/*

 * Copyright (c) 2008, 2012, 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.*;

import java.io.IOException;

import java.util.*;

import java.security.AccessController;

import sun.security.action.GetPropertyAction;

/**

 * Bsd implementation of FileSystem

 */

class BsdFileSystem extends UnixFileSystem {

    BsdFileSystem(UnixFileSystemProvider provider, String dir) {

        super(provider, dir);

    }

    @Override

    public WatchService newWatchService()

        throws IOException

    {

        // use polling implementation until we implement a BSD/kqueue one

        return new PollingWatchService();

    }

    // lazy initialization of the list of supported attribute views

    private static class SupportedFileFileAttributeViewsHolder {

        static final Set<String> supportedFileAttributeViews =

            supportedFileAttributeViews();

        private static Set<String> supportedFileAttributeViews() {

            Set<String> result = new HashSet<String>();

            result.addAll(standardFileAttributeViews());

            return Collections.unmodifiableSet(result);

        }

    }

    @Override

    public Set<String> supportedFileAttributeViews() {

        return SupportedFileFileAttributeViewsHolder.supportedFileAttributeViews;

    }

    @Override

    void copyNonPosixAttributes(int ofd, int nfd) {

    }

    /**

     * Returns object to iterate over mount entries

     */

    @Override

    Iterable<UnixMountEntry> getMountEntries() {

        ArrayList<UnixMountEntry> entries = new ArrayList<UnixMountEntry>();

        try {

            long iter = BsdNativeDispatcher.getfsstat();

            try {

                for (;;) {

                    UnixMountEntry entry = new UnixMountEntry();

                    int res = BsdNativeDispatcher.fsstatEntry(iter, entry);

                    if (res < 0)

                        break;

                    entries.add(entry);

                }

            } finally {

                BsdNativeDispatcher.endfsstat(iter);

            }

        } catch (UnixException x) {

            // nothing we can do

        }

        return entries;

    }

    @Override

    FileStore getFileStore(UnixMountEntry entry) throws IOException {

        return new BsdFileStore(this, entry);

    }

}