| /* |
| * 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.sysds.runtime.lineage; |
| |
| import org.apache.sysds.parser.ParseException; |
| |
| import java.util.ArrayList; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.regex.Matcher; |
| import java.util.regex.Pattern; |
| |
| |
| public class LineageTokenizer { |
| |
| private final List<TokenInfo> _tokenInfos; |
| |
| public LineageTokenizer() { |
| _tokenInfos = new ArrayList<>(); |
| } |
| |
| public void add(String regex, String key) { |
| _tokenInfos.add(new TokenInfo(Pattern.compile("^(" + regex + ")"), key)); |
| } |
| |
| public void add(String regex) { |
| _tokenInfos.add(new TokenInfo(Pattern.compile("^(" + regex + ")"), "")); |
| } |
| |
| public Map<String, String> tokenize(String str) { |
| Map<String, String> tokens = new HashMap<>(); |
| |
| for (TokenInfo info : _tokenInfos) { |
| Matcher m = info.regex.matcher(str); |
| if (m.find()) { |
| String tok = m.group().trim(); |
| if (!info.key.isEmpty()) |
| tokens.put(info.key, tok); |
| str = m.replaceFirst(""); |
| } |
| } |
| if (!str.isEmpty()) |
| throw new ParseException("Unexpected character in input: " + str); |
| return tokens; |
| } |
| |
| private class TokenInfo { |
| public final Pattern regex; |
| public final String key; |
| |
| public TokenInfo(Pattern regex, String key) { |
| super(); |
| this.regex = regex; |
| this.key = key; |
| } |
| } |
| } |