org.opensearch.index.similarity.ScriptedSimilarityProvider Maven / Gradle / Ivy
/*
* SPDX-License-Identifier: Apache-2.0
*
* The OpenSearch Contributors require contributions made to
* this file be licensed under the Apache-2.0 license or a
* compatible open source license.
*/
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* Licensed to Elasticsearch under one or more contributor
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* 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
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* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
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/*
* Modifications Copyright OpenSearch Contributors. See
* GitHub history for details.
*/
package org.opensearch.index.similarity;
import org.apache.lucene.search.similarities.Similarity;
import org.opensearch.Version;
import org.opensearch.common.TriFunction;
import org.opensearch.common.settings.Settings;
import org.opensearch.script.Script;
import org.opensearch.script.ScriptService;
import org.opensearch.script.SimilarityScript;
import org.opensearch.script.SimilarityWeightScript;
/** Provider of scripted similarities. */
final class ScriptedSimilarityProvider implements TriFunction {
@Override
public Similarity apply(Settings settings, Version indexCreatedVersion, ScriptService scriptService) {
boolean discountOverlaps = settings.getAsBoolean(SimilarityProviders.DISCOUNT_OVERLAPS, true);
Settings scriptSettings = settings.getAsSettings("script");
Script script = Script.parse(scriptSettings);
SimilarityScript.Factory scriptFactory = scriptService.compile(script, SimilarityScript.CONTEXT);
Settings weightScriptSettings = settings.getAsSettings("weight_script");
Script weightScript = null;
SimilarityWeightScript.Factory weightScriptFactory = null;
if (weightScriptSettings.isEmpty() == false) {
weightScript = Script.parse(weightScriptSettings);
weightScriptFactory = scriptService.compile(weightScript, SimilarityWeightScript.CONTEXT);
}
return new ScriptedSimilarity(
weightScript == null ? null : weightScript.toString(),
weightScriptFactory == null ? null : weightScriptFactory::newInstance,
script.toString(),
scriptFactory::newInstance,
discountOverlaps
);
}
}