Dutek\Iterator\MapIterator

Complexity

Total Complexity

4

Size/Duplication

Total Lines	29
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	0

Test Coverage

Coverage

100%

Importance

Changes

0

3 Methods

Rating	Name	Duplication	Size	Complexity
A	__construct()	0	5	1
A	current()	0	9	2
A	next()	0	6	1

<?php
/**
 * This file is part of the iterators package.
 *
 * Copyright (c) Dusan Vejin
 *
 * For full copyright and license information, please refer to the LICENSE file,
 * located at the package root folder.
 */

declare(strict_types=1);

namespace Dutek\Iterator;

final class MapIterator extends \IteratorIterator
{
    protected $callback;
    protected $callbackResult;
    protected $callbackResultCached;

    public function __construct(\Iterator $iterator, callable $callback)
    {
        parent::__construct($iterator);
        $this->callback = $callback;
    }

    public function current()
    {
        if (!$this->callbackResultCached) {
            $this->callbackResult = ($this->callback)(parent::current());
            $this->callbackResultCached = true;
        }

        return $this->callbackResult;
    }

    public function next()
    {
        parent::next();
        $this->callbackResult = null;
        $this->callbackResultCached = false;
    }
}