/*
* 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.query;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.TokenFilter;
import org.apache.lucene.analysis.TokenStream;
import org.apache.lucene.analysis.Tokenizer;
import org.apache.lucene.analysis.standard.StandardTokenizer;
import org.apache.lucene.analysis.tokenattributes.CharTermAttribute;
import org.apache.lucene.analysis.tokenattributes.PositionIncrementAttribute;
import java.io.IOException;
public class MockRepeatAnalyzer extends Analyzer {
private static class MockRepeatFilter extends TokenFilter {
CharTermAttribute termAtt = addAttribute(CharTermAttribute.class);
PositionIncrementAttribute posIncAtt = addAttribute(PositionIncrementAttribute.class);
String repeat;
MockRepeatFilter(TokenStream input) {
super(input);
}
@Override
public final boolean incrementToken() throws IOException {
if (repeat != null) {
// add repeat token
clearAttributes();
termAtt.setEmpty().append(repeat);
posIncAtt.setPositionIncrement(0);
repeat = null;
return true;
}
if (input.incrementToken()) {
repeat = termAtt.toString();
return true;
} else {
return false;
}
}
}
@Override
protected TokenStreamComponents createComponents(String fieldName) {
Tokenizer tokenizer = new StandardTokenizer();
TokenStream repeatFilter = new MockRepeatFilter(tokenizer);
return new TokenStreamComponents(tokenizer, repeatFilter);
}
}