needed, implementations may return an instance of CrawlDatum,
 with status <a href="../../../../../org/apache/nutch/crawl/CrawlDatum.html#STATUS_LINKED"><code>CrawlDatum.STATUS_LINKED</code></a>, which contains adjustments
 to be applied to the original CrawlDatum score(s) and metadata. This can
 be null if not needed.</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code><a href="../../../../../org/apache/nutch/scoring/ScoringFilterException.html" title="class in org.apache.nutch.scoring">ScoringFilt