/*

 * Copyright (c) 2008, 2010, 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.io.IOException;

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

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

/**

 * Solaris implementation of FileStore

 */

class SolarisFileStore

    extends UnixFileStore

{

    private final boolean xattrEnabled;

    SolarisFileStore(UnixPath file) throws IOException {

        super(file);

        this.xattrEnabled = xattrEnabled();

    }

    SolarisFileStore(UnixFileSystem fs, UnixMountEntry entry) throws IOException {

        super(fs, entry);

        this.xattrEnabled = xattrEnabled();

    }

    // returns true if extended attributes enabled

    private boolean xattrEnabled() {

        long res = 0L;

        try {

            res = pathconf(file(), _PC_XATTR_ENABLED);

        } catch (UnixException x) {

            // ignore

        }

        return (res != 0L);

    }

    @Override

    UnixMountEntry findMountEntry() throws IOException {

        // On Solaris iterate over the entries in the mount table to find device

        for (UnixMountEntry entry: file().getFileSystem().getMountEntries()) {

            if (entry.dev() == dev()) {

                return entry;

            }

        }

        throw new IOException("Device not found in mnttab");

    }

    @Override

    public boolean supportsFileAttributeView(Class<? extends FileAttributeView> type) {

        if (type == AclFileAttributeView.class) {

            // lookup fstypes.properties

            FeatureStatus status = checkIfFeaturePresent("nfsv4acl");

            switch (status) {

                case PRESENT     : return true;

                case NOT_PRESENT : return false;

                default :

                    // AclFileAttributeView available on ZFS

                    return (type().equals("zfs"));

            }

        }

        if (type == UserDefinedFileAttributeView.class) {

            // lookup fstypes.properties

            FeatureStatus status = checkIfFeaturePresent("xattr");

            switch (status) {

                case PRESENT     : return true;

                case NOT_PRESENT : return false;

                default :

                    // UserDefinedFileAttributeView available if extended

                    // attributes supported

                    return xattrEnabled;

            }

        }

        return super.supportsFileAttributeView(type);

    }

    @Override

    public boolean supportsFileAttributeView(String name) {

        if (name.equals("acl"))

            return supportsFileAttributeView(AclFileAttributeView.class);

        if (name.equals("user"))

            return supportsFileAttributeView(UserDefinedFileAttributeView.class);

        return super.supportsFileAttributeView(name);

    }

}