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<?php declare(strict_types=1);
namespace OpenCloud\Common;
/**
* Encapsulates common logic for classes which implement the SPL \ArrayAccess interface.
*
* @package OpenCloud\Common
*/
trait ArrayAccessTrait
{
/**
* The internal state that this object represents
*
* @var array
*/
private $internalState = [];
/**
* Sets an internal key with a value.
*
* @param string $offset
* @param mixed $value
*/
public function offsetSet($offset, $value)
{
if (null === $offset) {
$this->internalState[] = $value;
} else {
$this->internalState[$offset] = $value;
}
}
/**
* Checks whether an internal key exists.
*
* @param string $offset
*
* @return bool
*/
public function offsetExists(string $offset): bool
{
return isset($this->internalState[$offset]);
}
/**
* Unsets an internal key.
*
* @param string $offset
*/
public function offsetUnset(string $offset)
{
unset($this->internalState[$offset]);
}
/**
* Retrieves an internal key.
*
* @param string $offset
*
* @return mixed|null
*/
public function offsetGet(string $offset)
{
return $this->offsetExists($offset) ? $this->internalState[$offset] : null;
}
}
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