Fp\Reducer\Batching

Complexity

Total Complexity

7

Size/Duplication

Total Lines	43
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	1

Test Coverage

Coverage

95%

Importance

Changes	2
Bugs	0	Features	0

4 Methods

Rating	Name	Duplication	Size	Complexity
A	__construct()	0	9	2
A	init()	0	4	1
A	step()	0	12	2
A	complete()	0	8	2

<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Arnaud LEMAIRE  <alemaire@ibsciss.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Fp\Reducer;

class Batching implements Reducer
{
    protected $next_reducer;
    protected $batch_size;
    protected $current_batch = [];

    public function __construct(Reducer $next_reducer, $batch_size)
    {
        if (!is_int($batch_size)) {
            throw \InvalidArgumentException('argument #2 of Batching::__construct must be an integer');
        }

        $this->batch_size = $batch_size;
        $this->next_reducer = $next_reducer;
    }

    public function init()
    {
        return $this->next_reducer->init();
    }

    public function step($result, $current)
    {
        $this->current_batch[] = $current;
        if (count($this->current_batch) >= $this->batch_size) {
            $batch = $this->current_batch;
            $this->current_batch = [];

            return $this->next_reducer->step($result, $batch);
        }

        return $result;
    }

    public function complete($result)
    {
        if (count($this->current_batch) > 0) {
            $result = $this->next_reducer->step($result, $this->current_batch);
        }

        return $this->next_reducer->complete($result);
    }
}