/*
* 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.analysis;
import org.apache.lucene.analysis.TokenStream;
import org.apache.lucene.analysis.minhash.MinHashFilterFactory;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.env.Environment;
import org.elasticsearch.index.IndexSettings;
import java.util.HashMap;
import java.util.Map;
/**
* TokenFilterFactoryAdapter for {@link MinHashFilterFactory}
*
*/
public class MinHashTokenFilterFactory extends AbstractTokenFilterFactory {
private final MinHashFilterFactory minHashFilterFactory;
public MinHashTokenFilterFactory(IndexSettings indexSettings, Environment environment, String name, Settings settings) {
super(indexSettings, name, settings);
minHashFilterFactory = new MinHashFilterFactory(convertSettings(settings));
}
@Override
public TokenStream create(TokenStream tokenStream) {
return minHashFilterFactory.create(tokenStream);
}
private Map<String, String> convertSettings(Settings settings) {
Map<String, String> settingMap = new HashMap<>();
settingMap.put("hashCount", settings.get("hash_count"));
settingMap.put("bucketCount", settings.get("bucket_count"));
settingMap.put("hashSetSize", settings.get("hash_set_size"));
settingMap.put("withRotation", settings.get("with_rotation"));
return settingMap;
}
}