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<?php
namespace PhpZip\Extra\Fields;
use PhpZip\Exception\ZipException;
use PhpZip\Extra\ExtraField;
/**
* Default implementation for an Extra Field in a Local or Central Header of a
* ZIP file.
*
* @author Ne-Lexa alexey@nelexa.ru
* @license MIT
*/
class DefaultExtraField implements ExtraField
{
/**
* @var int
*/
private static $headerId;
/**
* @var string
*/
protected $data;
/**
* Constructs a new Extra Field.
*
* @param int $headerId an unsigned short integer (two bytes) indicating the
* type of the Extra Field.
* @throws ZipException
*/
public function __construct($headerId)
{
if (0x0000 > $headerId || $headerId > 0xffff) {
throw new ZipException('headerId out of range');
}
self::$headerId = $headerId;
}
/**
* Returns the Header ID (type) of this Extra Field.
* The Header ID is an unsigned short integer (two bytes)
* which must be constant during the life cycle of this object.
*
* @return int
*/
public static function getHeaderId()
{
return self::$headerId & 0xffff;
}
/**
* Serializes a Data Block.
* @return string
*/
public function serialize()
{
return $this->data;
}
/**
* Initializes this Extra Field by deserializing a Data Block.
* @param string $data
*/
public function deserialize($data)
{
$this->data = $data;
}
}
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