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/*
* Copyright (C) 2025 The Android Open Source Project
*
* Licensed 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 com.android.dependencymapper;
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* An utility class that reads each java file present in the rsp content then analyzes the same,
* collecting the analysis in {@link List<JavaSourceData>}
*/
public class JavaSourceAnalyzer {
// Regex that matches against "package abc.xyz.lmn;" declarations in a java file.
private static final String PACKAGE_REGEX = "^package\\s+([a-zA-Z_][a-zA-Z0-9_.]*);";
public static List<JavaSourceData> analyze(Path srcRspFile) {
List<JavaSourceData> javaSourceDataList = new ArrayList<>();
try (BufferedReader reader = new BufferedReader(new FileReader(srcRspFile.toFile()))) {
String line;
while ((line = reader.readLine()) != null) {
// Split the line by spaces, tabs, multiple java files can be on a single line.
String[] files = line.trim().split("\\s+");
for (String file : files) {
Path p = Paths.get("", file);
System.out.println(p.toAbsolutePath().toString());
javaSourceDataList
.add(new JavaSourceData(file, constructPackagePrependedFileName(file)));
}
}
} catch (IOException e) {
System.err.println("Error reading rsp file at: " + srcRspFile);
throw new RuntimeException(e);
}
return javaSourceDataList;
}
private static String constructPackagePrependedFileName(String filePath) {
String packageAppendedFileName = null;
// if the file path is abc/def/ghi/JavaFile.java we extract JavaFile.java
String javaFileName = filePath.substring(filePath.lastIndexOf("/") + 1);
try (BufferedReader reader = new BufferedReader(new FileReader(filePath))) {
String line;
// Process each line and match against the package regex pattern.
while ((line = reader.readLine()) != null) {
Pattern pattern = Pattern.compile(PACKAGE_REGEX);
Matcher matcher = pattern.matcher(line);
if (matcher.find()) {
packageAppendedFileName = matcher.group(1) + "." + javaFileName;
break;
}
}
} catch (IOException e) {
System.err.println("Error reading java file at: " + filePath);
throw new RuntimeException(e);
}
// Should not be null
assert packageAppendedFileName != null;
return packageAppendedFileName;
}
}
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