interface FileInterface

interface FileInterface extends ContentEntityInterface, EntityChangedInterface, EntityOwnerInterface {
    
    /**
     * Indicates that the file is permanent and should not be deleted.
     *
     * Temporary files older than the system.file.temporary_maximum_age will be
     * removed during cron runs if cleanup is not disabled. (Permanent files will
     * not be removed during the file garbage collection process.)
     */
    const STATUS_PERMANENT = 1;
    
    /**
     * Returns the name of the file.
     *
     * This may differ from the basename of the URI if the file is renamed to
     * avoid overwriting an existing file.
     *
     * @return string|null
     *   Name of the file, or NULL if unknown.
     */
    public function getFilename();
    
    /**
     * Sets the name of the file.
     *
     * @param string|null $filename
     *   The file name that corresponds to this file, or NULL if unknown. May
     *   differ from the basename of the URI and changing the filename does not
     *   change the URI.
     */
    public function setFilename($filename);
    
    /**
     * Returns the URI of the file.
     *
     * @return string|null
     *   The URI of the file, e.g. public://directory/file.jpg, or NULL if it has
     *   not yet been set.
     */
    public function getFileUri();
    
    /**
     * Sets the URI of the file.
     *
     * @param string $uri
     *   The URI of the file, e.g. public://directory/file.jpg. Does not change
     *   the location of the file.
     */
    public function setFileUri($uri);
    
    /**
     * Creates a file URL for the URI of this file.
     *
     * @param bool $relative
     *   (optional) Whether the URL should be root-relative, defaults to TRUE.
     *
     * @return string
     *   A string containing a URL that may be used to access the file.
     *
     * @see \Drupal\Core\File\FileUrlGeneratorInterface
     */
    public function createFileUrl($relative = TRUE);
    
    /**
     * Returns the MIME type of the file.
     *
     * @return string|null
     *   The MIME type of the file, e.g. image/jpeg or text/xml, or NULL if it
     *   could not be determined.
     */
    public function getMimeType();
    
    /**
     * Sets the MIME type of the file.
     *
     * @param string|null $mime
     *   The MIME type of the file, e.g. image/jpeg or text/xml, or NULL if it
     *   could not be determined.
     */
    public function setMimeType($mime);
    
    /**
     * Returns the size of the file.
     *
     * @return int|null
     *   The size of the file in bytes, or NULL if it could not be determined.
     */
    public function getSize();
    
    /**
     * Sets the size of the file.
     *
     * @param int|null $size
     *   The size of the file in bytes, or NULL if it could not be determined.
     */
    public function setSize($size);
    
    /**
     * Returns TRUE if the file is permanent.
     *
     * @return bool
     *   TRUE if the file status is permanent.
     */
    public function isPermanent();
    
    /**
     * Returns TRUE if the file is temporary.
     *
     * @return bool
     *   TRUE if the file status is temporary.
     */
    public function isTemporary();
    
    /**
     * Sets the file status to permanent.
     */
    public function setPermanent();
    
    /**
     * Sets the file status to temporary.
     */
    public function setTemporary();
    
    /**
     * Returns the file entity creation timestamp.
     *
     * @return int|null
     *   Creation timestamp of the file entity, or NULL if unknown.
     */
    public function getCreatedTime();

}