vanilla /
garden-container
Complex classes like Container often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes. You can also have a look at the cohesion graph to spot any un-connected, or weakly-connected components.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
While breaking up the class, it is a good idea to analyze how other classes use Container, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 15 | class Container implements ContainerInterface { |
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| 16 | private $currentRule; |
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| 17 | private $currentRuleName; |
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| 18 | private $instances; |
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| 19 | private $rules; |
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| 20 | private $factories; |
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| 21 | |||
| 22 | /** |
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| 23 | * Construct a new instance of the {@link Container} class. |
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| 24 | */ |
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| 25 | 88 | public function __construct() { |
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| 32 | |||
| 33 | /** |
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| 34 | * Deep clone rules. |
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| 35 | */ |
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| 36 | 1 | public function __clone() { |
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| 40 | |||
| 41 | /** |
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| 42 | * Clear all instances |
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| 43 | * |
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| 44 | */ |
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| 45 | 1 | public function clearInstances() { |
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| 46 | 1 | $this->instances = []; |
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| 47 | 1 | } |
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| 48 | |||
| 49 | /** |
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| 50 | * Deep clone an array. |
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| 51 | * |
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| 52 | * @param array $array The array to clone. |
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| 53 | * @return array Returns the cloned array. |
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| 54 | * @see http://stackoverflow.com/a/17729234 |
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| 55 | */ |
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| 56 | 1 | private function arrayClone(array $array) { |
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| 57 | return array_map(function ($element) { |
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| 58 | 1 | return ((is_array($element)) |
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| 59 | 1 | ? $this->arrayClone($element) |
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| 60 | 1 | : ((is_object($element)) |
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| 61 | ? clone $element |
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| 62 | 1 | : $element |
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| 63 | ) |
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| 64 | ); |
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| 65 | 1 | }, $array); |
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| 66 | } |
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| 67 | |||
| 68 | /** |
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| 69 | * Normalize a container entry ID. |
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| 70 | * |
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| 71 | * @param string $id The ID to normalize. |
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| 72 | * @return string Returns a normalized ID as a string. |
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| 73 | */ |
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| 74 | 89 | private function normalizeID($id) { |
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| 77 | |||
| 78 | /** |
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| 79 | * Set the current rule to the default rule. |
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| 80 | * |
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| 81 | * @return $this |
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| 82 | */ |
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| 83 | 1 | public function defaultRule() { |
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| 86 | |||
| 87 | /** |
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| 88 | * Set the current rule. |
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| 89 | * |
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| 90 | * @param string $id The ID of the rule. |
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| 91 | * @return $this |
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| 92 | */ |
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| 93 | 88 | public function rule($id) { |
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| 94 | 88 | $id = $this->normalizeID($id); |
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| 95 | |||
| 96 | 88 | if (!isset($this->rules[$id])) { |
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| 97 | 43 | $this->rules[$id] = []; |
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| 98 | } |
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| 99 | 88 | $this->currentRuleName = $id; |
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| 100 | 88 | $this->currentRule = &$this->rules[$id]; |
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| 101 | |||
| 102 | 88 | return $this; |
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| 103 | } |
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| 104 | |||
| 105 | /** |
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| 106 | * Get the class name of the current rule. |
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| 107 | * |
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| 108 | * @return string Returns a class name. |
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| 109 | */ |
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| 110 | 2 | public function getClass() { |
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| 113 | |||
| 114 | /** |
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| 115 | * Set the name of the class for the current rule. |
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| 116 | * |
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| 117 | * @param string $className A valid class name. |
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| 118 | * @return $this |
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| 119 | */ |
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| 120 | 8 | public function setClass($className) { |
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| 124 | |||
| 125 | /** |
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| 126 | * Get the rule that the current rule references. |
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| 127 | * |
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| 128 | * @return string Returns a reference name or an empty string if there is no reference. |
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| 129 | */ |
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| 130 | 3 | public function getAliasOf() { |
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| 133 | |||
| 134 | /** |
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| 135 | * Set the rule that the current rule is an alias of. |
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| 136 | * |
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| 137 | * @param string $alias The name of an entry in the container to point to. |
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| 138 | * @return $this |
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| 139 | */ |
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| 140 | 4 | public function setAliasOf($alias) { |
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| 141 | 4 | $alias = $this->normalizeID($alias); |
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| 142 | |||
| 143 | 4 | if ($alias === $this->currentRuleName) { |
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| 144 | 1 | trigger_error("You cannot set alias '$alias' to itself.", E_USER_NOTICE); |
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| 145 | } else { |
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| 146 | 3 | $this->currentRule['aliasOf'] = $alias; |
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| 147 | } |
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| 148 | 4 | return $this; |
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| 149 | } |
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| 150 | |||
| 151 | /** |
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| 152 | * Add an alias of the current rule. |
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| 153 | * |
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| 154 | * Setting an alias to the current rule means that getting an item with the alias' name will be like getting the item |
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| 155 | * with the current rule. If the current rule is shared then the same shared instance will be returned. You can add |
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| 156 | * multiple aliases by passing additional arguments to this method. |
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| 157 | * |
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| 158 | * If {@link Container::addAlias()} is called with an alias that is the same as the current rule then an **E_USER_NOTICE** |
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| 159 | * level error is raised and the alias is not added. |
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| 160 | * |
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| 161 | * @param string ...$alias The alias to set. |
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| 162 | * @return $this |
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| 163 | * @since 1.4 Added the ability to pass multiple aliases. |
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| 164 | */ |
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| 165 | 8 | public function addAlias(...$alias) { |
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| 166 | 8 | foreach ($alias as $name) { |
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| 167 | 8 | $name = $this->normalizeID($name); |
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| 168 | |||
| 169 | 8 | if ($name === $this->currentRuleName) { |
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| 170 | 1 | trigger_error("Tried to set alias '$name' to self.", E_USER_NOTICE); |
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| 171 | } else { |
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| 172 | 8 | $this->rules[$name]['aliasOf'] = $this->currentRuleName; |
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| 173 | } |
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| 174 | } |
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| 175 | 8 | return $this; |
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| 176 | } |
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| 177 | |||
| 178 | /** |
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| 179 | * Remove an alias of the current rule. |
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| 180 | * |
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| 181 | * If {@link Container::removeAlias()} is called with an alias that references a different rule then an **E_USER_NOTICE** |
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| 182 | * level error is raised, but the alias is still removed. |
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| 183 | * |
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| 184 | * @param string $alias The alias to remove. |
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| 185 | * @return $this |
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| 186 | */ |
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| 187 | 2 | public function removeAlias($alias) { |
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| 188 | 2 | $alias = $this->normalizeID($alias); |
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| 189 | |||
| 190 | 2 | if (!empty($this->rules[$alias]['aliasOf']) && $this->rules[$alias]['aliasOf'] !== $this->currentRuleName) { |
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| 191 | 1 | trigger_error("Alias '$alias' does not point to the current rule.", E_USER_NOTICE); |
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| 192 | } |
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| 193 | |||
| 194 | 2 | unset($this->rules[$alias]['aliasOf']); |
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| 195 | 2 | return $this; |
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| 196 | } |
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| 197 | |||
| 198 | /** |
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| 199 | * Get all of the aliases of the current rule. |
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| 200 | * |
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| 201 | * This method is intended to aid in debugging and should not be used in production as it walks the entire rule array. |
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| 202 | * |
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| 203 | * @return array Returns an array of strings representing aliases. |
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| 204 | */ |
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| 205 | 6 | public function getAliases() { |
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| 206 | 6 | $result = []; |
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| 207 | |||
| 208 | 6 | foreach ($this->rules as $name => $rule) { |
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| 209 | 6 | if (!empty($rule['aliasOf']) && $rule['aliasOf'] === $this->currentRuleName) { |
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| 210 | 6 | $result[] = $name; |
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| 211 | } |
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| 212 | } |
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| 213 | |||
| 214 | 6 | return $result; |
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| 215 | } |
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| 216 | |||
| 217 | /** |
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| 218 | * Get the factory callback for the current rule. |
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| 219 | * |
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| 220 | * @return callable|null Returns the rule's factory or **null** if it has none. |
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| 221 | */ |
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| 222 | 2 | public function getFactory() { |
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| 225 | |||
| 226 | /** |
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| 227 | * Set the factory that will be used to create the instance for the current rule. |
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| 228 | * |
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| 229 | * @param callable $factory This callback will be called to create the instance for the rule. |
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| 230 | * @return $this |
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| 231 | */ |
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| 232 | 10 | public function setFactory(callable $factory) { |
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| 236 | |||
| 237 | /** |
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| 238 | * Whether or not the current rule is shared. |
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| 239 | * |
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| 240 | * @return bool Returns **true** if the rule is shared or **false** otherwise. |
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| 241 | */ |
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| 242 | 2 | public function isShared() { |
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| 245 | |||
| 246 | /** |
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| 247 | * Set whether or not the current rule is shared. |
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| 248 | * |
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| 249 | * @param bool $shared Whether or not the current rule is shared. |
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| 250 | * @return $this |
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| 251 | */ |
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| 252 | 38 | public function setShared($shared) { |
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| 256 | |||
| 257 | /** |
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| 258 | * Whether or not the current rule will inherit to subclasses. |
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| 259 | * |
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| 260 | * @return bool Returns **true** if the current rule inherits or **false** otherwise. |
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| 261 | */ |
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| 262 | 2 | public function getInherit() { |
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| 265 | |||
| 266 | /** |
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| 267 | * Set whether or not the current rule extends to subclasses. |
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| 268 | * |
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| 269 | * @param bool $inherit Pass **true** to have subclasses inherit this rule or **false** otherwise. |
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| 270 | * @return $this |
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| 271 | */ |
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| 272 | 3 | public function setInherit($inherit) { |
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| 276 | |||
| 277 | /** |
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| 278 | * Get the constructor arguments for the current rule. |
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| 279 | * |
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| 280 | * @return array Returns the constructor arguments for the current rule. |
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| 281 | */ |
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| 282 | 2 | public function getConstructorArgs() { |
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| 285 | |||
| 286 | /** |
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| 287 | * Set the constructor arguments for the current rule. |
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| 288 | * |
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| 289 | * @param array $args An array of constructor arguments. |
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| 290 | * @return $this |
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| 291 | */ |
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| 292 | 25 | public function setConstructorArgs(array $args) { |
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| 296 | |||
| 297 | /** |
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| 298 | * Set a specific shared instance into the container. |
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| 299 | * |
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| 300 | * When you set an instance into the container then it will always be returned by subsequent retrievals, even if a |
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| 301 | * rule is configured that says that instances should not be shared. |
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| 302 | * |
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| 303 | * @param string $name The name of the container entry. |
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| 304 | * @param mixed $instance This instance. |
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| 305 | * @return $this |
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| 306 | */ |
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| 307 | 9 | public function setInstance($name, $instance) { |
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| 311 | |||
| 312 | /** |
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| 313 | * Add a method call to a rule. |
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| 314 | * |
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| 315 | * @param string $method The name of the method to call. |
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| 316 | * @param array $args The arguments to pass to the method. |
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| 317 | * @return $this |
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| 318 | */ |
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| 319 | 8 | public function addCall($method, array $args = []) { |
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| 324 | |||
| 325 | /** |
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| 326 | * Finds an entry of the container by its identifier and returns it. |
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| 327 | * |
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| 328 | * @param string $id Identifier of the entry to look for. |
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| 329 | * @param array $args Additional arguments to pass to the constructor. |
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| 330 | * |
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| 331 | * @throws NotFoundException No entry was found for this identifier. |
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| 332 | * @throws ContainerException Error while retrieving the entry. |
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| 333 | * |
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| 334 | * @return mixed Entry. |
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| 335 | */ |
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| 336 | 69 | public function getArgs($id, array $args = []) { |
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| 358 | |||
| 359 | /** |
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| 360 | * Make a rule based on an ID. |
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| 361 | * |
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| 362 | * @param string $nid A normalized ID. |
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| 363 | * @return array Returns an array representing a rule. |
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| 364 | */ |
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| 365 | 65 | private function makeRule($nid) { |
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| 366 | 65 | $rule = isset($this->rules[$nid]) ? $this->rules[$nid] : []; |
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| 367 | |||
| 368 | 65 | if (class_exists($nid)) { |
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| 369 | 57 | for ($class = get_parent_class($nid); !empty($class); $class = get_parent_class($class)) { |
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| 370 | // Don't add the rule if it doesn't say to inherit. |
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| 371 | 6 | if (!isset($this->rules[$class]) || (isset($this->rules[$class]['inherit']) && !$this->rules[$class]['inherit'])) { |
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| 372 | 4 | break; |
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| 373 | } |
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| 374 | 2 | $rule += $this->rules[$class]; |
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| 375 | } |
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| 376 | |||
| 377 | // Add the default rule. |
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| 378 | 57 | if (!empty($this->rules['*']['inherit'])) { |
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| 379 | 57 | $rule += $this->rules['*']; |
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| 380 | } |
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| 381 | |||
| 382 | // Add interface calls to the rule. |
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| 383 | 57 | $interfaces = class_implements($nid); |
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| 384 | 57 | foreach ($interfaces as $interface) { |
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| 385 | 40 | if (isset($this->rules[$interface])) { |
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| 386 | 10 | $interfaceRule = $this->rules[$interface]; |
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| 387 | |||
| 388 | 10 | if (isset($interfaceRule['inherit']) && $interfaceRule['inherit'] === false) { |
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| 389 | 1 | continue; |
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| 390 | } |
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| 391 | |||
| 392 | 9 | if (!isset($rule['shared']) && isset($interfaceRule['shared'])) { |
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| 393 | 3 | $rule['shared'] = $interfaceRule['shared']; |
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| 394 | } |
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| 395 | |||
| 396 | 9 | if (!isset($rule['constructorArgs']) && isset($interfaceRule['constructorArgs'])) { |
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| 397 | 3 | $rule['constructorArgs'] = $interfaceRule['constructorArgs']; |
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| 398 | } |
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| 399 | |||
| 400 | 9 | if (!empty($interfaceRule['calls'])) { |
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| 401 | 2 | $rule['calls'] = array_merge( |
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| 402 | 2 | isset($rule['calls']) ? $rule['calls'] : [], |
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| 403 | 57 | $interfaceRule['calls'] |
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| 404 | ); |
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| 405 | } |
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| 406 | } |
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| 407 | } |
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| 408 | 12 | } elseif (!empty($this->rules['*']['inherit'])) { |
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| 409 | // Add the default rule. |
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| 410 | 12 | $rule += $this->rules['*']; |
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| 411 | } |
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| 412 | |||
| 413 | 65 | return $rule; |
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| 414 | } |
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| 415 | |||
| 416 | /** |
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| 417 | * Make a function that creates objects from a rule. |
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| 418 | * |
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| 419 | * @param string $nid The normalized ID of the container item. |
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| 420 | * @param array $rule The resolved rule for the ID. |
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| 421 | * @return \Closure Returns a function that when called will create a new instance of the class. |
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| 422 | * @throws NotFoundException No entry was found for this identifier. |
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| 423 | */ |
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| 424 | 43 | private function makeFactory($nid, array $rule) { |
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| 425 | 43 | $className = empty($rule['class']) ? $nid : $rule['class']; |
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| 426 | |||
| 427 | 43 | if (!empty($rule['factory'])) { |
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| 428 | // The instance is created with a user-supplied factory function. |
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| 429 | 6 | $callback = $rule['factory']; |
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| 430 | 6 | $function = $this->reflectCallback($callback); |
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| 431 | |||
| 432 | 6 | if ($function->getNumberOfParameters() > 0) { |
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| 433 | 3 | $callbackArgs = $this->makeDefaultArgs($function, (array)$rule['constructorArgs'], $rule); |
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| 434 | $factory = function ($args) use ($callback, $callbackArgs) { |
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| 435 | 3 | return call_user_func_array($callback, $this->resolveArgs($callbackArgs, $args)); |
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| 436 | 3 | }; |
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| 437 | } else { |
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| 438 | 3 | $factory = $callback; |
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| 439 | } |
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| 440 | |||
| 441 | // If a class is specified then still reflect on it so that calls can be made against it. |
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| 442 | 6 | if (class_exists($className)) { |
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| 443 | 6 | $class = new \ReflectionClass($className); |
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| 444 | } |
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| 445 | } else { |
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| 446 | // The instance is created by newing up a class. |
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| 447 | 37 | if (!class_exists($className)) { |
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| 448 | 1 | throw new NotFoundException("Class $className does not exist.", 404); |
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| 449 | } |
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| 450 | 36 | $class = new \ReflectionClass($className); |
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| 451 | 36 | $constructor = $class->getConstructor(); |
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| 452 | |||
| 453 | 36 | if ($constructor && $constructor->getNumberOfParameters() > 0) { |
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| 454 | 33 | $constructorArgs = $this->makeDefaultArgs($constructor, (array)$rule['constructorArgs'], $rule); |
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| 455 | |||
| 456 | $factory = function ($args) use ($className, $constructorArgs) { |
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| 457 | 33 | return new $className(...array_values($this->resolveArgs($constructorArgs, $args))); |
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| 458 | 33 | }; |
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| 459 | } else { |
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| 460 | $factory = function () use ($className) { |
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| 461 | 4 | return new $className; |
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| 462 | 4 | }; |
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| 463 | } |
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| 464 | } |
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| 465 | |||
| 466 | // Add calls to the factory. |
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| 467 | 42 | if (isset($class) && !empty($rule['calls'])) { |
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| 468 | 4 | $calls = []; |
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| 469 | |||
| 470 | // Generate the calls array. |
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| 471 | 4 | foreach ($rule['calls'] as $call) { |
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| 472 | 4 | list($methodName, $args) = $call; |
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| 473 | 4 | $method = $class->getMethod($methodName); |
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| 474 | 4 | $calls[] = [$methodName, $this->makeDefaultArgs($method, $args, $rule)]; |
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| 475 | } |
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| 476 | |||
| 477 | // Wrap the factory in one that makes the calls. |
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| 478 | $factory = function ($args) use ($factory, $calls) { |
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| 479 | 4 | $instance = $factory($args); |
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| 480 | |||
| 481 | 4 | foreach ($calls as $call) { |
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| 482 | 4 | call_user_func_array( |
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| 483 | 4 | [$instance, $call[0]], |
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| 484 | 4 | $this->resolveArgs($call[1], [], $instance) |
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| 485 | ); |
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| 486 | } |
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| 487 | |||
| 488 | 4 | return $instance; |
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| 489 | 4 | }; |
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| 490 | } |
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| 491 | |||
| 492 | 42 | return $factory; |
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| 493 | } |
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| 494 | |||
| 495 | /** |
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| 496 | * Create a shared instance of a class from a rule. |
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| 497 | * |
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| 498 | * This method has the side effect of adding the new instance to the internal instances array of this object. |
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| 499 | * |
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| 500 | * @param string $nid The normalized ID of the container item. |
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| 501 | * @param array $rule The resolved rule for the ID. |
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| 502 | * @param array $args Additional arguments passed during creation. |
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| 503 | * @return object Returns the the new instance. |
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| 504 | * @throws NotFoundException Throws an exception if the class does not exist. |
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| 505 | */ |
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| 506 | 24 | private function createSharedInstance($nid, array $rule, array $args) { |
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| 507 | 24 | if (!empty($rule['factory'])) { |
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| 508 | // The instance is created with a user-supplied factory function. |
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| 509 | 3 | $callback = $rule['factory']; |
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| 510 | 3 | $function = $this->reflectCallback($callback); |
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| 511 | |||
| 512 | 3 | if ($function->getNumberOfParameters() > 0) { |
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| 513 | 1 | $callbackArgs = $this->resolveArgs( |
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| 514 | 1 | $this->makeDefaultArgs($function, (array)$rule['constructorArgs'], $rule), |
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| 515 | $args |
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| 516 | ); |
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| 517 | |||
| 518 | 1 | $this->instances[$nid] = null; // prevent cyclic dependency from infinite loop. |
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| 519 | 1 | $this->instances[$nid] = $instance = call_user_func_array($callback, $callbackArgs); |
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| 520 | } else { |
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| 521 | 2 | $this->instances[$nid] = $instance = $callback(); |
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| 522 | } |
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| 523 | |||
| 524 | // Reflect on the instance so that calls can be made against it. |
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| 525 | 3 | if (is_object($instance)) { |
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| 526 | 3 | $class = new \ReflectionClass(get_class($instance)); |
|
| 527 | } |
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| 528 | } else { |
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| 529 | 21 | $className = empty($rule['class']) ? $nid : $rule['class']; |
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| 530 | 21 | if (!class_exists($className)) { |
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| 531 | 1 | throw new NotFoundException("Class $className does not exist.", 404); |
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| 532 | } |
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| 533 | 20 | $class = new \ReflectionClass($className); |
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| 534 | 20 | $constructor = $class->getConstructor(); |
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| 535 | |||
| 536 | 20 | if ($constructor && $constructor->getNumberOfParameters() > 0) { |
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| 537 | // Instantiate the object first so that this instance can be used for cyclic dependencies. |
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| 538 | 19 | $this->instances[$nid] = $instance = $class->newInstanceWithoutConstructor(); |
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| 539 | |||
| 540 | 19 | $constructorArgs = $this->resolveArgs( |
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| 541 | 19 | $this->makeDefaultArgs($constructor, (array)$rule['constructorArgs'], $rule), |
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| 542 | $args |
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| 543 | ); |
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| 544 | 18 | $constructor->invokeArgs($instance, $constructorArgs); |
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| 545 | } else { |
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| 546 | 2 | $this->instances[$nid] = $instance = new $class->name; |
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| 547 | } |
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| 548 | } |
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| 549 | |||
| 550 | // Call subsequent calls on the new object. |
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| 551 | 22 | if (isset($class) && !empty($rule['calls'])) { |
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| 552 | 2 | foreach ($rule['calls'] as $call) { |
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| 553 | 2 | list($methodName, $args) = $call; |
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| 554 | 2 | $method = $class->getMethod($methodName); |
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| 555 | |||
| 556 | 2 | $args = $this->resolveArgs( |
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| 557 | 2 | $this->makeDefaultArgs($method, $args, $rule), |
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| 558 | 2 | [], |
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| 559 | $instance |
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| 560 | ); |
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| 561 | |||
| 562 | 2 | $method->invokeArgs($instance, $args); |
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| 563 | } |
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| 564 | } |
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| 565 | |||
| 566 | 22 | return $instance; |
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| 567 | } |
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| 568 | |||
| 569 | |||
| 570 | /** |
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| 571 | * Find the class implemented by an ID. |
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| 572 | * |
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| 573 | * This tries to see if a rule exists for a normalized ID and what class it evaluates to. |
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| 574 | * |
||
| 575 | * @param string $nid The normalized ID to look up. |
||
| 576 | * @return string|null Returns the name of the class associated with the rule or **null** if one could not be found. |
||
| 577 | */ |
||
| 578 | 6 | private function findRuleClass($nid) { |
|
| 589 | |||
| 590 | /** |
||
| 591 | * Make an array of default arguments for a given function. |
||
| 592 | * |
||
| 593 | * @param \ReflectionFunctionAbstract $function The function to make the arguments for. |
||
| 594 | * @param array $ruleArgs An array of default arguments specifically for the function. |
||
| 595 | * @param array $rule The entire rule. |
||
| 596 | * @return array Returns an array in the form `name => defaultValue`. |
||
| 597 | */ |
||
| 598 | 58 | private function makeDefaultArgs(\ReflectionFunctionAbstract $function, array $ruleArgs, array $rule = []) { |
|
| 599 | 58 | $ruleArgs = array_change_key_case($ruleArgs); |
|
| 600 | 58 | $result = []; |
|
| 601 | |||
| 602 | 58 | $pos = 0; |
|
| 603 | 58 | foreach ($function->getParameters() as $i => $param) { |
|
| 604 | 58 | $name = strtolower($param->name); |
|
| 605 | |||
| 606 | 58 | if (array_key_exists($name, $ruleArgs)) { |
|
| 607 | 3 | $value = $ruleArgs[$name]; |
|
| 608 | 56 | } elseif ($param->getClass() && isset($ruleArgs[$pos]) && |
|
| 609 | // The argument is a reference that matches the type hint. |
||
| 610 | 10 | ($ruleArgs[$pos] instanceof Reference && is_a($this->findRuleClass($ruleArgs[$pos]->getName()), $param->getClass()->getName(), true)) || |
|
| 611 | // The argument is an instance that matches the type hint. |
||
| 612 | 56 | (is_object($ruleArgs[$pos]) && is_a($ruleArgs[$pos], $param->getClass()->name)) |
|
| 613 | ) { |
||
| 614 | 4 | $value = $ruleArgs[$pos]; |
|
| 615 | 4 | $pos++; |
|
| 616 | 56 | } elseif ($param->getClass() |
|
| 617 | 56 | && ($param->getClass()->isInstantiable() || isset($this->rules[$param->getClass()->name]) || array_key_exists($param->getClass()->name, $this->instances)) |
|
| 618 | ) { |
||
| 619 | 10 | $value = new DefaultReference($this->normalizeID($param->getClass()->name)); |
|
| 620 | 55 | } elseif (array_key_exists($pos, $ruleArgs)) { |
|
| 621 | 22 | $value = $ruleArgs[$pos]; |
|
| 622 | 22 | $pos++; |
|
| 623 | 37 | } elseif ($param->isDefaultValueAvailable()) { |
|
| 624 | 30 | $value = $param->getDefaultValue(); |
|
| 625 | } else { |
||
| 626 | 7 | $value = new RequiredParameter($param); |
|
| 627 | } |
||
| 628 | |||
| 629 | 58 | $result[$name] = $value; |
|
| 630 | } |
||
| 631 | |||
| 632 | 58 | return $result; |
|
| 633 | } |
||
| 634 | |||
| 635 | /** |
||
| 636 | * Replace an array of default args with called args. |
||
| 637 | * |
||
| 638 | * @param array $defaultArgs The default arguments from {@link Container::makeDefaultArgs()}. |
||
| 639 | * @param array $args The arguments passed into a creation. |
||
| 640 | * @param mixed $instance An object instance if the arguments are being resolved on an already constructed object. |
||
| 641 | * @return array Returns an array suitable to be applied to a function call. |
||
| 642 | * @throws MissingArgumentException Throws an exception when a required parameter is missing. |
||
| 643 | */ |
||
| 644 | 58 | private function resolveArgs(array $defaultArgs, array $args, $instance = null) { |
|
| 645 | // First resolve all passed arguments so their types are known. |
||
| 646 | 58 | $args = array_map( |
|
| 647 | 58 | function ($arg) use ($instance) { |
|
| 648 | 15 | return $arg instanceof ReferenceInterface ? $arg->resolve($this, $instance) : $arg; |
|
| 649 | 58 | }, |
|
| 650 | array_change_key_case($args) |
||
| 651 | ); |
||
| 652 | |||
| 653 | 58 | $pos = 0; |
|
| 654 | 58 | foreach ($defaultArgs as $name => &$default) { |
|
| 655 | 58 | if (array_key_exists($name, $args)) { |
|
| 656 | // This is a named arg and should be used. |
||
| 657 | 2 | $value = $args[$name]; |
|
| 658 | 58 | } elseif (isset($args[$pos]) && (!($default instanceof DefaultReference) || empty($default->getClass()) || is_a($args[$pos], $default->getClass()))) { |
|
| 659 | // There is an arg at this position and it's the same type as the default arg or the default arg is typeless. |
||
| 660 | 13 | $value = $args[$pos]; |
|
| 661 | 13 | $pos++; |
|
| 662 | } else { |
||
| 663 | // There is no passed arg, so use the default arg. |
||
| 664 | 47 | $value = $default; |
|
| 665 | } |
||
| 666 | |||
| 667 | 58 | if ($value instanceof ReferenceInterface) { |
|
| 668 | 14 | $value = $value->resolve($this, $instance); |
|
| 669 | } |
||
| 670 | |||
| 671 | 56 | $default = $value; |
|
| 672 | } |
||
| 673 | |||
| 674 | 56 | return $defaultArgs; |
|
| 675 | } |
||
| 676 | |||
| 677 | /** |
||
| 678 | * Create an instance of a container item. |
||
| 679 | * |
||
| 680 | * This method either creates a new instance or returns an already created shared instance. |
||
| 681 | * |
||
| 682 | * @param string $nid The normalized ID of the container item. |
||
| 683 | * @param array $args Additional arguments to pass to the constructor. |
||
| 684 | * @return object Returns an object instance. |
||
| 685 | */ |
||
| 686 | 65 | private function createInstance($nid, array $args) { |
|
| 687 | 65 | $rule = $this->makeRule($nid); |
|
| 688 | |||
| 689 | // Cache the instance or its factory for future use. |
||
| 690 | 65 | if (empty($rule['shared'])) { |
|
| 691 | 43 | $factory = $this->makeFactory($nid, $rule); |
|
| 692 | 42 | $instance = $factory($args); |
|
| 693 | 41 | $this->factories[$nid] = $factory; |
|
| 694 | } else { |
||
| 695 | 24 | $instance = $this->createSharedInstance($nid, $rule, $args); |
|
| 696 | } |
||
| 697 | 61 | return $instance; |
|
| 698 | } |
||
| 699 | |||
| 700 | /** |
||
| 701 | * Call a callback with argument injection. |
||
| 702 | * |
||
| 703 | * @param callable $callback The callback to call. |
||
| 704 | * @param array $args Additional arguments to pass to the callback. |
||
| 705 | * @return mixed Returns the result of the callback. |
||
| 706 | * @throws ContainerException Throws an exception if the callback cannot be understood. |
||
| 707 | */ |
||
| 708 | 3 | public function call(callable $callback, array $args = []) { |
|
| 709 | 3 | $instance = null; |
|
| 710 | |||
| 711 | 3 | if (is_array($callback)) { |
|
| 712 | 1 | $function = new \ReflectionMethod($callback[0], $callback[1]); |
|
| 713 | |||
| 714 | 1 | if (is_object($callback[0])) { |
|
| 715 | 1 | $instance = $callback[0]; |
|
| 716 | } |
||
| 717 | } else { |
||
| 718 | 2 | $function = new \ReflectionFunction($callback); |
|
| 719 | } |
||
| 720 | |||
| 721 | 3 | $args = $this->resolveArgs($this->makeDefaultArgs($function, $args), [], $instance); |
|
| 722 | |||
| 723 | 3 | return call_user_func_array($callback, $args); |
|
| 724 | } |
||
| 725 | |||
| 726 | /** |
||
| 727 | * Returns true if the container can return an entry for the given identifier. Returns false otherwise. |
||
| 728 | * |
||
| 729 | * @param string $id Identifier of the entry to look for. |
||
| 730 | * |
||
| 731 | * @return boolean |
||
| 732 | */ |
||
| 733 | 5 | public function has($id) { |
|
| 738 | |||
| 739 | /** |
||
| 740 | * Determines whether a rule has been defined at a given ID. |
||
| 741 | * |
||
| 742 | * @param string $id Identifier of the entry to look for. |
||
| 743 | * @return bool Returns **true** if a rule has been defined or **false** otherwise. |
||
| 744 | */ |
||
| 745 | 4 | public function hasRule($id) { |
|
| 749 | |||
| 750 | /** |
||
| 751 | * Returns true if the container already has an instance for the given identifier. Returns false otherwise. |
||
| 752 | * |
||
| 753 | * @param string $id Identifier of the entry to look for. |
||
| 754 | * |
||
| 755 | * @return bool |
||
| 756 | */ |
||
| 757 | 1 | public function hasInstance($id) { |
|
| 762 | |||
| 763 | /** |
||
| 764 | * Finds an entry of the container by its identifier and returns it. |
||
| 765 | * |
||
| 766 | * @param string $id Identifier of the entry to look for. |
||
| 767 | * |
||
| 768 | * @throws NotFoundException No entry was found for this identifier. |
||
| 769 | * @throws ContainerException Error while retrieving the entry. |
||
| 770 | * |
||
| 771 | * @return mixed Entry. |
||
| 772 | */ |
||
| 773 | 57 | public function get($id) { |
|
| 776 | |||
| 777 | /** |
||
| 778 | * Determine the reflection information for a callback. |
||
| 779 | * |
||
| 780 | * @param callable $callback The callback to reflect. |
||
| 781 | * @return \ReflectionFunctionAbstract Returns the reflection function for the callback. |
||
| 782 | */ |
||
| 783 | 9 | private function reflectCallback(callable $callback) { |
|
| 790 | } |
||
| 791 |
Loading history...
This check looks for
@paramannotations where the type inferred by our type inference engine differs from the declared type.It makes a suggestion as to what type it considers more descriptive.
Most often this is a case of a parameter that can be null in addition to its declared types.