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/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch licenses this file to you under
* the Apache License, Version 2.0 (the "License"); you may
* not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.elasticsearch.index.similarity;
import org.apache.lucene.search.similarities.LMJelinekMercerSimilarity;
import org.apache.lucene.search.similarities.Similarity;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.inject.assistedinject.Assisted;
import org.elasticsearch.common.settings.Settings;
/**
* {@link SimilarityProvider} for {@link LMJelinekMercerSimilarity}.
* <p>
* Configuration options available:
* <ul>
* <li>lambda</li>
* </ul>
* @see LMJelinekMercerSimilarity For more information about configuration
*/
public class LMJelinekMercerSimilarityProvider extends AbstractSimilarityProvider {
private final LMJelinekMercerSimilarity similarity;
public LMJelinekMercerSimilarityProvider(String name, Settings settings) {
super(name);
float lambda = settings.getAsFloat("lambda", 0.1f);
this.similarity = new LMJelinekMercerSimilarity(lambda);
}
/**
* {@inheritDoc}
*/
@Override
public Similarity get() {
return similarity;
}
}
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