Java FileStore ensureExists(Path folder)

Description

ensure Exists

License

Open Source License

Declaration

public static Path ensureExists(Path folder) throws IOException 

Method Source Code

//package com.java2s;
/*/*from w  ww . j  av a2  s  .c o m*/
 * Copyright (C) 2016 Cosmin Cara
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU 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 General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along
 *  with this program; if not, see http://www.gnu.org/licenses/
 */

import java.io.IOException;
import java.nio.file.*;
import java.nio.file.attribute.FileAttribute;
import java.nio.file.attribute.PosixFileAttributeView;
import java.nio.file.attribute.PosixFilePermission;
import java.nio.file.attribute.PosixFilePermissions;

import java.util.Set;

public class Main {
    private static Boolean supportsPosix;

    public static Path ensureExists(Path folder) throws IOException {
        if (folder != null && !Files.exists(folder)) {
            if (isPosixFileSystem()) {
                Set<PosixFilePermission> perms = PosixFilePermissions
                        .fromString("rwxr-xr-x");
                FileAttribute<Set<PosixFilePermission>> attrs = PosixFilePermissions
                        .asFileAttribute(perms);
                folder = Files.createDirectory(folder, attrs);
            } else {
                folder = Files.createDirectory(folder);
            }

        }
        return folder;
    }

    private static boolean isPosixFileSystem() {
        if (supportsPosix == null) {
            supportsPosix = Boolean.FALSE;
            FileSystem fileSystem = FileSystems.getDefault();
            Iterable<FileStore> fileStores = fileSystem.getFileStores();
            for (FileStore fs : fileStores) {
                supportsPosix = fs
                        .supportsFileAttributeView(PosixFileAttributeView.class);
                if (supportsPosix) {
                    break;
                }
            }
        }
        return supportsPosix;
    }
}

Related

1. canExecuteExecutable(File file)
2. createTempFileWithAttributes(Path tempFilePath, File fileName)
3. diskFree()
4. findTopResourceInVolume(FileStore fstore, Path path)
5. getAclAttributes(Path file)
6. getFileStore(Path path)
7. getFileStore(URI uri)