org.sonar.api.utils.internal.DefaultTempFolder.java Source code

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Here is the source code for org.sonar.api.utils.internal.DefaultTempFolder.java

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/*
 * SonarQube
 * Copyright (C) 2009-2017 SonarSource SA
 * mailto:info AT sonarsource DOT com
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */
package org.sonar.api.utils.internal;

import java.nio.file.FileVisitResult;
import java.nio.file.SimpleFileVisitor;
import java.nio.file.attribute.BasicFileAttributes;
import org.apache.commons.io.FileUtils;
import org.sonar.api.utils.TempFolder;

import javax.annotation.Nullable;

import java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import org.sonar.api.utils.log.Logger;
import org.sonar.api.utils.log.Loggers;

public class DefaultTempFolder implements TempFolder {
    private static final Logger LOG = Loggers.get(DefaultTempFolder.class);

    private final File tempDir;
    private final boolean deleteOnExit;

    public DefaultTempFolder(File tempDir) {
        this(tempDir, false);
    }

    public DefaultTempFolder(File tempDir, boolean deleteOnExit) {
        this.tempDir = tempDir;
        this.deleteOnExit = deleteOnExit;
    }

    @Override
    public File newDir() {
        return createTempDir(tempDir.toPath()).toFile();
    }

    private static Path createTempDir(Path baseDir) {
        try {
            return Files.createTempDirectory(baseDir, null);
        } catch (IOException e) {
            throw new IllegalStateException("Failed to create temp directory", e);
        }
    }

    @Override
    public File newDir(String name) {
        File dir = new File(tempDir, name);
        try {
            FileUtils.forceMkdir(dir);
        } catch (IOException e) {
            throw new IllegalStateException("Failed to create temp directory - " + dir, e);
        }
        return dir;
    }

    @Override
    public File newFile() {
        return newFile(null, null);
    }

    @Override
    public File newFile(@Nullable String prefix, @Nullable String suffix) {
        return createTempFile(tempDir.toPath(), prefix, suffix).toFile();
    }

    private static Path createTempFile(Path baseDir, String prefix, String suffix) {
        try {
            return Files.createTempFile(baseDir, prefix, suffix);
        } catch (IOException e) {
            throw new IllegalStateException("Failed to create temp file", e);
        }
    }

    public void clean() {
        try {
            Files.walkFileTree(tempDir.toPath(), DeleteRecursivelyFileVisitor.INSTANCE);
        } catch (IOException e) {
            LOG.trace("Failed to delete temp folder", e);
        }
    }

    public void stop() {
        if (deleteOnExit) {
            clean();
        }
    }

    private static final class DeleteRecursivelyFileVisitor extends SimpleFileVisitor<Path> {
        public static final DeleteRecursivelyFileVisitor INSTANCE = new DeleteRecursivelyFileVisitor();

        @Override
        public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
            Files.delete(file);
            return FileVisitResult.CONTINUE;
        }

        @Override
        public FileVisitResult postVisitDirectory(Path dir, IOException exc) throws IOException {
            Files.delete(dir);
            return FileVisitResult.CONTINUE;
        }
    }

}