InputArgument.php

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<?php
 
namespace Symfony\Component\Console\Input;
 
/*
 * This file is part of the Symfony framework.
 *
 * (c) Fabien Potencier <fabien.potencier@symfony-project.com>
 *
 * This source file is subject to the MIT license that is bundled
 * with this source code in the file LICENSE.
 */
 
class InputArgument
{
    const REQUIRED = 1;
    const OPTIONAL = 2;
    const IS_ARRAY = 4;
 
    protected $name;
    protected $mode;
    protected $default;
    protected $description;
 
    public function __construct($name, $mode = null, $description = '', $default = null)
    {
        if (null === $mode) {
            $mode = self::OPTIONAL;
        } else if (is_string($mode) || $mode > 7) {
            throw new \InvalidArgumentException(sprintf('Argument mode "%s" is not valid.', $mode));
        }
 
        $this->name        = $name;
        $this->mode        = $mode;
        $this->description = $description;
 
        $this->setDefault($default);
    }
 
    public function getName()
    {
        return $this->name;
    }
 
    public function isRequired()
    {
        return self::REQUIRED === (self::REQUIRED & $this->mode);
    }
 
    public function isArray()
    {
        return self::IS_ARRAY === (self::IS_ARRAY & $this->mode);
    }
 
    public function setDefault($default = null)
    {
        if (self::REQUIRED === $this->mode && null !== $default) {
            throw new \LogicException('Cannot set a default value except for Parameter::OPTIONAL mode.');
        }
 
        if ($this->isArray()) {
            if (null === $default) {
                $default = array();
            } else if (!is_array($default)) {
                throw new \LogicException('A default value for an array argument must be an array.');
            }
        }
 
        $this->default = $default;
    }
 
    public function getDefault()
    {
        return $this->default;
    }
 
    public function getDescription()
    {
        return $this->description;
    }
}