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<?php |
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/** @noinspection ClassReImplementsParentInterfaceInspection */ |
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/** |
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* @author Maxim Sokolovsky |
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*/ |
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namespace WS\Utils\Collections; |
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use ArrayIterator; |
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class HashSet implements Set |
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{ |
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/** |
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* @var HashMap |
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*/ |
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private $internalMap; |
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public function __construct(?array $elements = null) |
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{ |
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$this->internalMap = new HashMap(); |
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if ($elements !== null) { |
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foreach ($elements as $element) { |
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$this->add($element); |
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} |
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} |
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} |
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public function add($element): bool |
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{ |
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return $this->internalMap->put($element, null); |
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} |
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public function stream(): Stream |
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{ |
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return new SerialStream($this); |
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} |
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public function merge(Collection $collection): bool |
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{ |
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foreach ($collection as $item) { |
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$this->add($item); |
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} |
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return true; |
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} |
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public function clear(): void |
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{ |
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$this->internalMap = new HashMap(); |
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} |
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public function remove($element): bool |
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{ |
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return $this->internalMap->remove($element); |
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} |
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public function contains($element): bool |
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{ |
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return $this->internalMap->containsKey($element); |
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} |
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public function equals(Collection $collection): bool |
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{ |
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if ($this->size() !== $collection->size()) { |
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return false; |
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} |
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foreach ($collection as $item) { |
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if (!$this->contains($item)) { |
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return false; |
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} |
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} |
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return true; |
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} |
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public function size(): int |
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{ |
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return $this->internalMap->size(); |
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} |
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public function isEmpty(): bool |
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{ |
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return $this->size() === 0; |
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} |
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public function toArray(): array |
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{ |
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return $this->internalMap->keys()->toArray(); |
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} |
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public function copy(): Collection |
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{ |
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return new static($this->toArray()); |
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} |
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public function getIterator() |
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{ |
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return new ArrayIterator($this->toArray()); |
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} |
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public function addAll(iterable $elements): bool |
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{ |
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$res = true; |
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foreach ($elements as $element) { |
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!$this->add($element) && $res = false; |
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} |
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return $res; |
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} |
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} |
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worksolutions /
php-collections
