| /* |
| * 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. |
| */ |
| |
| package org.apache.hugegraph.analyzer; |
| |
| import java.io.Reader; |
| import java.io.StringReader; |
| import java.util.Set; |
| |
| import org.apache.hugegraph.HugeException; |
| import org.apache.hugegraph.util.InsertionOrderUtil; |
| import org.apache.lucene.analysis.TokenStream; |
| import org.apache.lucene.analysis.cn.smart.SmartChineseAnalyzer; |
| import org.apache.lucene.analysis.tokenattributes.CharTermAttribute; |
| |
| /** |
| * Reference from https://lucene.apache.org/core/8_11_2/analyzers-smartcn/index.html |
| */ |
| public class SmartCNAnalyzer implements Analyzer { |
| |
| private static final SmartChineseAnalyzer ANALYZER = |
| new SmartChineseAnalyzer(); |
| |
| public SmartCNAnalyzer(String mode) { |
| // pass |
| } |
| |
| @Override |
| public Set<String> segment(String text) { |
| Set<String> result = InsertionOrderUtil.newSet(); |
| Reader reader = new StringReader(text); |
| try (TokenStream tokenStream = ANALYZER.tokenStream("text", reader)) { |
| tokenStream.reset(); |
| CharTermAttribute term; |
| while (tokenStream.incrementToken()) { |
| term = tokenStream.getAttribute(CharTermAttribute.class); |
| result.add(term.toString()); |
| } |
| } catch (Exception e) { |
| throw new HugeException("SmartCN segment text '%s' failed", |
| e, text); |
| } |
| return result; |
| } |
| } |