893N/A/*
3909N/A * Copyright (c) 2008, 2011, Oracle and/or its affiliates. All rights reserved.
893N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
893N/A *
893N/A * This code is free software; you can redistribute it and/or modify it
893N/A * under the terms of the GNU General Public License version 2 only, as
2362N/A * published by the Free Software Foundation. Oracle designates this
893N/A * particular file as subject to the "Classpath" exception as provided
2362N/A * by Oracle in the LICENSE file that accompanied this code.
893N/A *
893N/A * This code is distributed in the hope that it will be useful, but WITHOUT
893N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
893N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
893N/A * version 2 for more details (a copy is included in the LICENSE file that
893N/A * accompanied this code).
893N/A *
893N/A * You should have received a copy of the GNU General Public License version
893N/A * 2 along with this work; if not, write to the Free Software Foundation,
893N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
893N/A *
2362N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
2362N/A * or visit www.oracle.com if you need additional information or have any
2362N/A * questions.
893N/A */
893N/A
893N/Apackage sun.nio.fs;
893N/A
3471N/Aimport java.nio.file.Path;
893N/Aimport java.io.IOException;
893N/Aimport java.security.AccessController;
893N/Aimport java.security.PrivilegedAction;
893N/A
893N/A/**
893N/A * File type detector that uses the GNOME I/O library or the deprecated
893N/A * GNOME VFS to guess the MIME type of a file.
893N/A */
893N/A
893N/Apublic class GnomeFileTypeDetector
893N/A extends AbstractFileTypeDetector
893N/A{
893N/A private static final String GNOME_VFS_MIME_TYPE_UNKNOWN =
893N/A "application/octet-stream";
893N/A
893N/A // true if GIO available
893N/A private final boolean gioAvailable;
893N/A
893N/A // true if GNOME VFS available and GIO is not available
893N/A private final boolean gnomeVfsAvailable;
893N/A
893N/A public GnomeFileTypeDetector() {
893N/A gioAvailable = initializeGio();
893N/A if (gioAvailable) {
893N/A gnomeVfsAvailable = false;
893N/A } else {
893N/A gnomeVfsAvailable = initializeGnomeVfs();
893N/A }
893N/A }
893N/A
893N/A @Override
3471N/A public String implProbeContentType(Path obj) throws IOException {
893N/A if (!gioAvailable && !gnomeVfsAvailable)
893N/A return null;
893N/A if (!(obj instanceof UnixPath))
893N/A return null;
893N/A
893N/A UnixPath path = (UnixPath)obj;
893N/A NativeBuffer buffer = NativeBuffers.asNativeBuffer(path.getByteArrayForSysCalls());
893N/A try {
893N/A if (gioAvailable) {
6252N/A // GIO may access file so need permission check
6252N/A path.checkRead();
893N/A byte[] type = probeUsingGio(buffer.address());
893N/A return (type == null) ? null : new String(type);
893N/A } else {
893N/A byte[] type = probeUsingGnomeVfs(buffer.address());
893N/A if (type == null)
893N/A return null;
893N/A String s = new String(type);
893N/A return s.equals(GNOME_VFS_MIME_TYPE_UNKNOWN) ? null : s;
893N/A }
893N/A } finally {
893N/A buffer.release();
893N/A }
893N/A
893N/A }
893N/A
893N/A // GIO
893N/A private static native boolean initializeGio();
893N/A private static native byte[] probeUsingGio(long pathAddress);
893N/A
893N/A // GNOME VFS
893N/A private static native boolean initializeGnomeVfs();
893N/A private static native byte[] probeUsingGnomeVfs(long pathAddress);
893N/A
893N/A static {
893N/A AccessController.doPrivileged(new PrivilegedAction<Void>() {
893N/A public Void run() {
893N/A System.loadLibrary("nio");
893N/A return null;
893N/A }});
893N/A }
893N/A}