final MediaType mediaTypeFromFilename = mimeTypes.detect(null, metadata);
                return mediaTypeFromFilename.getType() + "/" + mediaTypeFromFilename.getSubtype();
            }
            return mediaType.getType() + "/" + mediaType.getSubtype();
        } catch (final IOException e) {
            throw new MimeTypeException("Could not detect a content type.", e);
        }
    }

        return sitemapList.toArray(new Sitemap[sitemapList.size()]);
    }

    /**
     * Sets the type of this sitemap set.
     * @param type the type to set (URLSET or INDEX)
     */
    public void setType(final String type) {
        this.type = type;
    }

    /**
     * Checks if this sitemap set is of type URLSET.
     * @return true if this is a URLSET, false otherwise
     */
    public boolean isUrlSet() {