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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.analysis;
import org.apache.lucene.analysis.TokenStream;
import org.apache.lucene.analysis.miscellaneous.LengthFilter;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.env.Environment;
import org.elasticsearch.index.IndexSettings;
public class LengthTokenFilterFactory extends AbstractTokenFilterFactory {
private final int min;
private final int max;
// ancient unsupported option
private static final String ENABLE_POS_INC_KEY = "enable_position_increments";
public LengthTokenFilterFactory(IndexSettings indexSettings, Environment environment, String name, Settings settings) {
super(indexSettings, name, settings);
min = settings.getAsInt("min", 0);
max = settings.getAsInt("max", Integer.MAX_VALUE);
if (settings.get(ENABLE_POS_INC_KEY) != null) {
throw new IllegalArgumentException(ENABLE_POS_INC_KEY + " is not supported anymore. Please fix your analysis chain");
}
}
@Override
public TokenStream create(TokenStream tokenStream) {
return new LengthFilter(tokenStream, min, max);
}
}