private static DocComparatorSource getComparatorSource(Browsable browser, SortField sf) {
DocComparatorSource compSource = null;
if (SortField.FIELD_DOC.equals(sf)) {
compSource = new DocIdDocComparatorSource();
} else if (SortField.FIELD_SCORE.equals(sf) || sf.getType() == SortField.SCORE) {
// we want to do reverse sorting regardless for relevance
compSource = new ReverseDocComparatorSource(new RelevanceDocComparatorSource());
} else if (sf instanceof BoboCustomSortField) {
BoboCustomSortField custField = (BoboCustomSortField) sf;
DocComparatorSource src = custField.getCustomComparatorSource();
assert src != null;
compSource = src;
} else {
Set<String> facetNames = browser.getFacetNames();
String sortName = sf.getField();
if (facetNames.contains(sortName)) {
FacetHandler<?> handler = browser.getFacetHandler(sortName);
assert handler != null;
compSource = handler.getDocComparatorSource();
} else { // default lucene field
logger.info("doing default lucene sort for: " + sf);
compSource = getNonFacetComparatorSource(sf);
}
}
boolean reverse = sf.getReverse();
if (reverse) {
compSource = new ReverseDocComparatorSource(compSource);
}
compSource.setReverse(reverse);
return compSource;
}
@Override
public DocComparator getComparator(IndexReader reader, int docbase) throws IOException {
return new ReverseDocComparator(_inner.getComparator(reader, docbase));
}
