| package org.apache.rya.indexing.accumulo.freetext; |
| |
| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF 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. |
| */ |
| |
| |
| |
| import java.io.IOException; |
| import java.io.StringReader; |
| import java.util.SortedSet; |
| import java.util.TreeSet; |
| |
| import org.apache.lucene.analysis.Analyzer; |
| import org.apache.lucene.analysis.TokenStream; |
| import org.apache.lucene.analysis.standard.StandardAnalyzer; |
| import org.apache.lucene.analysis.tokenattributes.CharTermAttribute; |
| import org.apache.lucene.util.Version; |
| |
| /** |
| * A {@link Tokenizer} that delegates to Lucene functions |
| */ |
| public class LuceneTokenizer implements Tokenizer { |
| private static final Analyzer analyzer = new StandardAnalyzer(Version.LUCENE_36); |
| |
| @Override |
| public SortedSet<String> tokenize(String string) { |
| SortedSet<String> set = new TreeSet<String>(); |
| try { |
| TokenStream stream = analyzer.tokenStream(null, new StringReader(string)); |
| stream.reset(); |
| while (stream.incrementToken()) { |
| set.add(stream.getAttribute(CharTermAttribute.class).toString()); |
| } |
| } catch (IOException e) { |
| // not thrown b/c we're using a string reader... |
| throw new RuntimeException(e); |
| } |
| |
| return set; |
| } |
| } |