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<?php
/**
* PHP OpenCloud library.
*
* @copyright 2014 Rackspace Hosting, Inc. See LICENSE for information.
* @license https://www.apache.org/licenses/LICENSE-2.0
* @author Jamie Hannaford <jamie.hannaford@rackspace.com>
*/
namespace OpenCloud\Common\Collection;
use Countable;
use ArrayAccess;
/**
* A generic, abstract collection class that allows collections to exhibit array functionality.
*
* @package OpenCloud\Common\Collection
* @since 1.8.0
*/
abstract class ArrayCollection implements ArrayAccess, Countable
{
/**
* @var array The elements being held by this iterator.
*/
protected $elements;
/**
* @param array $data
*/
public function __construct(array $data = array())
{
$this->setElements($data);
}
/**
* @return int
*/
public function count()
{
return count($this->elements);
}
/**
* @param array $data
* @return $this
*/
public function setElements(array $data = array())
{
$this->elements = $data;
return $this;
}
/**
* Sets a value to a particular offset.
*
* @param mixed $offset
* @param mixed $value
*/
public function offsetSet($offset, $value)
{
$this->elements[$offset] = $value;
}
/**
* Appends a value to the container.
*
* @param $value
*/
public function append($value)
{
$this->elements[] = $value;
}
/**
* Checks to see whether a particular offset key exists.
*
* @param mixed $offset
* @return bool
*/
public function offsetExists($offset)
{
return isset($this->elements[$offset]);
}
/**
* Checks to see whether a particular value exists.
*
* @param $value
* @return bool
*/
public function valueExists($value)
{
return array_search($value, $this->elements) !== false;
}
/**
* Unset a particular key.
*
* @param mixed $offset
*/
public function offsetUnset($offset)
{
unset($this->elements[$offset]);
}
/**
* Get the value for a particular offset key.
*
* @param mixed $offset
* @return mixed|null
*/
public function offsetGet($offset)
{
return $this->offsetExists($offset) ? $this->elements[$offset] : null;
}
}
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