Graze\DataFlow\Flow\Collection\Filter

Complexity

Total Complexity

3

Size/Duplication

Total Lines	29
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	2

Test Coverage

Coverage

100%

Importance

Changes	1
Bugs	0	Features	0

2 Methods

Rating	Name	Duplication	Size	Complexity
A	__construct()	0	4	1
A	flow()	0	8	2

<?php
/**
 * This file is part of graze/data-flow
 *
 * Copyright (c) 2016 Nature Delivered Ltd. <https://www.graze.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 *
 * @license https://github.com/graze/data-flow/blob/master/LICENSE.md
 * @link    https://github.com/graze/data-flow
 */

namespace Graze\DataFlow\Flow\Collection;

use Graze\DataFlow\Flow\AbstractFlow;
use Graze\DataNode\NodeCollectionInterface;
use Graze\DataNode\NodeInterface;
use InvalidArgumentException;

/**
 * Return only the entries in a NodeCollection that match the Filter callback provided
 */
class Filter extends AbstractFlow
{
    /**
     * @var callable
     */
    private $callback;

    /**
     * First constructor.
     *
     * @param callable $callback
     */
    public function __construct(callable $callback)
    {
        $this->callback = $callback;
    }

    /**
     * @inheritDoc
     */
    public function flow(NodeInterface $node)
    {
        if (!($node instanceof NodeCollectionInterface)) {
            throw new InvalidArgumentException("The supplied $node is not a NodeCollectionInterface");
        }

        return $node->filter($this->callback);
    }
}