/*

 * Copyright 2008-2009 Sun Microsystems, Inc.  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.  Sun designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

 * CA 95054 USA or visit www.sun.com if you need additional information or

 * have any questions.

 */

package sun.nio.fs;

import java.nio.file.*;

import java.nio.file.attribute.*;

import java.io.IOException;

import java.util.*;

import java.security.AccessController;

import sun.security.action.GetPropertyAction;

import static sun.nio.fs.UnixNativeDispatcher.*;

/**

 * Solaris implementation of FileSystem

 */

class SolarisFileSystem extends UnixFileSystem {

    private final boolean hasSolaris11Features;

    SolarisFileSystem(UnixFileSystemProvider provider, String dir) {

        super(provider, dir);

        // check os.version

        String osversion = AccessController

            .doPrivileged(new GetPropertyAction("os.version"));

        String[] vers = osversion.split("\\.", 0);

        assert vers.length >= 2;

        int majorVersion = Integer.parseInt(vers[0]);

        int minorVersion = Integer.parseInt(vers[1]);

        this.hasSolaris11Features =

            (majorVersion > 5 || (majorVersion == 5 && minorVersion >= 11));

    }

    @Override

    boolean isSolaris() {

        return true;

    }

    @Override

    public WatchService newWatchService()

        throws IOException

    {

        // FEN available since Solaris 11

        if (hasSolaris11Features) {

            return new SolarisWatchService(this);

        } else {

            return new PollingWatchService();

        }

    }

    @Override

    @SuppressWarnings("unchecked")

    public <V extends FileAttributeView> V newFileAttributeView(Class<V> view,

                                                                UnixPath file, LinkOption... options)

    {

        if (view == AclFileAttributeView.class)

            return (V) new SolarisAclFileAttributeView(file, followLinks(options));

        if (view == UserDefinedFileAttributeView.class) {

            return(V) new SolarisUserDefinedFileAttributeView(file, followLinks(options));

        }

        return super.newFileAttributeView(view, file, options);

    }

    @Override

    protected FileAttributeView newFileAttributeView(String name,

                                                     UnixPath file,

                                                     LinkOption... options)

    {

        if (name.equals("acl"))

            return new SolarisAclFileAttributeView(file, followLinks(options));

        if (name.equals("xattr"))

            return new SolarisUserDefinedFileAttributeView(file, followLinks(options));

        return super.newFileAttributeView(name, file, options);

    }

    // 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(UnixFileSystem.standardFileAttributeViews());

            // additional Solaris-specific views

            result.add("acl");

            result.add("xattr");

            return Collections.unmodifiableSet(result);

        }

    }

    @Override

    public Set<String> supportedFileAttributeViews() {

        return SupportedFileFileAttributeViewsHolder.supportedFileAttributeViews;

    }

    @Override

    void copyNonPosixAttributes(int ofd, int nfd) {

        SolarisUserDefinedFileAttributeView.copyExtendedAttributes(ofd, nfd);

        // TDB: copy ACL from source to target

    }

    @Override

    boolean supportsSecureDirectoryStreams() {

        return true;

    }

    /**

     * Returns object to iterate over entries in /etc/mnttab

     */

    @Override

    Iterable<UnixMountEntry> getMountEntries() {

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

        try {

            UnixPath mnttab = new UnixPath(this, "/etc/mnttab");

            long fp = fopen(mnttab, "r");

            try {

                for (;;) {

                    UnixMountEntry entry = new UnixMountEntry();

                    int res = getextmntent(fp, entry);

                    if (res < 0)

                        break;

                    entries.add(entry);

                }

            } finally {

                fclose(fp);

            }

        } catch (UnixException x) {

            // nothing we can do

        }

        return entries;

    }

    @Override

    FileStore getFileStore(UnixPath path) throws IOException {

        return new SolarisFileStore(path);

    }

    @Override

    FileStore getFileStore(UnixMountEntry entry) throws IOException {

        return new SolarisFileStore(this, entry);

    }

}