FactoryTrait::getObjectByClass() - Code Metrics - Inspection of "updated README" - phossa2/di - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( 98ccbf...73e071 )

by Hong

created 2016-07-13 09:11 UTC

FactoryTrait::getObjectByClass() B

↳ Parent: FactoryTrait

Complexity

Conditions	3
Paths	4

Size

Total Lines	24
Code Lines	11

Duplication

Lines	0
Ratio	0 %

Importance

Changes	4
Bugs	0	Features	1

Metric	Value
c	4
b	0
f	1
dl	0
loc	24
rs	8.9713
cc	3
eloc	11
nc	4
nop	1

<?php
/**
 * Phossa Project
 *
 * PHP version 5.4
 *
 * @category  Library
 * @package   Phossa2\Di
 * @copyright Copyright (c) 2016 phossa.com
 * @license   http://mit-license.org/ MIT License
 * @link      http://www.phossa.com/
 */
/*# declare(strict_types=1); */

namespace Phossa2\Di\Traits;

use Phossa2\Di\Container;
use Phossa2\Di\Exception\LogicException;
use Phossa2\Di\Resolver\ObjectResolver;
use Phossa2\Di\Message\Message;

/**
 * FactoryTrait
 *
 * Create service instance here
 *
 * @package Phossa2\Di
 * @author  Hong Zhang <[email protected]>
 * @version 2.0.0
 * @since   2.0.0 added
 */
trait FactoryTrait
{
    /**
     * @var    Container
     * @access protected
     */
    protected $master;

    /**
     * Get service definition (and fix it)
     *
     * @param  string $rawId
     * @param  array $args
     * @return array
     * @access protected
     */
    protected function getDefinition(
        /*# string */ $rawId,
        array $args
    )/*# : array */ {
        // get the definition
        $def = $this->master->getResolver()->getService($rawId);

        // fix class
        if (!is_array($def) || !isset($def['class'])) {
            $def = ['class' => $def];
        }

        // add resolved arguments
        if (!empty($args)) {
            $this->master->resolve($args);
            $def['args'] = $args;
        }

        return (array) $def;
    }

    /**
     * Instantiate service object from classname
     *
     * @param  string $class
     * @param  array $args
     * @return object
     * @throws LogicException if something goes wrong
     * @access protected
     */
    protected function constructObject(/*# string */ $class, array $args)
    {
        $reflector = new \ReflectionClass($class);
        $constructor = $reflector->getConstructor();

        // not constructor defined
        if (is_null($constructor)) {
            $obj = $reflector->newInstanceWithoutConstructor();

        // normal class with constructor
        } else {
            $args = $this->matchArguments(
                $constructor->getParameters(),
                $args
            );
            $obj = $reflector->newInstanceArgs($args);
        }

        return $obj;
    }

    /**
     * Match provided arguments with a method/function's reflection parameters
     *
     * @param  \ReflectionParameter[] $reflectionParameters
     * @param  array $providedArguments
     * @return array the resolved arguments
     * @throws LogicException
     * @access protected
     */
    protected function matchArguments(
        array $reflectionParameters,
        array $providedArguments
    )/*# : array */ {
        // result
        $resolvedArguments = [];
        foreach ($reflectionParameters as $i => $param) {
            $class = $param->getClass();

            if ($this->isTypeMatched($class, $providedArguments)) {
                $resolvedArguments[$i] = array_shift($providedArguments);

            } elseif ($this->isRequiredClass($param, $providedArguments)) {
                $resolvedArguments[$i] = $this->getObjectByClass($class->getName());
            }
        }
        return array_merge($resolvedArguments, $providedArguments);
    }

    /**
     * Try best to guess parameter and argument are the same type
     *
     * @param  null|\ReflectionClass $class
     * @param  array $arguments
     * @return bool
     * @access protected
     */
    protected function isTypeMatched($class, array $arguments)/*# : bool */
    {
        if (empty($arguments)) {
            return false;
        } elseif (null !== $class) {
            return is_a($arguments[0], $class->getName());
        } else {
            return true;
        }
    }

    /**
     * Is $param required and is a class/interface
     *
     * @param  \ReflectionParameter $param
     * @param  array $arguments
     * @return bool
     * @throws LogicException if mismatched arguments
     * @access protected
     */
    protected function isRequiredClass(
        \ReflectionParameter $param,
        array $arguments
    )/*# : bool */ {
        $optional = $param->isOptional();
        if ($param->getClass()) {
            return !$optional || !empty($arguments);
        } else {
            return false;
        }
    }

    /**
     * Get an object base on provided classname or interface name
     *
     * @param  string $classname class or interface name
     * @return object
     * @throws \Exception if something goes wrong
     * @access protected
     */
    protected function getObjectByClass(/*# string */ $classname)
    {
        $mapped = $classname;

        // resolve mapping
        if ($this->master->getResolver()->hasMapping($classname)) {
            $mapped = $this->master->getResolver()->getMapping($classname);
        }

        // get object by mapping or classname
        $obj = $this->getObjectByType($mapped, $classname);

        // found
        if (is_a($obj, $classname, false)) {
            return $obj;

        // failure
        } else {
            throw new LogicException(
                Message::get(Message::DI_CLASS_UNKNOWN, $classname),
                Message::DI_CLASS_UNKNOWN
            );
        }
    }

    /**
     * Get callable parameters
     *
     * @param  callable $callable
     * @return \ReflectionParameter[]
     * @throws LogicException if something goes wrong
     * @access protected
     */
    protected function getCallableParameters(callable $callable)/*# : array */
    {
        // array type
        if (is_array($callable)) {
            $reflector = new \ReflectionClass($callable[0]);
            $method = $reflector->getMethod($callable[1]);

        // object with __invoke() defined
        } elseif ($this->isInvocable($callable)) {
            $reflector = new \ReflectionClass($callable);
            $method = $reflector->getMethod('__invoke');

        // simple function
        } else {
            $method = new \ReflectionFunction($callable);
        }

        return $method->getParameters();
    }

    /**
     * Is $var a non-closure object with '__invoke()' defined ?
     *
     * @param  mixed $var
     * @return bool
     * @access protected
     */
    protected function isInvocable($var)/*# : bool */
    {
        return is_object($var) &&
            !$var instanceof \Closure &&
            method_exists($var, '__invoke');
    }

    /**
     * Get object by different mapped
     *
     * @param  mixed $mapped
     * @param  string $classname
     * @return object
     * @access protected
     */
    protected function getObjectByType($mapped, /*# string */ $classname)
    {
        // matched object
        if (is_a($mapped, $classname, false)) {
            return $mapped;
        }

        // callable
        if (is_callable($mapped)) {
            $mapped = call_user_func($mapped);

        }

        // string
        if (is_string($mapped)) {
            $serviceId = ObjectResolver::getServiceId($mapped);
            $mapped = $this->master->getResolver()->get($serviceId);

        }

        return $mapped;
    }

    /**
     * Merge different sections of a node
     *
     * convert
     *   `['section1' => [[1], [2]], 'section2' => [[3], [4]]]`
     *
     * to
     *   `[[1], [2], [3], [4]]`
     *
     * @param  array $nodeData
     * @return array
     * @access protected
     */
    protected function mergeMethods(array $nodeData)/*# : array */
    {
        // no merge
        if (empty($nodeData) || isset($nodeData[0])) {
            return $nodeData;
        }

        // in sections
        $result = [];
        foreach ($nodeData as $data) {
            $result = array_merge($result, $data);
        }
        return $result;
    }
}


1			<?php
2			/**
3			* Phossa Project
4			*
5			* PHP version 5.4
6			*
7			* @category Library
8			* @package Phossa2\Di
9			* @copyright Copyright (c) 2016 phossa.com
10			* @license http://mit-license.org/ MIT License
11			* @link http://www.phossa.com/
12			*/
13			/# declare(strict_types=1); /
14
15			namespace Phossa2\Di\Traits;
16
17			use Phossa2\Di\Container;
18			use Phossa2\Di\Exception\LogicException;
19			use Phossa2\Di\Resolver\ObjectResolver;
20			use Phossa2\Di\Message\Message;
21
22			/**
23			* FactoryTrait
24			*
25			* Create service instance here
26			*
27			* @package Phossa2\Di
28			* @author Hong Zhang <[email protected]>
29			* @version 2.0.0
30			* @since 2.0.0 added
31			*/
32			trait FactoryTrait
33			{
34			/**
35			* @var Container
36			* @access protected
37			*/
38			protected $master;
39
40			/**
41			* Get service definition (and fix it)
42			*
43			* @param string $rawId
44			* @param array $args
45			* @return array
46			* @access protected
47			*/
48			protected function getDefinition(
49			/# string / $rawId,
50			array $args
51			)/# : array / {
52			// get the definition
53			$def = $this->master->getResolver()->getService($rawId);
54
55			// fix class
56			if (!is_array($def) \|\| !isset($def['class'])) {
57			$def = ['class' => $def];
58			}
59
60			// add resolved arguments
61			if (!empty($args)) {
62			$this->master->resolve($args);
63			$def['args'] = $args;
64			}
65
66			return (array) $def;
67			}
68
69			/**
70			* Instantiate service object from classname
71			*
72			* @param string $class
73			* @param array $args
74			* @return object
75			* @throws LogicException if something goes wrong
76			* @access protected
77			*/
78			protected function constructObject(/# string / $class, array $args)
79			{
80			$reflector = new \ReflectionClass($class);
81			$constructor = $reflector->getConstructor();
82
83			// not constructor defined
84			if (is_null($constructor)) {
85			$obj = $reflector->newInstanceWithoutConstructor();
86
87			// normal class with constructor
88			} else {
89			$args = $this->matchArguments(
90			$constructor->getParameters(),
91			$args
92			);
93			$obj = $reflector->newInstanceArgs($args);
94			}
95
96			return $obj;
97			}
98
99			/**
100			* Match provided arguments with a method/function's reflection parameters
101			*
102			* @param \ReflectionParameter[] $reflectionParameters
103			* @param array $providedArguments
104			* @return array the resolved arguments
105			* @throws LogicException
106			* @access protected
107			*/
108			protected function matchArguments(
109			array $reflectionParameters,
110			array $providedArguments
111			)/# : array / {
112			// result
113			$resolvedArguments = [];
114			foreach ($reflectionParameters as $i => $param) {
115			$class = $param->getClass();
116
117			if ($this->isTypeMatched($class, $providedArguments)) {
118			$resolvedArguments[$i] = array_shift($providedArguments);
119
120			} elseif ($this->isRequiredClass($param, $providedArguments)) {
121			$resolvedArguments[$i] = $this->getObjectByClass($class->getName());
122			}
123			}
124			return array_merge($resolvedArguments, $providedArguments);
125			}
126
127			/**
128			* Try best to guess parameter and argument are the same type
129			*
130			* @param null\|\ReflectionClass $class
131			* @param array $arguments
132			* @return bool
133			* @access protected
134			*/
135			protected function isTypeMatched($class, array $arguments)/# : bool /
136			{
137			if (empty($arguments)) {
138			return false;
139			} elseif (null !== $class) {
140			return is_a($arguments[0], $class->getName());
141			} else {
142			return true;
143			}
144			}
145
146			/**
147			* Is $param required and is a class/interface
148			*
149			* @param \ReflectionParameter $param
150			* @param array $arguments
151			* @return bool
152			* @throws LogicException if mismatched arguments
153			* @access protected
154			*/
155			protected function isRequiredClass(
156			\ReflectionParameter $param,
157			array $arguments
158			)/# : bool / {
159			$optional = $param->isOptional();
160			if ($param->getClass()) {
161			return !$optional \|\| !empty($arguments);
162			} else {
163			return false;
164			}
165			}
166
167			/**
168			* Get an object base on provided classname or interface name
169			*
170			* @param string $classname class or interface name
171			* @return object
172			* @throws \Exception if something goes wrong
173			* @access protected
174			*/
175			protected function getObjectByClass(/# string / $classname)
176			{
177			$mapped = $classname;
178
179			// resolve mapping
180			if ($this->master->getResolver()->hasMapping($classname)) {
181			$mapped = $this->master->getResolver()->getMapping($classname);
182			}
183
184			// get object by mapping or classname
185			$obj = $this->getObjectByType($mapped, $classname);
186
187			// found
188			if (is_a($obj, $classname, false)) {
189			return $obj;
190
191			// failure
192			} else {
193			throw new LogicException(
194			Message::get(Message::DI_CLASS_UNKNOWN, $classname),
195			Message::DI_CLASS_UNKNOWN
196			);
197			}
198			}
199
200			/**
201			* Get callable parameters
202			*
203			* @param callable $callable
204			* @return \ReflectionParameter[]
205			* @throws LogicException if something goes wrong
206			* @access protected
207			*/
208			protected function getCallableParameters(callable $callable)/# : array /
209			{
210			// array type
211			if (is_array($callable)) {
212			$reflector = new \ReflectionClass($callable[0]);
213			$method = $reflector->getMethod($callable[1]);
214
215			// object with __invoke() defined
216			} elseif ($this->isInvocable($callable)) {
217			$reflector = new \ReflectionClass($callable);
218			$method = $reflector->getMethod('__invoke');
219
220			// simple function
221			} else {
222			$method = new \ReflectionFunction($callable);
223			}
224
225			return $method->getParameters();
226			}
227
228			/**
229			* Is $var a non-closure object with '__invoke()' defined ?
230			*
231			* @param mixed $var
232			* @return bool
233			* @access protected
234			*/
235			protected function isInvocable($var)/# : bool /
236			{
237			return is_object($var) &&
238			!$var instanceof \Closure &&
239			method_exists($var, '__invoke');
240			}
241
242			/**
243			* Get object by different mapped
244			*
245			* @param mixed $mapped
246			* @param string $classname
247			* @return object
248			* @access protected
249			*/
250			protected function getObjectByType($mapped, /# string / $classname)
251			{
252			// matched object
253			if (is_a($mapped, $classname, false)) {
254			return $mapped;
255			}
256
257			// callable
258			if (is_callable($mapped)) {
259			$mapped = call_user_func($mapped);
			1 ignored issue – show Coding Style introduced 2016-07-13 09:14 UTC by Report Bug Copy Issue Report Consider using a different name than the parameter `$mapped`. This often makes code more readable. Loading history...
260			}
261
262			// string
263			if (is_string($mapped)) {
264			$serviceId = ObjectResolver::getServiceId($mapped);
265			$mapped = $this->master->getResolver()->get($serviceId);
			1 ignored issue – show Coding Style introduced 2016-07-13 09:14 UTC by Report Bug Copy Issue Report Consider using a different name than the parameter `$mapped`. This often makes code more readable. Loading history...
266			}
267
268			return $mapped;
269			}
270
271			/**
272			* Merge different sections of a node
273			*
274			* convert
275			* `['section1' => [[1], [2]], 'section2' => [[3], [4]]]`
276			*
277			* to
278			* `[[1], [2], [3], [4]]`
279			*
280			* @param array $nodeData
281			* @return array
282			* @access protected
283			*/
284			protected function mergeMethods(array $nodeData)/# : array /
285			{
286			// no merge
287			if (empty($nodeData) \|\| isset($nodeData[0])) {
288			return $nodeData;
289			}
290
291			// in sections
292			$result = [];
293			foreach ($nodeData as $data) {
294			$result = array_merge($result, $data);
295			}
296			return $result;
297			}
298			}
299

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FactoryTrait::getObjectByClass() B

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