<?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:----MzAyNDgzOTgxODI0NDM5NiA1NDM4MzE4NjcyMTYyMDk0IDM3MTk1MDgyMTU5NTQ1NTA=