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<?php
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namespace Aws\S3\Exception;
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use Aws\CommandInterface;
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use Aws\Exception\AwsException;
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use Aws\Multipart\UploadState;
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class S3MultipartUploadException extends \Aws\Exception\MultipartUploadException
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{
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    /** @var string Bucket of the transfer object */
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    private $bucket;
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    /** @var string Key of the transfer object */
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    private $key;
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    /** @var string Source file name of the transfer object */
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    private $filename;
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    /**
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     * @param UploadState      $state Upload state at time of the exception.
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     * @param \Exception|array $prev  Exception being thrown. Could be an array of
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     *                                AwsExceptions being thrown when uploading parts
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     *                                for one object, or an instance of AwsException
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     *                                for a specific Multipart error being thrown in
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     *                                the MultipartUpload process.
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     */
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    public function __construct(UploadState $state, $prev = null) {
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        if (is_array($prev) && $error = $prev[key($prev)]) {
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            $this->collectPathInfo($error->getCommand());
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        } elseif ($prev instanceof AwsException) {
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            $this->collectPathInfo($prev->getCommand());
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        }
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        parent::__construct($state, $prev);
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    }
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    /**
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     * Get the Bucket information of the transfer object
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     *
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     * @return string|null Returns null when 'Bucket' information
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     *                     is unavailable.
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     */
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    public function getBucket()
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    {
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        return $this->bucket;
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    }
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    /**
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     * Get the Key information of the transfer object
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     *
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     * @return string|null Returns null when 'Key' information
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     *                     is unavailable.
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     */
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    public function getKey()
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    {
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        return $this->key;
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    }
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    /**
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     * Get the source file name of the transfer object
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     *
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     * @return string|null Returns null when metadata of the stream
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     *                     wrapped in 'Body' parameter is unavailable.
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     */
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    public function getSourceFileName()
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    {
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        return $this->filename;
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    }
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    /**
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     * Collect file path information when accessible. (Bucket, Key)
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     *
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     * @param CommandInterface $cmd
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     */
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    private function collectPathInfo(CommandInterface $cmd)
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    {
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        if (empty($this->bucket) && isset($cmd['Bucket'])) {
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            $this->bucket = $cmd['Bucket'];
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        }
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        if (empty($this->key) && isset($cmd['Key'])) {
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            $this->key = $cmd['Key'];
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        }
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        if (empty($this->filename) && isset($cmd['Body'])) {
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            $this->filename = $cmd['Body']->getMetadata('uri');
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        }
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    }
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}