Java example source code file (UnixFileModeAttribute.java)

This example Java source code file (UnixFileModeAttribute.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

all_permissions, all_readwrite, fileattribute, group_write, nullpointerexception, others_read, owner_execute, owner_write, s_ixoth, string, suppresswarnings, unixconstants, unixfilemodeattribute, unsupportedoperationexception, util

The UnixFileModeAttribute.java Java example source code

/*
 * Copyright (c) 2008, 2009, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code 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
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package sun.nio.fs;

import java.nio.file.attribute.*;
import java.util.*;

class UnixFileModeAttribute {
    static final int ALL_PERMISSIONS =
        UnixConstants.S_IRUSR | UnixConstants.S_IWUSR | UnixConstants.S_IXUSR |
        UnixConstants.S_IRGRP | UnixConstants.S_IWGRP | UnixConstants.S_IXGRP |
        UnixConstants.S_IROTH | UnixConstants.S_IWOTH | UnixConstants. S_IXOTH;

    static final int ALL_READWRITE =
        UnixConstants.S_IRUSR | UnixConstants.S_IWUSR |
        UnixConstants.S_IRGRP | UnixConstants.S_IWGRP |
        UnixConstants.S_IROTH | UnixConstants.S_IWOTH;

    static final int TEMPFILE_PERMISSIONS =
        UnixConstants.S_IRUSR | UnixConstants.S_IWUSR | UnixConstants.S_IXUSR;

    private UnixFileModeAttribute() {
    }

    static int toUnixMode(Set<PosixFilePermission> perms) {
        int mode = 0;
        for (PosixFilePermission perm: perms) {
            if (perm == null)
                throw new NullPointerException();
            switch (perm) {
                case OWNER_READ :     mode |= UnixConstants.S_IRUSR; break;
                case OWNER_WRITE :    mode |= UnixConstants.S_IWUSR; break;
                case OWNER_EXECUTE :  mode |= UnixConstants.S_IXUSR; break;
                case GROUP_READ :     mode |= UnixConstants.S_IRGRP; break;
                case GROUP_WRITE :    mode |= UnixConstants.S_IWGRP; break;
                case GROUP_EXECUTE :  mode |= UnixConstants.S_IXGRP; break;
                case OTHERS_READ :    mode |= UnixConstants.S_IROTH; break;
                case OTHERS_WRITE :   mode |= UnixConstants.S_IWOTH; break;
                case OTHERS_EXECUTE : mode |= UnixConstants.S_IXOTH; break;
            }
        }
        return mode;
    }

    @SuppressWarnings("unchecked")
    static int toUnixMode(int defaultMode, FileAttribute<?>... attrs) {
        int mode = defaultMode;
        for (FileAttribute<?> attr: attrs) {
            String name = attr.name();
            if (!name.equals("posix:permissions") && !name.equals("unix:permissions")) {
                throw new UnsupportedOperationException("'" + attr.name() +
                   "' not supported as initial attribute");
            }
            mode = toUnixMode((Set<PosixFilePermission>)attr.value());
        }
        return mode;
    }
}