1 /* 2 * Copyright (C) 2025 The Android Open Source Project 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 package com.android.dependencymapper; 17 18 import java.io.BufferedReader; 19 import java.io.FileReader; 20 import java.io.IOException; 21 import java.nio.file.Path; 22 import java.nio.file.Paths; 23 import java.util.ArrayList; 24 import java.util.List; 25 import java.util.regex.Matcher; 26 import java.util.regex.Pattern; 27 28 /** 29 * An utility class that reads each java file present in the rsp content then analyzes the same, 30 * collecting the analysis in {@link List<JavaSourceData>} 31 */ 32 public class JavaSourceAnalyzer { 33 34 // Regex that matches against "package abc.xyz.lmn;" declarations in a java file. 35 private static final String PACKAGE_REGEX = "^package\\s+([a-zA-Z_][a-zA-Z0-9_.]*);"; 36 analyze(Path srcRspFile)37 public static List<JavaSourceData> analyze(Path srcRspFile) { 38 List<JavaSourceData> javaSourceDataList = new ArrayList<>(); 39 try (BufferedReader reader = new BufferedReader(new FileReader(srcRspFile.toFile()))) { 40 String line; 41 while ((line = reader.readLine()) != null) { 42 // Split the line by spaces, tabs, multiple java files can be on a single line. 43 String[] files = line.trim().split("\\s+"); 44 for (String file : files) { 45 Path p = Paths.get("", file); 46 System.out.println(p.toAbsolutePath().toString()); 47 javaSourceDataList 48 .add(new JavaSourceData(file, constructPackagePrependedFileName(file))); 49 } 50 } 51 } catch (IOException e) { 52 System.err.println("Error reading rsp file at: " + srcRspFile); 53 throw new RuntimeException(e); 54 } 55 return javaSourceDataList; 56 } 57 constructPackagePrependedFileName(String filePath)58 private static String constructPackagePrependedFileName(String filePath) { 59 String packageAppendedFileName = null; 60 // if the file path is abc/def/ghi/JavaFile.java we extract JavaFile.java 61 String javaFileName = filePath.substring(filePath.lastIndexOf("/") + 1); 62 try (BufferedReader reader = new BufferedReader(new FileReader(filePath))) { 63 String line; 64 // Process each line and match against the package regex pattern. 65 while ((line = reader.readLine()) != null) { 66 Pattern pattern = Pattern.compile(PACKAGE_REGEX); 67 Matcher matcher = pattern.matcher(line); 68 if (matcher.find()) { 69 packageAppendedFileName = matcher.group(1) + "." + javaFileName; 70 break; 71 } 72 } 73 } catch (IOException e) { 74 System.err.println("Error reading java file at: " + filePath); 75 throw new RuntimeException(e); 76 } 77 // Should not be null 78 assert packageAppendedFileName != null; 79 return packageAppendedFileName; 80 } 81 } 82