Railt\Lexer\Driver\MultistateLexer

Complexity

Total Complexity

4

Size/Duplication

Total Lines	52
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	1

Importance

Changes

0

3 Methods

Rating	Name	Duplication	Size	Complexity
A	state()	0	10	2
A	getTokenState()	0	4	1
A	getNextState()	0	4	1

<?php
/**
 * This file is part of Railt package.
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */
declare(strict_types=1);

namespace Railt\Lexer\Driver;

use Railt\Lexer\MultistateLexerInterface;

/**
 * Class MultistateLexer
 */
abstract class MultistateLexer extends Lexer implements MultistateLexerInterface
{
    /**
     * @var int
     */
    protected const DEFAULT_STATE = 0x00;

    /**
     * @var array|int[]
     */
    protected $states = [];

    /**
     * @var array|int[]
     */
    protected $transitions = [];

    /**
     * @param string $token
     * @param int $state
     * @param int|null $nextState
     * @return MultistateLexerInterface
     */
    public function state(string $token, int $state, int $nextState = null): MultistateLexerInterface
    {
        $this->states[$token] = $state;

        if ($nextState !== null) {
            $this->transitions[$token] = $nextState;
        }

        return $this;
    }

    /**
     * @param string $token
     * @return int
     */
    protected function getTokenState(string $token): int
    {
        return $this->states[$token] ?? static::DEFAULT_STATE;
    }

    /**
     * @param string $token
     * @return int
     */
    protected function getNextState(string $token): int
    {
        return $this->transitions[$this->getTokenState($token)] ?? static::DEFAULT_STATE;
    }
}