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<?php
/*
* This file is part of the League\Fractal package.
*
* (c) Phil Sturgeon <me@philsturgeon.uk>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace League\Fractal;
/**
* A handy interface for getting at include parameters.
*/
class ParamBag implements \ArrayAccess, \IteratorAggregate
{
/**
* @var array
*/
protected $params = [];
/**
* Create a new parameter bag instance.
*
* @param array $params
*
* @return void
*/
public function __construct(array $params)
{
$this->params = $params;
}
/**
* Get parameter values out of the bag.
*
* @param string $key
*
* @return mixed
*/
public function get($key)
{
return $this->__get($key);
}
/**
* Get parameter values out of the bag via the property access magic method.
*
* @param string $key
*
* @return mixed
*/
public function __get($key)
{
return isset($this->params[$key]) ? $this->params[$key] : null;
}
/**
* Check if a param exists in the bag via an isset() check on the property.
*
* @param string $key
*
* @return bool
*/
public function __isset($key)
{
return isset($this->params[$key]);
}
/**
* Disallow changing the value of params in the data bag via property access.
*
* @param string $key
* @param mixed $value
*
* @throws \LogicException
*
* @return void
*/
public function __set($key, $value)
{
throw new \LogicException('Modifying parameters is not permitted');
}
/**
* Disallow unsetting params in the data bag via property access.
*
* @param string $key
*
* @throws \LogicException
*
* @return void
*/
public function __unset($key)
{
throw new \LogicException('Modifying parameters is not permitted');
}
/**
* Check if a param exists in the bag via an isset() and array access.
*
* @param string $key
*
* @return bool
*/
public function offsetExists($key)
{
return $this->__isset($key);
}
/**
* Get parameter values out of the bag via array access.
*
* @param string $key
*
* @return mixed
*/
public function offsetGet($key)
{
return $this->__get($key);
}
/**
* Disallow changing the value of params in the data bag via array access.
*
* @param string $key
* @param mixed $value
*
* @throws \LogicException
*
* @return void
*/
public function offsetSet($key, $value)
{
throw new \LogicException('Modifying parameters is not permitted');
}
/**
* Disallow unsetting params in the data bag via array access.
*
* @param string $key
*
* @throws \LogicException
*
* @return void
*/
public function offsetUnset($key)
{
throw new \LogicException('Modifying parameters is not permitted');
}
/**
* IteratorAggregate for iterating over the object like an array.
*
* @return \ArrayIterator
*/
public function getIterator()
{
return new \ArrayIterator($this->params);
}
}
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