invalid value
     * @throws LogicException           On ambiguous constant values
     */
    final public static function byValue($value)
    {
        $class     = static::class;
        $constants = self::detectConstants($class);
        $name      = array_search($value, $constants, true);
        if ($name === false) {
            $message = is_scalar($value)
                ? 'Unknown value ' . var_export($value, true)
                : 'Invalid value of type ' . (is_object($value) ? get_class($value) : gettype($value));
            throw new InvalidArgumentException($message);
        }

        if (!isset(self::$instances[$class][$name])) {
            self::$instances[$class][$name] = new $class($constants[$name]);
        }

        return self::$instances[$class][$name];
    }

    /**
     * Get an enumerator instance by the given name
     *
     * @param string $name The name of the enumerator
     * @return static
     * @throws InvalidArgumentException On an invalid or unknown name
     * @throws LogicException           On ambiguous values
     */
    final public static function byName($name)
    {
        $name  = (string) $name;
        $class = static::class;
        if (isset(self::$instances[$class][$name])) {
            return self::$instances[$class][$name];
        }

        $const = $class . '::' . $name;
        if (!defined($const)) {
            throw new InvalidArgumentException($const . ' not defined');
        }

        return self::$instances[$class][$name] = new $class(constant($const));
    }

    /**
     * Get an enumeration instance by the given ordinal number
     *
     * @param int $ordinal The ordinal number or the enumerator
     * @return static
     * @throws InvalidArgumentException On an invalid ordinal number
     * @throws LogicException           On ambiguous values
     */
    final public static function byOrdinal($ordinal)
    {
        $ordinal   = (int) $ordinal;
        $class     = static::class;
        $constants = self::detectConstants($class);
        $item      = array_slice($constants, $ordinal, 1, true);
        if (empty($item)) {
            throw new InvalidArgumentException(sprintf(
                'Invalid ordinal number, must between 0 and %s',
                count($constants) - 1
            ));
        }

        $name = key($item);
        if (isset(self::$instances[$class][$name])) {
            return self::$instances[$class][$name];
        }

        return self::$instances[$class][$name] = new $class(current($item), $ordinal);
    }

    /**
     * Get a list of enumerator instances ordered by ordinal number
     *
     * @return static[]
     */
    final public static function getEnumerators()
    {
        return array_map([static::class, 'byName'], array_keys(self::detectConstants(static::class)));
    }

    /**
     * Get a list of enumerator values ordered by ordinal number
     *
     * @return mixed[]
     */
    final public static function getValues()
    {
        return array_values(self::detectConstants(static::class));
    }

    /**
     * Get a list of enumerator names ordered by ordinal number
     *
     * @return string[]
     */
    final public static function getNames()
    {
        return array_keys(self::detectConstants(static::class));
    }
    /*
     * Get a list of enumerator ordinal numbers
     *
     * @return int[]
     */
    final public static function getOrdinals()
    {
        $count = count(self::detectConstants(static::class));
        return $count === 0 ? array() : range(0, $count - 1);
    }

    /**
     * Get all available constants of the called class
     *
     * @return array
     * @throws LogicException On ambiguous constant values
     */
    final public static function getConstants()
    {
        return self::detectConstants(static::class);
    }

    /**
     * Is the given enumerator part of this enumeration
     * 
     * @param static|null|bool|int|float|string $value
     * @return bool
     */
    final public static function has($value)
    {
        if ($value instanceof static && get_class($value) === static::class) {
            return true;
        }

        $constants = self::detectConstants(static::class);
        return in_array($value, $constants, true);
    }

    /**
     * Detect all available constants by the given class
     *
     * @param string $class
     * @return array
     * @throws LogicException On ambiguous constant values
     */
    private static function detectConstants($class)
    {
        if (!isset(self::$constants[$class])) {
            $reflection = new ReflectionClass($class);
            $constants  = array();

            do {
                $scopeConstants = array();
                if (PHP_VERSION_ID >= 70100) {
                    // Since PHP-7.1 visibility modifiers are allowed for class constants
                    // for enumerations we are only interested in public once.
                    foreach ($reflection->getReflectionConstants() as $reflConstant) {
                        if ($reflConstant->isPublic()) {
                            $scopeConstants[ $reflConstant->getName() ] = $reflConstant->getValue();
                        }
                    }
                } else {
                    // In PHP < 7.1 all class constants were public by definition
                    $scopeConstants = $reflection->getConstants();
                }

                $constants = $scopeConstants + $constants;
            } while (($reflection = $reflection->getParentClass()) && $reflection->name !== __CLASS__);

            // Detect ambiguous values and report names
            $ambiguous = array();
            foreach ($constants as $value) {
                $names = array_keys($constants, $value, true);
                if (count($names) > 1) {
                    $ambiguous[var_export($value, true)] = $names;
                }
            }
            if (!empty($ambiguous)) {
                throw new LogicException(
                    'All possible values needs to be unique. The following are ambiguous: '
                    . implode(', ', array_map(function ($names) use ($constants) {
                        return implode('/', $names) . '=' . var_export($constants[$names[0]], true);
                    }, $ambiguous))
                );
            }

            self::$constants[$class] = $constants;
        }

        return self::$constants[$class];
    }

    /**
     * Get an enumerator instance by the given name.
     *
     * This will be called automatically on calling a method
     * with the same name of a defined enumerator.
     *
     * @param string $method The name of the enumeraotr (called as method)
     * @param array  $args   There should be no arguments
     * @return static
     * @throws InvalidArgumentException On an invalid or unknown name
     * @throws LogicException           On ambiguous constant values
     */
    final public static function __callStatic($method, array $args)
    {
        return self::byName($method);
    }
}


1			<?php
2
3			namespace MabeEnum;
4
5			use ReflectionClass;
6			use InvalidArgumentException;
7			use LogicException;
8
9			/**
10			* Class to implement enumerations for PHP 5 (without SplEnum)
11			*
12			* @link http://github.com/marc-mabe/php-enum for the canonical source repository
13			* @copyright Copyright (c) 2015 Marc Bennewitz
14			* @license http://github.com/marc-mabe/php-enum/blob/master/LICENSE.txt New BSD License
15			*/
16			abstract class Enum
17			{
18			/**
19			* The selected enumerator value
20			*
21			* @var null\|bool\|int\|float\|string
22			*/
23			private $value;
24
25			/**
26			* The ordinal number of the enumerator
27			*
28			* @var null\|int
29			*/
30			private $ordinal;
31
32			/**
33			* An array of available constants by class
34			*
35			* @var array ["$class" => ["$name" => $value, ...], ...]
36			*/
37			private static $constants = array();
38
39			/**
40			* Already instantiated enumerators
41			*
42			* @var array ["$class" => ["$name" => $instance, ...], ...]
43			*/
44			private static $instances = array();
45
46			/**
47			* Constructor
48			*
49			* @param null\|bool\|int\|float\|string $value The value of the enumerator
50			* @param int\|null $ordinal The ordinal number of the enumerator
51			*/
52	14		final private function __construct($value, $ordinal = null)
53			{
54	14		$this->value = $value;
55	14		$this->ordinal = $ordinal;
56	14		}
57
58			/**
59			* Get the name of the enumerator
60			*
61			* @return string
62			* @see getName()
63			*/
64	1		public function __toString()
65			{
66	1		return $this->getName();
67			}
68
69			/**
70			* @throws LogicException Enums are not cloneable
71			* because instances are implemented as singletons
72			*/
73	1		final private function __clone()
74			{
75	1		throw new LogicException('Enums are not cloneable');
76			}
77
78			/**
79			* @throws LogicException Enums are not serializable
80			* because instances are implemented as singletons
81			*/
82	1		final public function __sleep()
83			{
84	1		throw new LogicException('Enums are not serializable');
85			}
86
87			/**
88			* @throws LogicException Enums are not serializable
89			* because instances are implemented as singletons
90			*/
91	1		final public function __wakeup()
92			{
93	1		throw new LogicException('Enums are not serializable');
94			}
95
96			/**
97			* Get the value of the enumerator
98			*
99			* @return null\|bool\|int\|float\|string
100			*/
101	21		final public function getValue()
102			{
103	21		return $this->value;
104			}
105
106			/**
107			* Get the name of the enumerator
108			*
109			* @return string
110			*/
111	7		final public function getName()
112			{
113	7		return array_search($this->value, self::detectConstants(static::class), true);
114			}
115
116			/**
117			* Get the ordinal number of the enumerator
118			*
119			* @return int
120			*/
121	40		final public function getOrdinal()
122			{
123	40		if ($this->ordinal !== null) {
124	40		return $this->ordinal;
125			}
126
127			// detect ordinal
128	7		$ordinal = 0;
129	7		$value = $this->value;
130	7		foreach (self::detectConstants(static::class) as $constValue) {
131	7		if ($value === $constValue) {
132	7		break;
133			}
134	7		++$ordinal;
135	7		}
136
137	7		$this->ordinal = $ordinal;
138	7		return $ordinal;
139			}
140
141			/**
142			* Compare this enumerator against another and check if it's the same.
143			*
144			* @param mixed $enumerator
145			* @return bool
146			*/
147	2		final public function is($enumerator)
148			{
149	2		return $this === $enumerator \|\| $this->value === $enumerator
150
151			// The following additional conditions are required only because of the issue of serializable singletons
152	2		\|\| ($enumerator instanceof static
153	2		&& get_class($enumerator) === static::class
154	2		&& $enumerator->value === $this->value
155	2		);
156			}
157
158			/**
159			* Get an enumerator instance of the given value or instance
160			*
161			* @param static\|null\|bool\|int\|float\|string $value
162			* @return static
163			* @throws InvalidArgumentException On an unknwon or invalid value
164			* @throws LogicException On ambiguous constant values
165			*/
166	61		final public static function get($value)
167			{
168	61		if ($value instanceof static && get_class($value) === static::class) {
169	22		return $value;
170			}
171
172	46		return static::byValue($value);
173			}
174
175			/**
176			* Get an enumerator instance by the given value
177			*
178			* @param mixed $value
179			* @return static
180			* @throws InvalidArgumentException On an unknwon or invalid value
181			* @throws LogicException On ambiguous constant values
182			*/
183	46		final public static function byValue($value)
184			{
185	46		$class = static::class;
186	46		$constants = self::detectConstants($class);
187	44		$name = array_search($value, $constants, true);
188	44	View Code Duplication	if ($name === false) {
189	7		$message = is_scalar($value)
190	7		? 'Unknown value ' . var_export($value, true)
191	7		: 'Invalid value of type ' . (is_object($value) ? get_class($value) : gettype($value));
192	7		throw new InvalidArgumentException($message);
193			}
194
195	38		if (!isset(self::$instances[$class][$name])) {
196	7		self::$instances[$class][$name] = new $class($constants[$name]);
197	7		}
198
199	38		return self::$instances[$class][$name];
200			}
201
202			/**
203			* Get an enumerator instance by the given name
204			*
205			* @param string $name The name of the enumerator
206			* @return static
207			* @throws InvalidArgumentException On an invalid or unknown name
208			* @throws LogicException On ambiguous values
209			*/
210	32		final public static function byName($name)
211			{
212	32		$name = (string) $name;
213	32		$class = static::class;
214	32		if (isset(self::$instances[$class][$name])) {
215	27		return self::$instances[$class][$name];
216			}
217
218	6		$const = $class . '::' . $name;
219	6		if (!defined($const)) {
220	1		throw new InvalidArgumentException($const . ' not defined');
221			}
222
223	5		return self::$instances[$class][$name] = new $class(constant($const));
224			}
225
226			/**
227			* Get an enumeration instance by the given ordinal number
228			*
229			* @param int $ordinal The ordinal number or the enumerator
230			* @return static
231			* @throws InvalidArgumentException On an invalid ordinal number
232			* @throws LogicException On ambiguous values
233			*/
234	19		final public static function byOrdinal($ordinal)
235			{
236	19		$ordinal = (int) $ordinal;
237	19		$class = static::class;
238	19		$constants = self::detectConstants($class);
239	19		$item = array_slice($constants, $ordinal, 1, true);
240	19		if (empty($item)) {
241	1		throw new InvalidArgumentException(sprintf(
242	1		'Invalid ordinal number, must between 0 and %s',
243	1		count($constants) - 1
244	1		));
245			}
246
247	18		$name = key($item);
248	18		if (isset(self::$instances[$class][$name])) {
249	17		return self::$instances[$class][$name];
250			}
251
252	2		return self::$instances[$class][$name] = new $class(current($item), $ordinal);
253			}
254
255			/**
256			* Get a list of enumerator instances ordered by ordinal number
257			*
258			* @return static[]
259			*/
260	12		final public static function getEnumerators()
261			{
262	12		return array_map([static::class, 'byName'], array_keys(self::detectConstants(static::class)));
263			}
264
265			/**
266			* Get a list of enumerator values ordered by ordinal number
267			*
268			* @return mixed[]
269			*/
270	1		final public static function getValues()
271			{
272	1		return array_values(self::detectConstants(static::class));
273			}
274
275			/**
276			* Get a list of enumerator names ordered by ordinal number
277			*
278			* @return string[]
279			*/
280	1		final public static function getNames()
281			{
282	1		return array_keys(self::detectConstants(static::class));
283			}
284			/*
285			* Get a list of enumerator ordinal numbers
286			*
287			* @return int[]
288			*/
289	1		final public static function getOrdinals()
290			{
291	1		$count = count(self::detectConstants(static::class));
292	1		return $count === 0 ? array() : range(0, $count - 1);
293			}
294
295			/**
296			* Get all available constants of the called class
297			*
298			* @return array
299			* @throws LogicException On ambiguous constant values
300			*/
301	61		final public static function getConstants()
302			{
303	61		return self::detectConstants(static::class);
304			}
305
306			/**
307			* Is the given enumerator part of this enumeration
308			*
309			* @param static\|null\|bool\|int\|float\|string $value
310			* @return bool
311			*/
312	1		final public static function has($value)
313			{
314	1		if ($value instanceof static && get_class($value) === static::class) {
315	1		return true;
316			}
317
318	1		$constants = self::detectConstants(static::class);
319	1		return in_array($value, $constants, true);
320			}
321
322			/**
323			* Detect all available constants by the given class
324			*
325			* @param string $class
326			* @return array
327			* @throws LogicException On ambiguous constant values
328			*/
329	80		private static function detectConstants($class)
330			{
331	80		if (!isset(self::$constants[$class])) {
332	11		$reflection = new ReflectionClass($class);
333	11		$constants = array();
334
335			do {
336	11		$scopeConstants = array();
337	11		if (PHP_VERSION_ID >= 70100) {
338			// Since PHP-7.1 visibility modifiers are allowed for class constants
339			// for enumerations we are only interested in public once.
340			foreach ($reflection->getReflectionConstants() as $reflConstant) {
341			if ($reflConstant->isPublic()) {
342			$scopeConstants[ $reflConstant->getName() ] = $reflConstant->getValue();
343			}
344			}
345			} else {
346			// In PHP < 7.1 all class constants were public by definition
347	11		$scopeConstants = $reflection->getConstants();
348			}
349
350	11		$constants = $scopeConstants + $constants;
351	11		} while (($reflection = $reflection->getParentClass()) && $reflection->name !== __CLASS__);
352
353			// Detect ambiguous values and report names
354	11		$ambiguous = array();
355	11		foreach ($constants as $value) {
356	10		$names = array_keys($constants, $value, true);
357	10		if (count($names) > 1) {
358	2		$ambiguous[var_export($value, true)] = $names;
359	2		}
360	11		}
361	11		if (!empty($ambiguous)) {
362	2		throw new LogicException(
363			'All possible values needs to be unique. The following are ambiguous: '
364	2		. implode(', ', array_map(function ($names) use ($constants) {
365	2		return implode('/', $names) . '=' . var_export($constants[$names[0]], true);
366	2		}, $ambiguous))
367	2		);
368			}
369
370	9		self::$constants[$class] = $constants;
371	9		}
372
373	78		return self::$constants[$class];
374			}
375
376			/**
377			* Get an enumerator instance by the given name.
378			*
379			* This will be called automatically on calling a method
380			* with the same name of a defined enumerator.
381			*
382			* @param string $method The name of the enumeraotr (called as method)
383			* @param array $args There should be no arguments
384			* @return static
385			* @throws InvalidArgumentException On an invalid or unknown name
386			* @throws LogicException On ambiguous constant values
387			*/
388	18		final public static function __callStatic($method, array $args)
389			{
390	18		return self::byName($method);
391			}
392			}
393

marc-mabe / php-enum

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Enum::detectConstants() D

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