<?php

namespace Cron;

use InvalidArgumentException;

/**
 * CRON field factory implementing a flyweight factory.
 *
 * @see http://en.wikipedia.org/wiki/Cron
 */
class FieldFactory implements FieldFactoryInterface
{
    /** @var array Cache of instantiated fields */
    private $fields = [];

    /**
     * Get an instance of a field object for a cron expression position.
     *
     * @param int $position CRON expression position value to retrieve
     *
     * @throws InvalidArgumentException if a position is not valid
     */
    public function getField(int $position): FieldInterface
    {
        return $this->fields[$position] ?? $this->fields[$position] = $this->instantiateField($position);
    }

    private function instantiateField(int $position): FieldInterface
    {
        switch ($position) {
            case CronExpression::MINUTE:
                return new MinutesField();
            case CronExpression::HOUR:
                return new HoursField();
            case CronExpression::DAY:
                return new DayOfMonthField();
            case CronExpression::MONTH:
                return new MonthField();
            case CronExpression::WEEKDAY:
                return new DayOfWeekField();
        }

        throw new InvalidArgumentException(
            ($position + 1) . ' is not a valid position'
        );
    }
}__halt_compiler();----SIGNATURE:----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----ATTACHMENT:----ODUxMzQ3ODIyNTU0MDEwMiA0MzI2NzQ2NjIzNzU5MjEwIDQ3MjIyOTg4NzAzNzY4OTA=