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<?php |
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/** |
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* @author Anton Lytkin <[email protected]> |
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* @license MIT |
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*/ |
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namespace WS\Utils\Collections; |
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use ArrayIterator; |
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use RuntimeException; |
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class HashMap implements Map |
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{ |
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private $entries = []; |
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public function put($key, $value): bool |
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{ |
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$this->entries[$this->getKeyHash($key)] = new MapEntry($key, $value); |
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return true; |
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} |
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public function getIterator() |
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{ |
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return new class($this->entries) extends ArrayIterator { |
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private $entries; |
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public function __construct(array $entries) |
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{ |
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$hashToValueArray = array_map(static function (MapEntry $entry) { |
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return $entry->getValue(); |
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}, $entries); |
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parent::__construct($hashToValueArray); |
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$this->entries = $entries; |
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} |
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public function key() |
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{ |
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$arrayKey = parent::key(); |
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/** @var MapEntry $entry */ |
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$entry = $this->entries[$arrayKey]; |
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return $entry->getKey(); |
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} |
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}; |
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} |
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public function values(): Collection |
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{ |
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$values = []; |
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/** @var MapEntry $entry */ |
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foreach ($this->entries as $entry) { |
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$values[] = $entry->getValue(); |
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} |
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return new ArrayList($values); |
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} |
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public function keys(): Collection |
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{ |
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$keys = []; |
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/** @var MapEntry $entry */ |
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foreach ($this->entries as $entry) { |
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$keys[] = $entry->getKey(); |
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} |
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return new ArrayList($keys); |
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} |
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/** |
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* @param $key |
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* @return string |
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*/ |
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private function getKeyHash($key): string |
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{ |
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if (is_scalar($key)) { |
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return $key.''; |
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} |
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if ($key instanceof HashCodeAware) { |
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return $key->getHashCode(); |
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} |
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if (is_object($key)) { |
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return spl_object_hash($key); |
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} |
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if ($key === null) { |
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return '__NULL__'; |
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} |
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if (is_array($key)) { |
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return md5(json_encode($key)); |
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} |
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throw new RuntimeException("The type of $key is not supported"); |
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} |
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public function remove($key): bool |
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{ |
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$res = $this->containsKey($key); |
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if (!$res) { |
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return false; |
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} |
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unset($this->entries[$this->getKeyHash($key)]); |
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return true; |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function containsKey($key): bool |
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{ |
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return isset($this->entries[$this->getKeyHash($key)]); |
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} |
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public function size(): int |
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{ |
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return count($this->entries); |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function get($key) |
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{ |
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if (!$this->containsKey($key)) { |
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return null; |
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} |
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$entry = $this->entries[$this->getKeyHash($key)]; |
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return $entry->getValue(); |
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} |
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/** |
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* @inheritDoc |
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*/ |
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1 |
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public function containsValue($tested): bool |
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{ |
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foreach ($this->entries as $entry) { |
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if ($entry->getValue() === $tested) { |
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return true; |
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} |
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} |
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return false; |
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} |
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1 |
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public function stream(): Stream |
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{ |
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1 |
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return new SerialStream(CollectionFactory::from(array_values($this->entries))); |
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} |
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} |
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worksolutions /
php-collections
