Never mind. The sorting was working correctly. I was just misinterpretting
the results I was seeing.
-Theo
Theodan wrote:
>
> Hello.
>
> I am trying to sort my query results on a String field called "AssetType"
> and then on the relevancy score, but I need a particular ordering of the
> possible values in "AssetType" (i.e. first "Video", then "Article", etc.).
>
> I have tried doing this with a custom SortComparator that returns Integers
> from getComparable(), as follows:
>
> ===========================
>
> public class LuceneIndexSearchCommand extends AbstractSearchCommand {
>
> protected boolean execute(SearchContext context) throws Exception {
>
> ...
>
> Hits hits = new Hits();
>
> ...
>
> BooleanQuery keywordQuery = new BooleanQuery();
>
> ...
>
> Query query = queryParser.parse(finalQuery);
>
> ConstantScoreRangeQuery constantScoreRangeQuery = new
> ConstantScoreRangeQuery("assettype", null, null, true, true);
>
> BooleanQuery booleanQuery = new BooleanQuery();
> booleanQuery.add(query, Occur.MUST);
> booleanQuery.add(constantScoreRangeQuery, Occur.MUST);
>
> SortField[] sortFields = new SortField[] {
> new SortField("assettype", new
> AssetTypeSortComparator()),
> SortField.FIELD_SCORE
> };
> hits.recordHits(searcher.search(booleanQuery, new
> Sort(sortFields)));
>
> ...
>
> }
>
> private static class AssetTypeSortComparator extends SortComparator {
>
> private static final Map ASSET_TYPE_ORDER_MAP = new HashMap();
> private static final Integer DEFAULT_ORDER = new Integer(3);
>
> static {
> ASSET_TYPE_ORDER_MAP.put("Interactive".toLowerCase(),
> new Integer(0));
> ASSET_TYPE_ORDER_MAP.put("Video".toLowerCase(), new
> Integer(0));
>
> ASSET_TYPE_ORDER_MAP.put("EncyclopediaArticles".toLowerCase(), new
> Integer(1));
> ASSET_TYPE_ORDER_MAP.put("Image".toLowerCase(), new
> Integer(2));
> }
>
> protected Comparable getComparable(String termtext) {
> if
> (ASSET_TYPE_ORDER_MAP.containsKey(termtext.toLowerCase())) {
> return
> (Integer)ASSET_TYPE_ORDER_MAP.get(termtext.toLowerCase());
> }
> else {
> return DEFAULT_ORDER;
> }
> }
>
> };
>
> }
>
> ===========================
>
> but my Hits don't come back sorted. They seem to be in the same unsorted
> order as before I started trying to use the custom SortComparator.
>
> I have debugged through SortComparator and FieldCacheImpl, and the
> "cachedValues" array does seem to correctly contain Integer items
> corresponding to most of my 80,000+ docs. The rest of the items in the
> array are null, corresponding to those docs that are missing a value for
> the "AssetType" field.
>
> Also, FYI, I am using ConstantScoreRangeQuery because the "AssetType"
> field is sometimes missing from certain of the docs, and if I don't use
> ConstantScoreRangeQuery then I get NullPointerException on
> SortComparator.java:37, as has been discussed before on this mailing list.
>
> Any help would be greatly appreciated.
>
> -Theo
>
--
View this message in context:
http://www.nabble.com/Sorting-with-custom-SortComparator-tf3648692.html#a10224767
Sent from the Lucene - Java Users mailing list archive at Nabble.com.
---------------------------------------------------------------------
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
