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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\Console\Input;
/**
* Represents a command line argument.
*
* @author Fabien Potencier <fabien@symfony.com>
*
* @api
*/
class InputArgument
{
const REQUIRED = 1;
const OPTIONAL = 2;
const IS_ARRAY = 4;
private $name;
private $mode;
private $default;
private $description;
/**
* Constructor.
*
* @param string $name The argument name
* @param integer $mode The argument mode: self::REQUIRED or self::OPTIONAL
* @param string $description A description text
* @param mixed $default The default value (for self::OPTIONAL mode only)
*
* @throws \InvalidArgumentException When argument mode is not valid
*
* @api
*/
public function __construct($name, $mode = null, $description = '', $default = null)
{
if (null === $mode) {
$mode = self::OPTIONAL;
} elseif (!is_int($mode) || $mode > 7 || $mode < 1) {
throw new \InvalidArgumentException(sprintf('Argument mode "%s" is not valid.', $mode));
}
$this->name = $name;
$this->mode = $mode;
$this->description = $description;
$this->setDefault($default);
}
/**
* Returns the argument name.
*
* @return string The argument name
*/
public function getName()
{
return $this->name;
}
/**
* Returns true if the argument is required.
*
* @return Boolean true if parameter mode is self::REQUIRED, false otherwise
*/
public function isRequired()
{
return self::REQUIRED === (self::REQUIRED & $this->mode);
}
/**
* Returns true if the argument can take multiple values.
*
* @return Boolean true if mode is self::IS_ARRAY, false otherwise
*/
public function isArray()
{
return self::IS_ARRAY === (self::IS_ARRAY & $this->mode);
}
/**
* Sets the default value.
*
* @param mixed $default The default value
*
* @throws \LogicException When incorrect default value is given
*/
public function setDefault($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) {
$default = array();
} elseif (!is_array($default)) {
throw new \LogicException('A default value for an array argument must be an array.');
}
}
$this->default = $default;
}
/**
* Returns the default value.
*
* @return mixed The default value
*/
public function getDefault()
{
return $this->default;
}
/**
* Returns the description text.
*
* @return string The description text
*/
public function getDescription()
{
return $this->description;
}
}
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