1 /* 2 * Copyright 2007 Google Inc. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.tonicsystems.jarjar; 18 19 import static java.nio.charset.StandardCharsets.UTF_8; 20 21 import com.android.jarjar.StripAnnotation; 22 import java.io.BufferedReader; 23 import java.io.File; 24 import java.io.IOException; 25 import java.io.Reader; 26 import java.nio.file.Files; 27 import java.util.ArrayList; 28 import java.util.Arrays; 29 import java.util.List; 30 31 class RulesFileParser { RulesFileParser()32 private RulesFileParser() {} 33 parse(File file)34 public static List<PatternElement> parse(File file) throws IOException { 35 return parse(Files.newBufferedReader(file.toPath(), UTF_8)); 36 } 37 parse(String value)38 public static List<PatternElement> parse(String value) throws IOException { 39 return parse(new java.io.StringReader(value)); 40 } 41 parse(Reader r)42 private static List<PatternElement> parse(Reader r) throws IOException { 43 try { 44 List<PatternElement> patterns = new ArrayList<>(); 45 BufferedReader br = new BufferedReader(r); 46 int c = 1; 47 String line; 48 while ((line = br.readLine()) != null) { 49 line = stripComment(line); 50 if (line.isEmpty()) { 51 continue; 52 } 53 String[] parts = line.split("\\s+"); 54 if (parts.length < 2) { 55 error(c, parts); 56 } 57 String type = parts[0]; 58 PatternElement element = null; 59 switch (type) { 60 case "rule": 61 if (parts.length < 3) { 62 error(c, parts); 63 } 64 Rule rule = new Rule(); 65 rule.setResult(parts[2]); 66 element = rule; 67 break; 68 case "zap": 69 element = new Zap(); 70 break; 71 case "keep": 72 element = new Keep(); 73 break; 74 // ANDROID-BEGIN: b/222743634 Strip annotations from system module stubs 75 case "strip-annotation": 76 element = new StripAnnotation(); 77 break; 78 // ANDROID-END: b/222743634 Strip annotations from system module stubs 79 default: 80 error(c, parts); 81 } 82 element.setPattern(parts[1]); 83 patterns.add(element); 84 c++; 85 } 86 return patterns; 87 } finally { 88 r.close(); 89 } 90 } 91 stripComment(String in)92 private static String stripComment(String in) { 93 int p = in.indexOf("#"); 94 return p < 0 ? in : in.substring(0, p); 95 } 96 error(int line, String[] parts)97 private static void error(int line, String[] parts) { 98 throw new IllegalArgumentException("Error on line " + line + ": " + Arrays.asList(parts)); 99 } 100 } 101