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<?php |
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namespace StraTDeS\VO\Collection; |
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use ArrayAccess; |
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use Countable; |
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use InvalidArgumentException; |
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use Iterator; |
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abstract class AbstractCollection implements Countable, ArrayAccess, Iterator |
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{ |
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protected array $items; |
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protected int $position; |
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protected function __construct() |
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{ |
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$this->items = []; |
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$this->position = 0; |
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} |
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public static function create(): AbstractCollection |
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{ |
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return new static(); |
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} |
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public function items(): array |
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{ |
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return $this->items; |
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} |
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public function count(): int |
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{ |
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return count($this->items); |
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} |
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public function offsetExists($offset): bool |
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{ |
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return isset($this->items[$offset]); |
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} |
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public function offsetGet($offset) |
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{ |
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return $this->items[$offset]; |
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} |
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public function offsetSet($offset, $value) |
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{ |
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$this->checkValueIsValidForCollection($value); |
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$this->items[$offset] = $value; |
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} |
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public function offsetUnset($offset) |
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{ |
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unset($this->items[$offset]); |
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} |
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protected function checkValueIsValidForCollection($value): void |
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{ |
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if (get_class($value) != $this->itemClass() && !is_subclass_of($value, $this->itemClass())) { |
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throw new InvalidArgumentException("Provided value is not a valid {$this->itemClass()}"); |
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} |
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} |
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public function current() |
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{ |
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return $this->items[$this->position]; |
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} |
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public function next(): void |
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{ |
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$this->position++; |
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} |
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public function key(): int |
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{ |
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return $this->position; |
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} |
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public function valid(): bool |
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{ |
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return isset($this->items[$this->position]); |
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} |
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public function rewind(): void |
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{ |
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$this->position = 0; |
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} |
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public function add($item): AbstractCollection |
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{ |
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$this->checkValueIsValidForCollection($item); |
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$this->items[] = $item; |
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return $this; |
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} |
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abstract protected function itemClass(): string; |
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} |
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stratdes /
vo
