Java FileStore createTempFileWithAttributes(Path tempFilePath, File fileName)

Description

create Temp File With Attributes

License

Open Source License

Declaration

static Path createTempFileWithAttributes(Path tempFilePath, File fileName) throws IOException 

Method Source Code

//package com.java2s;
/*/*from   w w w. j  a  va  2  s.c  om*/
* JBoss, Home of Professional Open Source.
* Copyright 2011, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This 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 2.1 of
* the License, or (at your option) any later version.
*
* This software 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 software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */

import java.io.File;
import java.io.IOException;

import java.nio.file.Files;
import java.nio.file.Path;

import java.nio.file.attribute.AclEntry;
import java.nio.file.attribute.AclFileAttributeView;
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.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Set;

public class Main {
    static Path createTempFileWithAttributes(Path tempFilePath, File fileName) throws IOException {
        Path exisitingFilePath = fileName.toPath();
        List<FileAttribute> attributes = new ArrayList<>(2);
        attributes.addAll(getPosixAttributes(exisitingFilePath));
        attributes.addAll(getAclAttributes(exisitingFilePath));
        if (!attributes.isEmpty()) {
            try {
                return Files.createFile(tempFilePath, attributes.toArray(new FileAttribute<?>[attributes.size()]));
            } catch (UnsupportedOperationException ex) {
            }
        }
        return Files.createFile(tempFilePath);
    }

    private static List<FileAttribute<Set<PosixFilePermission>>> getPosixAttributes(Path file) throws IOException {
        if (Files.exists(file)
                && Files.getFileStore(file).supportsFileAttributeView(PosixFileAttributeView.class)) {
            PosixFileAttributeView posixView = Files.getFileAttributeView(file, PosixFileAttributeView.class);
            if (posixView != null) {
                return Collections.singletonList(
                        PosixFilePermissions.asFileAttribute(posixView.readAttributes().permissions()));
            }
        }
        return Collections.emptyList();
    }

    private static List<FileAttribute<List<AclEntry>>> getAclAttributes(Path file) throws IOException {
        if (Files.exists(file) && Files.getFileStore(file).supportsFileAttributeView(AclFileAttributeView.class)) {
            AclFileAttributeView aclView = Files.getFileAttributeView(file, AclFileAttributeView.class);
            if (aclView != null) {
                final List<AclEntry> entries = aclView.getAcl();
                return Collections.singletonList(new FileAttribute<List<AclEntry>>() {

                    @Override
                    public List<AclEntry> value() {
                        return entries;
                    }

                    @Override
                    public String name() {
                        return "acl:acl";
                    }

                });
            }
        }
        return Collections.emptyList();
    }
}

Related

1. canExecuteExecutable(File file)
2. diskFree()
3. ensureExists(Path folder)
4. findTopResourceInVolume(FileStore fstore, Path path)
5. getAclAttributes(Path file)