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<?php |
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/** |
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* This file is part of the miBadger package. |
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* |
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* @author Michael Webbers <[email protected]> |
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* @license http://opensource.org/licenses/Apache-2.0 Apache v2 License |
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*/ |
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namespace miBadger\Http; |
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use Psr\Http\Message\StreamInterface; |
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/** |
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* The stream class |
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* |
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* @see http://www.php-fig.org/psr/psr-7/ |
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* @since 1.0.0 |
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*/ |
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class Stream implements StreamInterface |
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{ |
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/** @var resource The resource. */ |
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private $resource; |
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/** @var array The metadata. */ |
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private $metadata; |
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/** @var string[] The read modes. */ |
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private static $readModes = ['r', 'w+', 'r+', 'x+', 'c+', 'rb', 'w+b', 'r+b', 'x+b', 'c+b', 'rt', 'w+t', 'r+t', 'x+t', 'c+t', 'a+']; |
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/** @var string[] The write modes. */ |
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private static $writeModes = ['w', 'w+', 'rw', 'r+', 'x+', 'c+', 'wb', 'w+b', 'r+b', 'x+b', 'c+b', 'w+t', 'r+t', 'x+t', 'c+t', 'a', 'a+']; |
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/** |
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* Construct a Stream object with the given resource. |
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* |
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* @param resource $resource |
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*/ |
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public function __construct($resource) |
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{ |
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if (!is_resource($resource)) { |
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throw new \InvalidArgumentException('Invalid resource'); |
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} |
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$this->resource = $resource; |
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$this->metadata = stream_get_meta_data($resource); |
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} |
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/** |
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* Destruct the Stream object. |
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*/ |
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public function __destruct() |
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{ |
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$this->close(); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function __toString() |
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{ |
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try { |
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$this->seek(0); |
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return $this->getContents(); |
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} catch (\Exception $e) { |
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return ''; |
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} |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function close() |
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{ |
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if (isset($this->resource)) { |
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if (is_resource($this->resource)) { |
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fclose($this->resource); |
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} |
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$this->detach(); |
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} |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function detach() |
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{ |
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if (!isset($this->resource)) { |
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return null; |
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} |
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$result = $this->resource; |
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unset($this->resource); |
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return $result; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function getSize() |
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{ |
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if (!isset($this->resource)) { |
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return null; |
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} |
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if ($this->getMetadata('uri')) { |
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clearstatcache(true, $this->getMetadata('uri')); |
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} |
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$stats = fstat($this->resource); |
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return isset($stats['size']) ? $stats['size'] : null; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function tell() |
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{ |
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try { |
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$result = ftell($this->resource); |
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} catch (\TypeError $e) { |
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throw new \RuntimeException('Error while getting the position of the pointer', 0, $e); |
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} |
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if ($result === false) { |
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throw new \RuntimeException('Error while getting the position of the pointer'); |
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} |
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return $result; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function eof() |
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{ |
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return isset($this->resource) && feof($this->resource); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function isSeekable() |
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{ |
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return isset($this->resource) && $this->getMetadata('seekable'); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function seek($offset, $whence = SEEK_SET) |
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{ |
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if (!$this->isSeekable()) { |
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throw new \RuntimeException('Stream is not seekable'); |
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} |
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try { |
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$result = fseek($this->resource, $offset, $whence); |
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} catch (\TypeError $e) { |
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throw new \RuntimeException('Error while seeking the stream', 0, $e); |
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} |
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if ($result === false) { |
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throw new \RuntimeException('Error while seeking the stream'); |
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} |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function rewind() |
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{ |
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$this->seek(0); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function isWritable() |
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{ |
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return isset($this->resource) && in_array($this->getMetadata('mode'), self::$writeModes); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function write($string) |
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{ |
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if (!$this->isWritable()) { |
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throw new \RuntimeException('Stream is not writable'); |
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} |
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try { |
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$result = fwrite($this->resource, $string); |
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} catch (\TypeError $e) { |
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throw new \RuntimeException('Error while writing the stream', 0, $e); |
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} |
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if ($result === false) { |
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throw new \RuntimeException('Error while writing the stream'); |
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} |
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return $result; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function isReadable() |
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{ |
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return isset($this->resource) && in_array($this->getMetadata('mode'), self::$readModes); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function read($length) |
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{ |
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if (!$this->isReadable()) { |
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throw new \RuntimeException('Stream is not readable'); |
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} |
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try { |
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$result = stream_get_contents($this->resource, $length); |
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} catch (\TypeError $e) { |
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throw new \RuntimeException('Error while reading the stream', 0, $e); |
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} |
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if ($result === false) { |
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throw new \RuntimeException('Error while reading the stream'); |
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} |
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return $result; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function getContents() |
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{ |
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return $this->read(-1); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function getMetadata($key = null) |
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{ |
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if ($key === null) { |
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return $this->metadata; |
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} |
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return isset($this->metadata[$key]) ? $this->metadata[$key] : null; |
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} |
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} |
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