44 lines
1.5 KiB
Java
44 lines
1.5 KiB
Java
package it.cavallium.dbengine.lucene.mlt;
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import com.google.common.collect.Multimap;
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import it.cavallium.dbengine.database.disk.LLIndexSearchers;
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import it.cavallium.dbengine.lucene.LuceneUtils;
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import it.cavallium.dbengine.lucene.searcher.GlobalQueryRewrite;
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import it.cavallium.dbengine.lucene.searcher.LocalQueryParams;
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import java.io.IOException;
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import org.apache.lucene.analysis.miscellaneous.PerFieldAnalyzerWrapper;
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import org.apache.lucene.search.similarities.Similarity;
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public class MoreLikeThisTransformer implements GlobalQueryRewrite {
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private final Multimap<String, String> mltDocumentFields;
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private final PerFieldAnalyzerWrapper luceneAnalyzer;
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private final Similarity luceneSimilarity;
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public MoreLikeThisTransformer(Multimap<String, String> mltDocumentFields,
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PerFieldAnalyzerWrapper luceneAnalyzer,
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Similarity luceneSimilarity) {
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this.mltDocumentFields = mltDocumentFields;
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this.luceneAnalyzer = luceneAnalyzer;
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this.luceneSimilarity = luceneSimilarity;
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}
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@Override
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public LocalQueryParams rewrite(LLIndexSearchers indexSearchers, LocalQueryParams queryParams) {
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var rewrittenQuery = LuceneUtils.getMoreLikeThisQuery(indexSearchers,
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queryParams,
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luceneAnalyzer,
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luceneSimilarity,
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mltDocumentFields
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);
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return new LocalQueryParams(rewrittenQuery,
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queryParams.offsetLong(),
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queryParams.limitLong(),
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queryParams.pageLimits(),
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queryParams.sort(),
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queryParams.computePreciseHitsCount(),
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queryParams.timeout()
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);
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}
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}
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