| /* |
| * Copyright (C) 2017 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.car.test.utils; |
| |
| import android.annotation.Nullable; |
| import android.os.SystemClock; |
| import java.io.File; |
| import java.io.IOException; |
| import java.nio.file.FileVisitResult; |
| import java.nio.file.Files; |
| import java.nio.file.Path; |
| import java.nio.file.SimpleFileVisitor; |
| import java.nio.file.attribute.BasicFileAttributes; |
| |
| /** |
| * A utility class that creates a temporary directory. |
| * The directory, and any files contained within, are automatically deleted when calling close(). |
| * |
| * Example usage: |
| * |
| * try (TemporaryDirectory tf = new TemporaryDirectory("myTest")) { |
| * ... |
| * } // directory gets deleted here |
| */ |
| public class TemporaryDirectory implements AutoCloseable { |
| private Path mDirectory; |
| |
| private static final class DeletingVisitor extends SimpleFileVisitor<Path> { |
| FileVisitResult consume(Path path) throws IOException { |
| Files.delete(path); |
| return FileVisitResult.CONTINUE; |
| } |
| |
| @Override |
| public FileVisitResult visitFile(Path path, BasicFileAttributes basicFileAttributes) |
| throws IOException { |
| return consume(path); |
| } |
| |
| @Override |
| public FileVisitResult postVisitDirectory(Path path, IOException e) |
| throws IOException { |
| return consume(path); |
| } |
| } |
| |
| private static final SimpleFileVisitor<Path> DELETE = new DeletingVisitor(); |
| |
| TemporaryDirectory(Path directory) throws IOException { |
| mDirectory = Files.createDirectory(directory); |
| } |
| |
| public TemporaryDirectory(@Nullable String prefix) throws IOException { |
| if (prefix == null) { |
| prefix = TemporaryDirectory.class.getSimpleName(); |
| } |
| prefix += String.valueOf(SystemClock.elapsedRealtimeNanos()); |
| |
| mDirectory = Files.createTempDirectory(prefix); |
| } |
| |
| @Override |
| public void close() throws Exception { |
| Files.walkFileTree(mDirectory, DELETE); |
| } |
| |
| public File getDirectory() { |
| return mDirectory.toFile(); |
| } |
| |
| public Path getPath() { return mDirectory; } |
| |
| public TemporaryDirectory getSubdirectory(String name) throws IOException { |
| return new TemporaryDirectory(mDirectory.resolve(name)); |
| } |
| } |