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Filename : NullOutputFormatter.php
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<?php

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

namespace Symfony\Component\Console\Formatter;

/**
 * @author Tien Xuan Vo <tien.xuan.vo@gmail.com>
 */
final class NullOutputFormatter implements OutputFormatterInterface
{
    private $style;

    /**
     * {@inheritdoc}
     */
    public function format(?string $message): void
    {
        // do nothing
    }

    /**
     * {@inheritdoc}
     */
    public function getStyle(string $name): OutputFormatterStyleInterface
    {
        if ($this->style) {
            return $this->style;
        }
        // to comply with the interface we must return a OutputFormatterStyleInterface
        return $this->style = new NullOutputFormatterStyle();
    }

    /**
     * {@inheritdoc}
     */
    public function hasStyle(string $name): bool
    {
        return false;
    }

    /**
     * {@inheritdoc}
     */
    public function isDecorated(): bool
    {
        return false;
    }

    /**
     * {@inheritdoc}
     */
    public function setDecorated(bool $decorated): void
    {
        // do nothing
    }

    /**
     * {@inheritdoc}
     */
    public function setStyle(string $name, OutputFormatterStyleInterface $style): void
    {
        // do nothing
    }
}