ReflectionParameter::isDefaultValueConstant() - Code Metrics - Inspection of "Allow using internal interfaces (e.g. "Traversable..." - goaop/parser-reflection - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#21)

by Alexander

created 2016-06-13 12:43 UTC

ReflectionParameter::isDefaultValueConstant() A

↳ Parent: ReflectionParameter

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

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

<?php
/**
 * Parser Reflection API
 *
 * @copyright Copyright 2015, Lisachenko Alexander <[email protected]>
 *
 * This source file is subject to the license that is bundled
 * with this source code in the file LICENSE.
 */

namespace Go\ParserReflection;

use Go\ParserReflection\Traits\InternalPropertiesEmulationTrait;
use Go\ParserReflection\ValueResolver\NodeExpressionResolver;
use PhpParser\Node\Name;
use PhpParser\Node\Param;
use ReflectionParameter as BaseReflectionParameter;

/**
 * AST-based reflection for method/function parameter
 */
class ReflectionParameter extends BaseReflectionParameter
{
    use InternalPropertiesEmulationTrait;

    /**
     * Reflection function or method
     *
     * @var \ReflectionFunctionAbstract
     */
    private $declaringFunction;

    /**
     * Stores the default value for node (if present)
     *
     * @var mixed
     */
    private $defaultValue = null;

    /**
     * Whether or not default value is constant
     *
     * @var bool
     */
    private $isDefaultValueConstant = false;

    /**
     * Name of the constant of default value
     *
     * @var string
     */
    private $defaultValueConstantName;

    /**
     * Index of parameter in the list
     *
     * @var int
     */
    private $parameterIndex = 0;

    /**
     * Concrete parameter node
     *
     * @var Param
     */
    private $parameterNode;

    /**
     * Initializes a reflection for the property
     *
     * @param string|array $unusedFunctionName Name of the function/method
     * @param string $parameterName Name of the parameter to reflect
     * @param Param $parameterNode Parameter definition node
     * @param int $parameterIndex Index of parameter
     * @param \ReflectionFunctionAbstract $declaringFunction
     */
    public function __construct(
        $unusedFunctionName,
        $parameterName,
        Param $parameterNode = null,
        $parameterIndex = 0,
        \ReflectionFunctionAbstract $declaringFunction = null
    ) {
        // Let's unset original read-only property to have a control over it via __get
        unset($this->name);

        $this->parameterNode     = $parameterNode;
        $this->parameterIndex    = $parameterIndex;
        $this->declaringFunction = $declaringFunction;

        if ($this->isDefaultValueAvailable()) {
            if ($declaringFunction instanceof \ReflectionMethod) {
                $context = $declaringFunction->getDeclaringClass();
            } else {
                $context = $declaringFunction;
            };

            $expressionSolver = new NodeExpressionResolver($context);
            $expressionSolver->process($this->parameterNode->default);
            $this->defaultValue             = $expressionSolver->getValue();
            $this->isDefaultValueConstant   = $expressionSolver->isConstant();
            $this->defaultValueConstantName = $expressionSolver->getConstantName();
        }
    }

    /**
     * Emulating original behaviour of reflection
     */
    public function ___debugInfo()
    {
        return array(
            'name' => $this->parameterNode->name,
        );
    }

    /**
     * Returns string representation of this parameter.
     *
     * @return string
     */
    public function __toString()
    {
        $parameterType = $this->parameterNode->type;
        if (is_object($parameterType)) {
            $parameterType = $parameterType->toString();
        }
        $isNullableParam = !empty($parameterType) && $this->allowsNull();
        $isOptional      = $this->isOptional();
        $defaultValue    = '';
        if ($isOptional) {
            $defaultValue = $this->getDefaultValue();
            if (is_string($defaultValue) && strlen($defaultValue) > 15) {
                $defaultValue = substr($defaultValue, 0, 15) . '...';
            }
            /* @see https://3v4l.org/DJOEb for behaviour changes */
            if (is_double($defaultValue) && fmod($defaultValue, 1.0) === 0.0) {
                $defaultValue = (int) $defaultValue;
            }
            $defaultValue = str_replace('\\\\', '\\', var_export($defaultValue, true));
        }

        return sprintf(
            'Parameter #%d [ %s %s%s%s%s$%s%s ]',
            $this->parameterIndex,
            ($this->isVariadic() || $isOptional) ? '<optional>' : '<required>',
            $parameterType ? ltrim($parameterType, '\\') . ' ' : '',
            $isNullableParam ? 'or NULL ' : '',
            $this->isVariadic() ? '...' : '',
            $this->isPassedByReference() ? '&' : '',
            $this->getName(),
            $isOptional ? (' = ' . $defaultValue) : ''
        );
    }

    /**
     * {@inheritDoc}
     */
    public function allowsNull()
    {
        $hasDefaultNull = $this->isDefaultValueAvailable() && $this->getDefaultValue() === null;
        if ($hasDefaultNull) {
            return true;
        }

        return !isset($this->parameterNode->type);
    }

    /**
     * {@inheritDoc}
     */
    public function canBePassedByValue()
    {
        return !$this->isPassedByReference();
    }

    /**
     * @inheritDoc
     */
    public function getClass()
    {
        $parameterType = $this->parameterNode->type;
        if ($parameterType instanceof Name) {
            if (!$parameterType instanceof Name\FullyQualified) {
                throw new ReflectionException("Can not resolve a class name for parameter");
            }
            $className   = $parameterType->toString();
            $classOrInterfaceExists = class_exists($className, false) || interface_exists($className, false);

            return $classOrInterfaceExists ? new \ReflectionClass($className) : new ReflectionClass($className);
        }

        return null;
    }

    /**
     * {@inheritDoc}
     */
    public function getDeclaringClass()
    {
        if ($this->declaringFunction instanceof \ReflectionMethod) {
            return $this->declaringFunction->getDeclaringClass();
        };

        return null;
    }

    /**
     * {@inheritDoc}
     */
    public function getDeclaringFunction()
    {
        return $this->declaringFunction;
    }

    /**
     * {@inheritDoc}
     */
    public function getDefaultValue()
    {
        if (!$this->isDefaultValueAvailable()) {
            throw new ReflectionException('Internal error: Failed to retrieve the default value');
        }

        return $this->defaultValue;
    }

    /**
     * {@inheritDoc}
     */
    public function getDefaultValueConstantName()
    {
        if (!$this->isDefaultValueAvailable()) {
            throw new ReflectionException('Internal error: Failed to retrieve the default value');
        }

        return $this->defaultValueConstantName;
    }

    /**
     * @inheritDoc
     */
    public function getName()
    {
        return $this->parameterNode->name;
    }

    /**
     * {@inheritDoc}
     */
    public function getPosition()
    {
        return $this->parameterIndex;
    }

    /**
     * @inheritDoc
     */
    public function getType()
    {
        $isBuiltin     = false;
        $allowsNull    = $this->allowsNull();
        $parameterType = $this->parameterNode->type;
        if (is_object($parameterType)) {
            $parameterType = $parameterType->toString();
        } elseif (is_string($parameterType)) {
            $isBuiltin = true;
        } else {
            return null;
        }

        return new ReflectionType($parameterType, $allowsNull, $isBuiltin);
    }

    /**
     * @inheritDoc
     */
    public function hasType()
    {
        $hasType = isset($this->parameterNode->type);

        return $hasType;
    }

    /**
     * @inheritDoc
     */
    public function isArray()
    {
        return 'array' === $this->parameterNode->type;
    }

    /**
     * @inheritDoc
     */
    public function isCallable()
    {
        return 'callable' === $this->parameterNode->type;
    }

    /**
     * @inheritDoc
     */
    public function isDefaultValueAvailable()
    {
        return isset($this->parameterNode->default);
    }

    /**
     * {@inheritDoc}
     */
    public function isDefaultValueConstant()
    {
        return $this->isDefaultValueConstant;
    }

    /**
     * {@inheritDoc}
     */
    public function isOptional()
    {
        return $this->isDefaultValueAvailable() && $this->haveSiblingsDefalutValues();
    }

    /**
     * @inheritDoc
     */
    public function isPassedByReference()
    {
        return (bool) $this->parameterNode->byRef;
    }

    /**
     * @inheritDoc
     */
    public function isVariadic()
    {
        return (bool) $this->parameterNode->variadic;
    }

    /**
     * Returns if all following parameters have a default value definition.
     *
     * @return bool
     * @throws ReflectionException If could not fetch declaring function reflection
     */
    protected function haveSiblingsDefalutValues()
    {
        $function = $this->getDeclaringFunction();
        if (null === $function) {
            throw new ReflectionException('Could not get the declaring function reflection.');
        }

        /** @var \ReflectionParameter[] $remainingParameters */
        $remainingParameters = array_slice($function->getParameters(), $this->parameterIndex + 1);
        foreach ($remainingParameters as $reflectionParameter) {
            if (!$reflectionParameter->isDefaultValueAvailable()) {
                return false;
            }
        }

        return true;
    }
}


1		<?php
2		/**
3		* Parser Reflection API
4		*
5		* @copyright Copyright 2015, Lisachenko Alexander <[email protected]>
6		*
7		* This source file is subject to the license that is bundled
8		* with this source code in the file LICENSE.
9		*/
10
11		namespace Go\ParserReflection;
12
13		use Go\ParserReflection\Traits\InternalPropertiesEmulationTrait;
14		use Go\ParserReflection\ValueResolver\NodeExpressionResolver;
15		use PhpParser\Node\Name;
16		use PhpParser\Node\Param;
17		use ReflectionParameter as BaseReflectionParameter;
18
19		/**
20		* AST-based reflection for method/function parameter
21		*/
22		class ReflectionParameter extends BaseReflectionParameter
23		{
24		use InternalPropertiesEmulationTrait;
25
26		/**
27		* Reflection function or method
28		*
29		* @var \ReflectionFunctionAbstract
30		*/
31		private $declaringFunction;
32
33		/**
34		* Stores the default value for node (if present)
35		*
36		* @var mixed
37		*/
38		private $defaultValue = null;
39
40		/**
41		* Whether or not default value is constant
42		*
43		* @var bool
44		*/
45		private $isDefaultValueConstant = false;
46
47		/**
48		* Name of the constant of default value
49		*
50		* @var string
51		*/
52		private $defaultValueConstantName;
53
54		/**
55		* Index of parameter in the list
56		*
57		* @var int
58		*/
59		private $parameterIndex = 0;
60
61		/**
62		* Concrete parameter node
63		*
64		* @var Param
65		*/
66		private $parameterNode;
67
68		/**
69		* Initializes a reflection for the property
70		*
71		* @param string\|array $unusedFunctionName Name of the function/method
72		* @param string $parameterName Name of the parameter to reflect
73		* @param Param $parameterNode Parameter definition node
74		* @param int $parameterIndex Index of parameter
75		* @param \ReflectionFunctionAbstract $declaringFunction
76		*/
77	10	public function __construct(
78		$unusedFunctionName,
79		$parameterName,
80		Param $parameterNode = null,
81		$parameterIndex = 0,
82		\ReflectionFunctionAbstract $declaringFunction = null
83		) {
84		// Let's unset original read-only property to have a control over it via __get
85	10	unset($this->name);
86
87	10	$this->parameterNode = $parameterNode;
88	10	$this->parameterIndex = $parameterIndex;
89	10	$this->declaringFunction = $declaringFunction;
90
91	10	if ($this->isDefaultValueAvailable()) {
92	10	if ($declaringFunction instanceof \ReflectionMethod) {
93	2	$context = $declaringFunction->getDeclaringClass();
94		} else {
95	8	$context = $declaringFunction;
96		};
97
98	10	$expressionSolver = new NodeExpressionResolver($context);
99	10	$expressionSolver->process($this->parameterNode->default);
100	10	$this->defaultValue = $expressionSolver->getValue();
101	10	$this->isDefaultValueConstant = $expressionSolver->isConstant();
102	10	$this->defaultValueConstantName = $expressionSolver->getConstantName();
103		}
104	10	}
105
106		/**
107		* Emulating original behaviour of reflection
108		*/
109	1	public function ___debugInfo()
110		{
111		return array(
112	1	'name' => $this->parameterNode->name,
113		);
114		}
115
116		/**
117		* Returns string representation of this parameter.
118		*
119		* @return string
120		*/
121	3	public function __toString()
122		{
123	3	$parameterType = $this->parameterNode->type;
124	3	if (is_object($parameterType)) {
125	1	$parameterType = $parameterType->toString();
126		}
127	3	$isNullableParam = !empty($parameterType) && $this->allowsNull();
128	3	$isOptional = $this->isOptional();
129	3	$defaultValue = '';
130	3	if ($isOptional) {
131	2	$defaultValue = $this->getDefaultValue();
132	2	if (is_string($defaultValue) && strlen($defaultValue) > 15) {
133		$defaultValue = substr($defaultValue, 0, 15) . '...';
134		}
135		/* @see https://3v4l.org/DJOEb for behaviour changes */
136	2	if (is_double($defaultValue) && fmod($defaultValue, 1.0) === 0.0) {
137	2	$defaultValue = (int) $defaultValue;
138		}
139	2	$defaultValue = str_replace('\\\\', '\\', var_export($defaultValue, true));
140		}
141
142	3	return sprintf(
143	3	'Parameter #%d [ %s %s%s%s%s$%s%s ]',
144	3	$this->parameterIndex,
145	3	($this->isVariadic() \|\| $isOptional) ? '<optional>' : '<required>',
146	3	$parameterType ? ltrim($parameterType, '\\') . ' ' : '',
147	3	$isNullableParam ? 'or NULL ' : '',
148	3	$this->isVariadic() ? '...' : '',
149	3	$this->isPassedByReference() ? '&' : '',
150	3	$this->getName(),
151	3	$isOptional ? (' = ' . $defaultValue) : ''
152		);
153		}
154
155		/**
156		* {@inheritDoc}
157		*/
158	2	public function allowsNull()
159		{
160	2	$hasDefaultNull = $this->isDefaultValueAvailable() && $this->getDefaultValue() === null;
161	2	if ($hasDefaultNull) {
162	2	return true;
163		}
164
165	2	return !isset($this->parameterNode->type);
166		}
167
168		/**
169		* {@inheritDoc}
170		*/
171	1	public function canBePassedByValue()
172		{
173	1	return !$this->isPassedByReference();
174		}
175
176		/**
177		* @inheritDoc
178		*/
179	1	public function getClass()
180		{
181	1	$parameterType = $this->parameterNode->type;
182	1	if ($parameterType instanceof Name) {
183	1	if (!$parameterType instanceof Name\FullyQualified) {
184		throw new ReflectionException("Can not resolve a class name for parameter");
185		}
186	1	$className = $parameterType->toString();
187	1	$classOrInterfaceExists = class_exists($className, false) \|\| interface_exists($className, false);
188
189	1	return $classOrInterfaceExists ? new \ReflectionClass($className) : new ReflectionClass($className);
190		}
191
192	1	return null;
193		}
194
195		/**
196		* {@inheritDoc}
197		*/
198	2	public function getDeclaringClass()
199		{
200	2	if ($this->declaringFunction instanceof \ReflectionMethod) {
201	1	return $this->declaringFunction->getDeclaringClass();
202		};
203
204	1	return null;
205		}
206
207		/**
208		* {@inheritDoc}
209		*/
210	3	public function getDeclaringFunction()
211		{
212	3	return $this->declaringFunction;
213		}
214
215		/**
216		* {@inheritDoc}
217		*/
218	5	public function getDefaultValue()
219		{
220	5	if (!$this->isDefaultValueAvailable()) {
221	1	throw new ReflectionException('Internal error: Failed to retrieve the default value');
222		}
223
224	4	return $this->defaultValue;
225		}
226
227		/**
228		* {@inheritDoc}
229		*/
230	2	public function getDefaultValueConstantName()
231		{
232	2	if (!$this->isDefaultValueAvailable()) {
233	1	throw new ReflectionException('Internal error: Failed to retrieve the default value');
234		}
235
236	1	return $this->defaultValueConstantName;
237		}
238
239		/**
240		* @inheritDoc
241		*/
242	4	public function getName()
243		{
244	4	return $this->parameterNode->name;
245		}
246
247		/**
248		* {@inheritDoc}
249		*/
250	1	public function getPosition()
251		{
252	1	return $this->parameterIndex;
253		}
254
255		/**
256		* @inheritDoc
257		*/
258	1	public function getType()
259		{
260	1	$isBuiltin = false;
261	1	$allowsNull = $this->allowsNull();
262	1	$parameterType = $this->parameterNode->type;
263	1	if (is_object($parameterType)) {
264	1	$parameterType = $parameterType->toString();
265	1	} elseif (is_string($parameterType)) {
266	1	$isBuiltin = true;
267		} else {
268	1	return null;
269		}
270
271	1	return new ReflectionType($parameterType, $allowsNull, $isBuiltin);
272		}
273
274		/**
275		* @inheritDoc
276		*/
277	2	public function hasType()
278		{
279	2	$hasType = isset($this->parameterNode->type);
280
281	2	return $hasType;
282		}
283
284		/**
285		* @inheritDoc
286		*/
287	1	public function isArray()
288		{
289	1	return 'array' === $this->parameterNode->type;
290		}
291
292		/**
293		* @inheritDoc
294		*/
295	1	public function isCallable()
296		{
297	1	return 'callable' === $this->parameterNode->type;
298		}
299
300		/**
301		* @inheritDoc
302		*/
303	10	public function isDefaultValueAvailable()
304		{
305	10	return isset($this->parameterNode->default);
306		}
307
308		/**
309		* {@inheritDoc}
310		*/
311	1	public function isDefaultValueConstant()
312		{
313	1	return $this->isDefaultValueConstant;
314		}
315
316		/**
317		* {@inheritDoc}
318		*/
319	3	public function isOptional()
320		{
321	3	return $this->isDefaultValueAvailable() && $this->haveSiblingsDefalutValues();
322		}
323
324		/**
325		* @inheritDoc
326		*/
327	3	public function isPassedByReference()
328		{
329	3	return (bool) $this->parameterNode->byRef;
330		}
331
332		/**
333		* @inheritDoc
334		*/
335	3	public function isVariadic()
336		{
337	3	return (bool) $this->parameterNode->variadic;
338		}
339
340		/**
341		* Returns if all following parameters have a default value definition.
342		*
343		* @return bool
344		* @throws ReflectionException If could not fetch declaring function reflection
345		*/
346	3	protected function haveSiblingsDefalutValues()
347		{
348	3	$function = $this->getDeclaringFunction();
349	3	if (null === $function) {
350		throw new ReflectionException('Could not get the declaring function reflection.');
351		}
352
353		/** @var \ReflectionParameter[] $remainingParameters */
354	3	$remainingParameters = array_slice($function->getParameters(), $this->parameterIndex + 1);
355	3	foreach ($remainingParameters as $reflectionParameter) {
356	3	if (!$reflectionParameter->isDefaultValueAvailable()) {
357	3	return false;
358		}
359		}
360
361	2	return true;
362		}
363		}
364

goaop / parser-reflection

Pull Request — master (#21)

ReflectionParameter::isDefaultValueConstant() A

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