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<?php |
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namespace GenericCollections; |
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use GenericCollections\Exceptions\TypePropertyException; |
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use GenericCollections\Utils\TypeProperty; |
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/** |
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* Concrete TypedStruct implementation. This class is like a HHVM Shape. |
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* All defined keys can be accessed as properties or array. |
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* It will throw a TypePropertyException if you try to set a value that does not match the definition type |
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* |
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* You can use this as a direct object like: |
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* ```php |
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* $obj = new TypedStruct( |
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* ['id' => 'int', 'name' => 'string'], |
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* ['id' => 1, 'name' => 'Foo Bar] |
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* ); |
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* echo $obj['name']; // Foo Bar |
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* ``` |
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* |
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* Or you can inherith from this class to your own definition |
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* ```php |
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* class UserData extends TypedStruct |
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* { |
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* public function __construct(array $values = []) |
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* { |
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* $definitions = ['id' => 'int', 'name' => 'string']; |
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* parent::__construct($definitions, $values); |
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* } |
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* } |
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* $user = new UserData(['id' => 10]); |
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* echo $obj['id']; // 10 |
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* ``` |
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* |
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* @package GenericCollections |
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*/ |
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class TypedStruct implements \ArrayAccess, \IteratorAggregate, \Countable |
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{ |
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/** |
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* @var TypeProperty[] Definition of the (string) key => (string) type |
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*/ |
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protected $definitions = []; |
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/** |
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* @var array |
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*/ |
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protected $values = []; |
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/** |
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* TypedStruct constructor. |
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* @param string[] $definitions |
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* @param array $values |
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*/ |
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public function __construct(array $definitions, array $values = []) |
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{ |
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foreach ($definitions as $key => $type) { |
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if (is_int($key)) { |
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$key = $type; |
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$type = 'mixed'; |
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} |
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if (! is_string($key)) { |
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throw new \InvalidArgumentException('Invalid definition key found'); |
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} |
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if (! is_string($type)) { |
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throw new \InvalidArgumentException('Invalid definition type found'); |
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} |
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$this->definitions[$key] = new TypeProperty($type, true); |
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$this->values[$key] = null; |
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} |
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$this->setValues($values); |
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} |
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/** |
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* @return TypeProperty[] Get an array with all definitions |
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*/ |
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public function getDefinitions() |
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{ |
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return $this->definitions; |
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} |
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/** |
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* Retrieve a definition object |
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* @param string $key |
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* @return TypeProperty |
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* @throws \InvalidArgumentException if key is not found |
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*/ |
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public function getDefinition($key) |
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{ |
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$this->checkDefinitionExists($key); |
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return $this->definitions[$key]; |
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} |
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/** |
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* Set all the values from the array to the local object |
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* If the key is not found then it is just ignored |
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* |
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* @param array $values |
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*/ |
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public function setValues(array $values) |
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{ |
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foreach ($values as $key => $value) { |
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if ($this->exists($key)) { |
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$this->set($key, $value); |
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} |
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} |
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} |
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/** |
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* Set the value for a key, this will check that the value is the same type of the definition |
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* |
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* @param string $key |
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* @param mixed $value |
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* @throws \InvalidArgumentException if key is not found |
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* @throws TypePropertyException if the value does not match the defined type |
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*/ |
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public function set($key, $value) |
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{ |
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$definition = $this->getDefinition($key); |
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if (! $definition->check($value)) { |
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throw new TypePropertyException("Definition '$key' only allows type '{$definition->getType()}'"); |
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} |
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$this->values[$key] = $value; |
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} |
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/** |
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* Return TRUE if the key exists |
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* |
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* @param string $key |
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* @return bool |
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*/ |
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public function exists($key) |
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{ |
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return array_key_exists($key, $this->definitions); |
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} |
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/** |
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* Return the value of a key |
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* @param string $key |
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* @return mixed |
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* @throws \InvalidArgumentException if key is not found |
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*/ |
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public function get($key) |
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{ |
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$this->checkDefinitionExists($key); |
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return $this->values[$key]; |
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} |
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/** |
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* Return an array with the key and values |
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* |
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* @return array |
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*/ |
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public function getValues() |
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{ |
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return $this->values; |
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} |
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/** |
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* Utility function that throws an exception if the key is not found |
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* @param string $key |
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*/ |
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protected function checkDefinitionExists($key) |
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{ |
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if (! array_key_exists($key, $this->definitions)) { |
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throw new \InvalidArgumentException("Definition '$key' does not exists"); |
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} |
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} |
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public function __get($name) |
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{ |
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return $this->get($name); |
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} |
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public function __set($name, $value) |
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{ |
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$this->set($name, $value); |
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} |
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public function __isset($name) |
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{ |
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return isset($this->values[$name]); |
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} |
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public function __unset($name) |
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{ |
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$this->set($name, null); |
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} |
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public function offsetExists($offset) |
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{ |
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return isset($this->values[$offset]); |
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} |
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public function offsetGet($offset) |
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{ |
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return $this->get($offset); |
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} |
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public function offsetSet($offset, $value) |
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{ |
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$this->set($offset, $value); |
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} |
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public function offsetUnset($offset) |
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{ |
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$this->set($offset, null); |
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} |
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public function getIterator() |
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{ |
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return new \ArrayIterator($this->values); |
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} |
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public function count() |
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{ |
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return count($this->values); |
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} |
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} |
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