55 lines
1.8 KiB
Java
55 lines
1.8 KiB
Java
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/*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package it.cavallium.dbengine.lucene.similarity;
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import org.apache.lucene.search.similarities.ClassicSimilarity;
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import org.apache.lucene.search.similarities.Similarity;
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import org.novasearch.lucene.search.similarities.BM25Similarity;
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import org.novasearch.lucene.search.similarities.BM25Similarity.BM25Model;
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public class NGramSimilarity {
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private NGramSimilarity() {
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}
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public static Similarity classic() {
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var instance = new ClassicSimilarity();
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instance.setDiscountOverlaps(false);
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return instance;
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}
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public static Similarity bm25(BM25Model model) {
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var instance = new BM25Similarity(model);
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instance.setDiscountOverlaps(false);
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return instance;
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}
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public static Similarity bm15(BM25Model model) {
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var instance = new BM25Similarity(1.2f, 0.0f, 0.5f, model);
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instance.setDiscountOverlaps(false);
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return instance;
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}
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public static Similarity bm11(BM25Model model) {
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var instance = new BM25Similarity(1.2f, 1.0f, 0.5f, model);
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instance.setDiscountOverlaps(false);
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return instance;
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}
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}
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