ReflectionParameter::isCallable() - Code Metrics - Inspection of "Clean some dead and unused code" - goaop/parser-reflection - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( eae51e...9e604e )

by Alexander

created 2016-12-27 08:09 UTC

ReflectionParameter::isCallable() 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\NullableType;
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->getType();
        $isOptional      = $this->isOptional();
        $hasDefaultValue = $this->isDefaultValueAvailable();
        $defaultValue    = '';
        if ($hasDefaultValue) {
            $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 ]',
            $this->parameterIndex,
            $isOptional ? '<optional>' : '<required>',
            $parameterType ? ReflectionType::convertToDisplayType($parameterType) . ' ' : '',
            $this->isVariadic() ? '...' : '',
            $this->isPassedByReference() ? '&' : '',
            $this->getName(),
            ($isOptional && $hasDefaultValue) ? (' = ' . $defaultValue) : ''
        );
    }

    /**
     * {@inheritDoc}
     */
    public function allowsNull()
    {
        // Enable 7.1 nullable types support
        if ($this->parameterNode->type instanceof NullableType) {
            return true;
        }

        $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) {
                $parameterTypeName = $parameterType->toString();

                if ('self' === $parameterTypeName) {
                    return $this->getDeclaringClass();
                }

                if ('parent' === $parameterTypeName) {
                    return $this->getDeclaringClass()->getParentClass();
                }

                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;
        $parameterType = $this->parameterNode->type;
        if ($parameterType instanceof NullableType) {
            $parameterType = $parameterType->type;
        }

        $allowsNull = $this->allowsNull();
        if (is_object($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 $this->isVariadic() || ($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\NullableType;
17		use PhpParser\Node\Param;
18		use ReflectionParameter as BaseReflectionParameter;
19
20		/**
21		* AST-based reflection for method/function parameter
22		*/
23		class ReflectionParameter extends BaseReflectionParameter
24		{
25		use InternalPropertiesEmulationTrait;
26
27		/**
28		* Reflection function or method
29		*
30		* @var \ReflectionFunctionAbstract
31		*/
32		private $declaringFunction;
33
34		/**
35		* Stores the default value for node (if present)
36		*
37		* @var mixed
38		*/
39		private $defaultValue = null;
40
41		/**
42		* Whether or not default value is constant
43		*
44		* @var bool
45		*/
46		private $isDefaultValueConstant = false;
47
48		/**
49		* Name of the constant of default value
50		*
51		* @var string
52		*/
53		private $defaultValueConstantName;
54
55		/**
56		* Index of parameter in the list
57		*
58		* @var int
59		*/
60		private $parameterIndex = 0;
61
62		/**
63		* Concrete parameter node
64		*
65		* @var Param
66		*/
67		private $parameterNode;
68
69		/**
70		* Initializes a reflection for the property
71		*
72		* @param string\|array $unusedFunctionName Name of the function/method
73		* @param string $parameterName Name of the parameter to reflect
74		* @param Param $parameterNode Parameter definition node
75		* @param int $parameterIndex Index of parameter
76		* @param \ReflectionFunctionAbstract $declaringFunction
77		*/
78	31	public function __construct(
79		$unusedFunctionName,
80		$parameterName,
81		Param $parameterNode = null,
82		$parameterIndex = 0,
83		\ReflectionFunctionAbstract $declaringFunction = null
84		) {
85		// Let's unset original read-only property to have a control over it via __get
86	31	unset($this->name);
87
88	31	$this->parameterNode = $parameterNode;
89	31	$this->parameterIndex = $parameterIndex;
90	31	$this->declaringFunction = $declaringFunction;
91
92	31	if ($this->isDefaultValueAvailable()) {
93	19	if ($declaringFunction instanceof \ReflectionMethod) {
94	9	$context = $declaringFunction->getDeclaringClass();
95		} else {
96	10	$context = $declaringFunction;
97		};
98
99	19	$expressionSolver = new NodeExpressionResolver($context);
100	19	$expressionSolver->process($this->parameterNode->default);
101	19	$this->defaultValue = $expressionSolver->getValue();
102	19	$this->isDefaultValueConstant = $expressionSolver->isConstant();
103	19	$this->defaultValueConstantName = $expressionSolver->getConstantName();
104		}
105	31	}
106
107		/**
108		* Emulating original behaviour of reflection
109		*/
110	1	public function ___debugInfo()
111		{
112		return array(
113	1	'name' => $this->parameterNode->name,
114		);
115		}
116
117		/**
118		* Returns string representation of this parameter.
119		*
120		* @return string
121		*/
122	20	public function __toString()
123		{
124	20	$parameterType = $this->getType();
125	20	$isOptional = $this->isOptional();
126	20	$hasDefaultValue = $this->isDefaultValueAvailable();
127	20	$defaultValue = '';
128	20	if ($hasDefaultValue) {
129	9	$defaultValue = $this->getDefaultValue();
130	9	if (is_string($defaultValue) && strlen($defaultValue) > 15) {
131	4	$defaultValue = substr($defaultValue, 0, 15) . '...';
132		}
133		/* @see https://3v4l.org/DJOEb for behaviour changes */
134	9	if (is_double($defaultValue) && fmod($defaultValue, 1.0) === 0.0) {
135	3	$defaultValue = (int) $defaultValue;
136		}
137
138	9	$defaultValue = str_replace('\\\\', '\\', var_export($defaultValue, true));
139		}
140
141	20	return sprintf(
142	20	'Parameter #%d [ %s %s%s%s$%s%s ]',
143	20	$this->parameterIndex,
144	20	$isOptional ? '<optional>' : '<required>',
145	20	$parameterType ? ReflectionType::convertToDisplayType($parameterType) . ' ' : '',
146	20	$this->isVariadic() ? '...' : '',
147	20	$this->isPassedByReference() ? '&' : '',
148	20	$this->getName(),
149	20	($isOptional && $hasDefaultValue) ? (' = ' . $defaultValue) : ''
150		);
151		}
152
153		/**
154		* {@inheritDoc}
155		*/
156	21	public function allowsNull()
157		{
158		// Enable 7.1 nullable types support
159	21	if ($this->parameterNode->type instanceof NullableType) {
160	6	return true;
161		}
162
163	15	$hasDefaultNull = $this->isDefaultValueAvailable() && $this->getDefaultValue() === null;
164	15	if ($hasDefaultNull) {
165	3	return true;
166		}
167
168	14	return !isset($this->parameterNode->type);
169		}
170
171		/**
172		* {@inheritDoc}
173		*/
174	3	public function canBePassedByValue()
175		{
176	3	return !$this->isPassedByReference();
177		}
178
179		/**
180		* @inheritDoc
181		*/
182	2	public function getClass()
183		{
184	2	$parameterType = $this->parameterNode->type;
185	2	if ($parameterType instanceof Name) {
186	2	if (!$parameterType instanceof Name\FullyQualified) {
187	1	$parameterTypeName = $parameterType->toString();
188
189	1	if ('self' === $parameterTypeName) {
190	1	return $this->getDeclaringClass();
191		}
192
193	1	if ('parent' === $parameterTypeName) {
194	1	return $this->getDeclaringClass()->getParentClass();
195		}
196
197		throw new ReflectionException("Can not resolve a class name for parameter");
198		}
199	1	$className = $parameterType->toString();
200	1	$classOrInterfaceExists = class_exists($className, false) \|\| interface_exists($className, false);
201
202	1	return $classOrInterfaceExists ? new \ReflectionClass($className) : new ReflectionClass($className);
203		}
204
205	1	return null;
206		}
207
208		/**
209		* {@inheritDoc}
210		*/
211	3	public function getDeclaringClass()
212		{
213	3	if ($this->declaringFunction instanceof \ReflectionMethod) {
214	2	return $this->declaringFunction->getDeclaringClass();
215		};
216
217	1	return null;
218		}
219
220		/**
221		* {@inheritDoc}
222		*/
223	14	public function getDeclaringFunction()
224		{
225	14	return $this->declaringFunction;
226		}
227
228		/**
229		* {@inheritDoc}
230		*/
231	12	public function getDefaultValue()
232		{
233	12	if (!$this->isDefaultValueAvailable()) {
234	1	throw new ReflectionException('Internal error: Failed to retrieve the default value');
235		}
236
237	11	return $this->defaultValue;
238		}
239
240		/**
241		* {@inheritDoc}
242		*/
243	6	public function getDefaultValueConstantName()
244		{
245	6	if (!$this->isDefaultValueAvailable()) {
246	1	throw new ReflectionException('Internal error: Failed to retrieve the default value');
247		}
248
249	5	return $this->defaultValueConstantName;
250		}
251
252		/**
253		* @inheritDoc
254		*/
255	21	public function getName()
256		{
257	21	return $this->parameterNode->name;
258		}
259
260		/**
261		* {@inheritDoc}
262		*/
263	3	public function getPosition()
264		{
265	3	return $this->parameterIndex;
266		}
267
268		/**
269		* @inheritDoc
270		*/
271	21	public function getType()
272		{
273	21	$isBuiltin = false;
274	21	$parameterType = $this->parameterNode->type;
275	21	if ($parameterType instanceof NullableType) {
276	6	$parameterType = $parameterType->type;
277		}
278
279	21	$allowsNull = $this->allowsNull();
280	21	if (is_object($parameterType)) {
281	3	$parameterType = $parameterType->toString();
282	21	} elseif (is_string($parameterType)) {
283	17	$isBuiltin = true;
284		} else {
285	6	return null;
286		}
287
288	17	return new ReflectionType($parameterType, $allowsNull, $isBuiltin);
289		}
290
291		/**
292		* @inheritDoc
293		*/
294	4	public function hasType()
295		{
296	4	$hasType = isset($this->parameterNode->type);
297
298	4	return $hasType;
299		}
300
301		/**
302		* @inheritDoc
303		*/
304	3	public function isArray()
305		{
306	3	return 'array' === $this->parameterNode->type;
307		}
308
309		/**
310		* @inheritDoc
311		*/
312	3	public function isCallable()
313		{
314	3	return 'callable' === $this->parameterNode->type;
315		}
316
317		/**
318		* @inheritDoc
319		*/
320	45	public function isDefaultValueAvailable()
321		{
322	45	return isset($this->parameterNode->default);
323		}
324
325		/**
326		* {@inheritDoc}
327		*/
328	5	public function isDefaultValueConstant()
329		{
330	5	return $this->isDefaultValueConstant;
331		}
332
333		/**
334		* {@inheritDoc}
335		*/
336	36	public function isOptional()
337		{
338	36	return $this->isVariadic() \|\| ($this->isDefaultValueAvailable() && $this->haveSiblingsDefalutValues());
339		}
340
341		/**
342		* @inheritDoc
343		*/
344	20	public function isPassedByReference()
345		{
346	20	return (bool) $this->parameterNode->byRef;
347		}
348
349		/**
350		* @inheritDoc
351		*/
352	52	public function isVariadic()
353		{
354	52	return (bool) $this->parameterNode->variadic;
355		}
356
357		/**
358		* Returns if all following parameters have a default value definition.
359		*
360		* @return bool
361		* @throws ReflectionException If could not fetch declaring function reflection
362		*/
363	14	protected function haveSiblingsDefalutValues()
364		{
365	14	$function = $this->getDeclaringFunction();
366	14	if (null === $function) {
367		throw new ReflectionException('Could not get the declaring function reflection.');
368		}
369
370		/** @var \ReflectionParameter[] $remainingParameters */
371	14	$remainingParameters = array_slice($function->getParameters(), $this->parameterIndex + 1);
372	14	foreach ($remainingParameters as $reflectionParameter) {
373	14	if (!$reflectionParameter->isDefaultValueAvailable()) {
374	14	return false;
375		}
376		}
377
378	13	return true;
379		}
380		}
381

goaop / parser-reflection

Push — master ( eae51e...9e604e )

ReflectionParameter::isCallable() A

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