CodeUnitCollection.php
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CodeUnitCollection.php
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	<?php declare(strict_types=1);
	/*
	* This file is part of sebastian/code-unit.
	*
	* (c) Sebastian Bergmann <sebastian@phpunit.de>
	*
	* For the full copyright and license information, please view the LICENSE
	* file that was distributed with this source code.
	*/
	namespace SebastianBergmann\CodeUnit;

	use function array_merge;
	use function count;
	use Countable;
	use IteratorAggregate;

	final class CodeUnitCollection implements Countable, IteratorAggregate
	{
	/**
	* @psalm-var list<CodeUnit>
	*/
	private $codeUnits = [];

	/**
	* @psalm-param list<CodeUnit> $items
	*/
	public static function fromArray(array $items): self
	{
	$collection = new self;

	foreach ($items as $item) {
	$collection->add($item);
	}

	return $collection;
	}

	public static function fromList(CodeUnit ...$items): self
	{
	return self::fromArray($items);
	}

	private function __construct()
	{
	}

	/**
	* @psalm-return list<CodeUnit>
	*/
	public function asArray(): array
	{
	return $this->codeUnits;
	}

	public function getIterator(): CodeUnitCollectionIterator
	{
	return new CodeUnitCollectionIterator($this);
	}

	public function count(): int
	{
	return count($this->codeUnits);
	}

	public function isEmpty(): bool
	{
	return empty($this->codeUnits);
	}

	public function mergeWith(self $other): self
	{
	return self::fromArray(
	array_merge(
	$this->asArray(),
	$other->asArray()
	)
	);
	}

	private function add(CodeUnit $item): void
	{
	$this->codeUnits[] = $item;
	}
	}