Implementing Finite in Eloquent

EloquentFinite.php

<?php

use Finite\StateMachine\StateMachine;
use Finite\State\State;
use Finite\State\StateInterface;

trait EloquentFinite
{
    protected $states           = [];
    protected $transitions      = [];
    protected $state_machine;

    public function setFiniteState($state)
    {
        $this->attributes['state'] = $state;
    }

    public function getFiniteState($state)
    {
        return $this->attributes['state'];
    }

    public function bootEloquentFinite()
    {
        if(count($this->states) == 0) {
            throw new Exception("No states define", 1);
        }

        if(count($this->transitions) == 0) {
            throw new Exception("No transition define", 1);
        }

        $this->state_machine = new StateMachine();

        $this->state_machine->addState(new State($this->states[0]), StateInterface::TYPE_INITIAL);
        foreach(array_slice($this->states, 1) as $state) {
            $this->state_machine->addState($state);
        }

        foreach($this->transitions as $transition) {
            $this->state_machine->addTransition($transition['name'], $transition['from'], $transition['to']);
        }

        $this->state_machine->setObject($this);
        $this->state_machine->initialize();
    }
}