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<?php
/*
* This file is part of the xAPI package.
*
* (c) Christian Flothmann <christian.flothmann@xabbuh.de>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Xabbuh\XApi\Model;
use Xabbuh\XApi\Common\Exception\UnsupportedOperationException;
/**
* An xAPI document's data.
*
* Document data are immutable. This means that they can be accessed like an array.
* But you can only do this to read data. Thus an {@link UnsupportedOperationException}
* is thrown when you try to unset data or to manipulate them.
*
* @author Christian Flothmann <christian.flothmann@xabbuh.de>
*/
final class DocumentData implements \ArrayAccess
{
private $data = array();
public function __construct(array $data = array())
{
$this->data = $data;
}
/**
* {@inheritDoc}
*/
public function offsetExists($offset): bool
{
return isset($this->data[$offset]);
}
/**
* {@inheritDoc}
*/
public function offsetGet($offset)
{
if (!isset($this->data[$offset])) {
throw new \InvalidArgumentException(sprintf('No data for name "%s" registered.', $offset));
}
return $this->data[$offset];
}
/**
* {@inheritDoc}
*
* @throws UnsupportedOperationException Documents are immutable
*/
public function offsetSet($offset, $value): void
{
throw new UnsupportedOperationException('A document is immutable.');
}
/**
* {@inheritDoc}
*
* @throws UnsupportedOperationException Documents are immutable
*/
public function offsetUnset($offset): void
{
throw new UnsupportedOperationException('A document is immutable.');
}
/**
* Returns all data as an array.
*/
public function getData(): array
{
return $this->data;
}
}
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