46 lines
2.1 KiB
Java
46 lines
2.1 KiB
Java
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package it.cavallium.dbengine.lucene.searcher;
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import static it.cavallium.dbengine.lucene.searcher.PaginationInfo.FIRST_PAGE_LIMIT;
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import static it.cavallium.dbengine.lucene.searcher.PaginationInfo.MAX_SINGLE_SEARCH_LIMIT;
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import it.cavallium.dbengine.client.query.QueryParser;
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import it.cavallium.dbengine.client.query.current.data.QueryParams;
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import it.cavallium.dbengine.lucene.LuceneUtils;
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import java.util.Objects;
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import org.apache.lucene.search.Query;
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import org.apache.lucene.search.ScoreMode;
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import org.apache.lucene.search.Sort;
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import reactor.core.publisher.Mono;
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public class UnscoredLuceneMultiSearcher implements LuceneMultiSearcher {
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@Override
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public Mono<LuceneShardSearcher> createShardSearcher(QueryParams queryParams) {
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return Mono
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.fromCallable(() -> {
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Objects.requireNonNull(queryParams.scoreMode(), "ScoreMode must not be null");
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Query luceneQuery = QueryParser.toQuery(queryParams.query());
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Sort luceneSort = QueryParser.toSort(queryParams.sort());
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ScoreMode luceneScoreMode = QueryParser.toScoreMode(queryParams.scoreMode());
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if (luceneScoreMode.needsScores()) {
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throw new UnsupportedOperationException("Can't use the unscored searcher to do a scored query");
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}
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if (luceneSort != null && luceneSort != Sort.RELEVANCE) {
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throw new UnsupportedOperationException("Can't use the unscored searcher to do a sorted query");
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}
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PaginationInfo paginationInfo;
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if (queryParams.limit() <= MAX_SINGLE_SEARCH_LIMIT) {
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paginationInfo = new PaginationInfo(queryParams.limit(), queryParams.offset(), queryParams.limit(), true);
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} else {
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paginationInfo = new PaginationInfo(queryParams.limit(), queryParams.offset(), FIRST_PAGE_LIMIT, true);
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}
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UnsortedCollectorManager unsortedCollectorManager = new UnsortedCollectorManager(() -> TopDocsSearcher.getTopDocsCollector(null,
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LuceneUtils.safeLongToInt(paginationInfo.firstPageOffset() + paginationInfo.firstPageLimit()),
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null,
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1000
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), queryParams.offset(), queryParams.limit());
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return new UnscoredLuceneShardSearcher(unsortedCollectorManager, luceneQuery, paginationInfo);
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});
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}
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}
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