Context::preferFrom() - Code Metrics - KSST/KF - Measure and Improve Code Quality continuously with Scrutinizer

Context::preferFrom() A
last analyzed 2017-04-11 14:32 UTC

↳ Parent: Context

Complexity

Conditions	3
Paths	3

Size

Total Lines	10
Code Lines	5

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
cc	3
eloc	5
c	0
b	0
f	0
nc	3
nop	1
dl	0
loc	10
rs	9.4285

<?php

/**
 * Koch Framework
 * Jens-André Koch © 2005 - onwards.
 *
 * This file is part of "Koch Framework".
 *
 * License: GNU/GPL v2 or any later version, see LICENSE file.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

namespace Koch\DI\Engine;

use Koch\DI\AbstractLifecycle;
use Koch\DI\Exception\CannotFindImplementation;
use Koch\DI\Lifecycle\Factory;
use Koch\DI\Lifecycle\Value;

class Context
{
    private $parent;
    /*private $repository;*/
    private $registry  = [];
    private $variables = [];
    private $contexts  = [];
    private $types     = [];
    private $wrappers  = [];

    public function __construct($parent)
    {
        $this->parent = $parent;
    }

    public function willUse($preference)
    {
        if ($preference instanceof AbstractLifecycle) {
            $lifecycle = $preference;
        } elseif (true === is_object($preference)) {
            $lifecycle = new Value($preference);
        } else {
            $lifecycle = new Factory($preference);
        }
        array_unshift($this->registry, $lifecycle);
    }

    /**
     * @param string $name
     */
    public function forVariable($name)
    {
        return $this->variables[$name] = new Variable($this);
    }

    /**
     * @param string $type
     */
    public function whenCreating($type)

    {
        if (false === isset($this->contexts[$type])) {
            $this->contexts[$type] = new self($this);
        }

        return $this->contexts[$type];
    }

    /**
     * @param string $type
     */
    public function forType($type)

    {
        if (false === isset($this->types[$type])) {
            $this->types[$type] = new Type();
        }

        return $this->types[$type];
    }

    public function wrapWith($type)
    {
        array_push($this->wrappers, $type);
    }

    public function create($type, $nesting = [])

    {
        $lifecycle = $this->pickFactory($type, $this->repository()->candidatesFor($type));
        $context   = $this->determineContext($lifecycle->class);
        $wrapper   = $context->hasWrapper($type, $nesting);

        if ($wrapper) {
            return $this->create($wrapper, $this->cons($wrapper, $nesting));
        }

        $instance = $lifecycle->instantiate(
            $context->createDependencies(
                $this->repository()->getConstructorParameters($lifecycle->class),
                $this->cons($lifecycle->class, $nesting)
            )
        );

        $this->invokeSetters($context, $nesting, $lifecycle->class, $instance);

        return $instance;
    }

    public function pickFactory($type, $candidates)

    {
        if (count($candidates) === 0) {
            throw new CannotFindImplementation($type);
        }

        $preference = $this->preferFrom($candidates);
        if ($preference) {
            return $preference;
        }

        if (count($candidates) === 1) {
            return new Factory($candidates[0]);
        }

        return $this->parent->pickFactory($type, $candidates);
    }

    public function hasWrapper($type, $already_applied)

    {
        $wrappers = $this->wrappersFor($type);
        foreach ($wrappers as $wrapper) {
            if (false === in_array($wrapper, $already_applied, true)) {

                return $wrapper;
            }
        }

        return false;
    }

    private function invokeSetters($context, $nesting, $class, $instance)
    {
        foreach ($context->settersFor($class) as $setter) {
            $context->invoke(
                $instance,
                $setter,
                $context->createDependencies(
                    $this->repository()->getParameters($class, $setter),
                    $this->cons($class, $nesting)
                )
            );
        }
    }

    private function settersFor($class)
    {
        $setters = isset($this->types[$class]) ? $this->types[$class]->setters : [];

        return array_values(array_keys(array_flip(array_merge($setters, $this->parent->settersFor($class)))));
    }

    public function wrappersFor($type)
    {
        return array_values(array_merge($this->wrappers, $this->parent->wrappersFor($type)));
    }

    public function createDependencies($parameters, $nesting)
    {
        $values = [];
        foreach ($parameters as $parameter) {
            try {
                $values[] = $this->instantiateParameter($parameter, $nesting);
            } catch (\Exception $e) {
                if ($parameter->isOptional()) {
                    break;
                }
                throw $e;
            }
        }

        return $values;
    }

    private function instantiateParameter($parameter, $nesting)

    {
        $hint = $parameter->getClass();
        if ($hint) {
            return $this->create($hint->getName(), $nesting);
        }

        if (true === isset($this->variables[$parameter->getName()])) {
            if ($this->variables[$parameter->getName()]->preference instanceof AbstractLifecycle) {
                return $this->variables[$parameter->getName()]->preference->instantiate([]);
            }

            if (false === is_string($this->variables[$parameter->getName()]->preference)) {
                return $this->variables[$parameter->getName()]->preference;
            }

            return $this->create($this->variables[$parameter->getName()]->preference, $nesting);
        }

        return $this->parent->instantiateParameter($parameter, $nesting);
    }

    private function determineContext($class)

    {
        foreach ($this->contexts as $type => $context) {
            if (true === $this->repository()->isSupertype($class, $type)) {
                return $context;
            }
        }

        return $this;
    }

    private function invoke($instance, $method, $arguments)
    {
        call_user_func_array([$instance, $method], $arguments);
    }

    private function preferFrom($candidates)

    {
        foreach ($this->registry as $preference) {
            if (true === $preference->isOneOf($candidates)) {
                return $preference;
            }
        }

        return false;
    }

    private function cons($head, $tail)
    {
        array_unshift($tail, $head);

        return $tail;
    }

    public function repository()

    {
        return $this->parent->repository();
    }
}


1			<?php
2
3			/**
4			* Koch Framework
5			* Jens-André Koch © 2005 - onwards.
6			*
7			* This file is part of "Koch Framework".
8			*
9			* License: GNU/GPL v2 or any later version, see LICENSE file.
10			*
11			* This program is free software; you can redistribute it and/or modify
12			* it under the terms of the GNU General Public License as published by
13			* the Free Software Foundation; either version 2 of the License, or
14			* (at your option) any later version.
15			*
16			* This program is distributed in the hope that it will be useful,
17			* but WITHOUT ANY WARRANTY; without even the implied warranty of
18			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19			* GNU General Public License for more details.
20			*
21			* You should have received a copy of the GNU General Public License
22			* along with this program. If not, see <http://www.gnu.org/licenses/>.
23			*/
24
25			namespace Koch\DI\Engine;
26
27			use Koch\DI\AbstractLifecycle;
28			use Koch\DI\Exception\CannotFindImplementation;
29			use Koch\DI\Lifecycle\Factory;
30			use Koch\DI\Lifecycle\Value;
31
32			class Context
33			{
34			private $parent;
35			/private $repository;/
36			private $registry = [];
37			private $variables = [];
38			private $contexts = [];
39			private $types = [];
40			private $wrappers = [];
41
42			public function __construct($parent)
43			{
44			$this->parent = $parent;
45			}
46
47			public function willUse($preference)
48			{
49			if ($preference instanceof AbstractLifecycle) {
50			$lifecycle = $preference;
51			} elseif (true === is_object($preference)) {
52			$lifecycle = new Value($preference);
53			} else {
54			$lifecycle = new Factory($preference);
55			}
56			array_unshift($this->registry, $lifecycle);
57			}
58
59			/**
60			* @param string $name
61			*/
62			public function forVariable($name)
63			{
64			return $this->variables[$name] = new Variable($this);
65			}
66
67			/**
68			* @param string $type
69			*/
70			public function whenCreating($type)
			0 ignored issues – show Documentation introduced 2015-12-23 17:35 UTC by Report Bug Copy Issue Report The return type could not be reliably inferred; please add a `@return` annotation. Our type inference engine in quite powerful, but sometimes the code does not provide enough clues to go by. In these cases we request you to add a `@return` annotation as described here. Loading history...
71			{
72			if (false === isset($this->contexts[$type])) {
73			$this->contexts[$type] = new self($this);
74			}
75
76			return $this->contexts[$type];
77			}
78
79			/**
80			* @param string $type
81			*/
82			public function forType($type)
			0 ignored issues – show Documentation introduced 2015-12-23 17:35 UTC by Report Bug Copy Issue Report The return type could not be reliably inferred; please add a `@return` annotation. Our type inference engine in quite powerful, but sometimes the code does not provide enough clues to go by. In these cases we request you to add a `@return` annotation as described here. Loading history...
83			{
84			if (false === isset($this->types[$type])) {
85			$this->types[$type] = new Type();
86			}
87
88			return $this->types[$type];
89			}
90
91			public function wrapWith($type)
92			{
93			array_push($this->wrappers, $type);
94			}
95
96			public function create($type, $nesting = [])
			0 ignored issues – show Documentation introduced 2015-12-23 17:35 UTC by Report Bug Copy Issue Report The return type could not be reliably inferred; please add a `@return` annotation. Our type inference engine in quite powerful, but sometimes the code does not provide enough clues to go by. In these cases we request you to add a `@return` annotation as described here. Loading history...
97			{
98			$lifecycle = $this->pickFactory($type, $this->repository()->candidatesFor($type));
99			$context = $this->determineContext($lifecycle->class);
100			$wrapper = $context->hasWrapper($type, $nesting);
101
102			if ($wrapper) {
103			return $this->create($wrapper, $this->cons($wrapper, $nesting));
104			}
105
106			$instance = $lifecycle->instantiate(
107			$context->createDependencies(
108			$this->repository()->getConstructorParameters($lifecycle->class),
109			$this->cons($lifecycle->class, $nesting)
110			)
111			);
112
113			$this->invokeSetters($context, $nesting, $lifecycle->class, $instance);
114
115			return $instance;
116			}
117
118			public function pickFactory($type, $candidates)
			0 ignored issues – show Documentation introduced 2015-12-23 17:35 UTC by Report Bug Copy Issue Report The return type could not be reliably inferred; please add a `@return` annotation. Our type inference engine in quite powerful, but sometimes the code does not provide enough clues to go by. In these cases we request you to add a `@return` annotation as described here. Loading history...
119			{
120			if (count($candidates) === 0) {
121			throw new CannotFindImplementation($type);
122			}
123
124			$preference = $this->preferFrom($candidates);
125			if ($preference) {
126			return $preference;
127			}
128
129			if (count($candidates) === 1) {
130			return new Factory($candidates[0]);
131			}
132
133			return $this->parent->pickFactory($type, $candidates);
134			}
135
136			public function hasWrapper($type, $already_applied)
			0 ignored issues – show Coding Style introduced 2015-12-23 17:35 UTC by Report Bug Copy Issue Report `$already_applied` does not seem to conform to the naming convention (`^[a-z][a-zA-Z0-9]*$`). This check examines a number of code elements and verifies that they conform to the given naming conventions. You can set conventions for local variables, abstract classes, utility classes, constant, properties, methods, parameters, interfaces, classes, exceptions and special methods. Loading history... Documentation introduced 2015-12-23 17:35 UTC by Report Bug Copy Issue Report The return type could not be reliably inferred; please add a `@return` annotation. Our type inference engine in quite powerful, but sometimes the code does not provide enough clues to go by. In these cases we request you to add a `@return` annotation as described here. Loading history...
137			{
138			$wrappers = $this->wrappersFor($type);
139			foreach ($wrappers as $wrapper) {
140			if (false === in_array($wrapper, $already_applied, true)) {
			0 ignored issues – show Coding Style introduced 2015-12-23 17:35 UTC by Report Bug Copy Issue Report `$already_applied` does not seem to conform to the naming convention (`^[a-z][a-zA-Z0-9]*$`). This check examines a number of code elements and verifies that they conform to the given naming conventions. You can set conventions for local variables, abstract classes, utility classes, constant, properties, methods, parameters, interfaces, classes, exceptions and special methods. Loading history...
141			return $wrapper;
142			}
143			}
144
145			return false;
146			}
147
148			private function invokeSetters($context, $nesting, $class, $instance)
149			{
150			foreach ($context->settersFor($class) as $setter) {
151			$context->invoke(
152			$instance,
153			$setter,
154			$context->createDependencies(
155			$this->repository()->getParameters($class, $setter),
156			$this->cons($class, $nesting)
157			)
158			);
159			}
160			}
161
162			private function settersFor($class)
163			{
164			$setters = isset($this->types[$class]) ? $this->types[$class]->setters : [];
165
166			return array_values(array_keys(array_flip(array_merge($setters, $this->parent->settersFor($class)))));
167			}
168
169			public function wrappersFor($type)
170			{
171			return array_values(array_merge($this->wrappers, $this->parent->wrappersFor($type)));
172			}
173
174			public function createDependencies($parameters, $nesting)
175			{
176			$values = [];
177			foreach ($parameters as $parameter) {
178			try {
179			$values[] = $this->instantiateParameter($parameter, $nesting);
180			} catch (\Exception $e) {
181			if ($parameter->isOptional()) {
182			break;
183			}
184			throw $e;
185			}
186			}
187
188			return $values;
189			}
190
191			private function instantiateParameter($parameter, $nesting)
			0 ignored issues – show Documentation introduced 2015-12-23 17:35 UTC by Report Bug Copy Issue Report The return type could not be reliably inferred; please add a `@return` annotation. Our type inference engine in quite powerful, but sometimes the code does not provide enough clues to go by. In these cases we request you to add a `@return` annotation as described here. Loading history...
192			{
193			$hint = $parameter->getClass();
194			if ($hint) {
195			return $this->create($hint->getName(), $nesting);
196			}
197
198			if (true === isset($this->variables[$parameter->getName()])) {
199			if ($this->variables[$parameter->getName()]->preference instanceof AbstractLifecycle) {
200			return $this->variables[$parameter->getName()]->preference->instantiate([]);
201			}
202
203			if (false === is_string($this->variables[$parameter->getName()]->preference)) {
204			return $this->variables[$parameter->getName()]->preference;
205			}
206
207			return $this->create($this->variables[$parameter->getName()]->preference, $nesting);
208			}
209
210			return $this->parent->instantiateParameter($parameter, $nesting);
211			}
212
213			private function determineContext($class)
			0 ignored issues – show Documentation introduced 2015-12-23 17:35 UTC by Report Bug Copy Issue Report The return type could not be reliably inferred; please add a `@return` annotation. Our type inference engine in quite powerful, but sometimes the code does not provide enough clues to go by. In these cases we request you to add a `@return` annotation as described here. Loading history...
214			{
215			foreach ($this->contexts as $type => $context) {
216			if (true === $this->repository()->isSupertype($class, $type)) {
217			return $context;
218			}
219			}
220
221			return $this;
222			}
223
224			private function invoke($instance, $method, $arguments)
225			{
226			call_user_func_array([$instance, $method], $arguments);
227			}
228
229			private function preferFrom($candidates)
			0 ignored issues – show Documentation introduced 2015-12-23 17:35 UTC by Report Bug Copy Issue Report The return type could not be reliably inferred; please add a `@return` annotation. Our type inference engine in quite powerful, but sometimes the code does not provide enough clues to go by. In these cases we request you to add a `@return` annotation as described here. Loading history...
230			{
231			foreach ($this->registry as $preference) {
232			if (true === $preference->isOneOf($candidates)) {
233			return $preference;
234			}
235			}
236
237			return false;
238			}
239
240			private function cons($head, $tail)
241			{
242			array_unshift($tail, $head);
243
244			return $tail;
245			}
246
247			public function repository()
			0 ignored issues – show Documentation introduced 2015-12-23 17:35 UTC by Report Bug Copy Issue Report The return type could not be reliably inferred; please add a `@return` annotation. Our type inference engine in quite powerful, but sometimes the code does not provide enough clues to go by. In these cases we request you to add a `@return` annotation as described here. Loading history...
248			{
249			return $this->parent->repository();
250			}
251			}
252

KSST / KF

Context::preferFrom() A last analyzed 2017-04-11 14:32 UTC

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Context::preferFrom() A
last analyzed 2017-04-11 14:32 UTC