author | alanb |
Fri, 28 Jan 2011 09:28:43 +0000 | |
changeset 8158 | 77d9c0f1c19f |
parent 5506 | 202f599c92aa |
child 9035 | 1255eb81cc2f |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2008, 2009, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package sun.nio.fs; |
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import java.nio.file.Path; |
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import java.io.IOException; |
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import java.security.AccessController; |
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import java.security.PrivilegedAction; |
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/** |
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* File type detector that uses the GNOME I/O library or the deprecated |
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* GNOME VFS to guess the MIME type of a file. |
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*/ |
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public class GnomeFileTypeDetector |
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extends AbstractFileTypeDetector |
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{ |
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private static final String GNOME_VFS_MIME_TYPE_UNKNOWN = |
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"application/octet-stream"; |
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// true if GIO available |
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private final boolean gioAvailable; |
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// true if GNOME VFS available and GIO is not available |
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private final boolean gnomeVfsAvailable; |
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public GnomeFileTypeDetector() { |
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gioAvailable = initializeGio(); |
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if (gioAvailable) { |
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gnomeVfsAvailable = false; |
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} else { |
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gnomeVfsAvailable = initializeGnomeVfs(); |
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} |
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} |
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@Override |
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public String implProbeContentType(Path obj) throws IOException { |
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if (!gioAvailable && !gnomeVfsAvailable) |
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return null; |
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if (!(obj instanceof UnixPath)) |
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return null; |
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UnixPath path = (UnixPath)obj; |
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NativeBuffer buffer = NativeBuffers.asNativeBuffer(path.getByteArrayForSysCalls()); |
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try { |
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if (gioAvailable) { |
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byte[] type = probeUsingGio(buffer.address()); |
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return (type == null) ? null : new String(type); |
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} else { |
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byte[] type = probeUsingGnomeVfs(buffer.address()); |
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if (type == null) |
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return null; |
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String s = new String(type); |
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return s.equals(GNOME_VFS_MIME_TYPE_UNKNOWN) ? null : s; |
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} |
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} finally { |
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buffer.release(); |
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} |
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} |
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// GIO |
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private static native boolean initializeGio(); |
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private static native byte[] probeUsingGio(long pathAddress); |
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// GNOME VFS |
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private static native boolean initializeGnomeVfs(); |
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private static native byte[] probeUsingGnomeVfs(long pathAddress); |
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static { |
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AccessController.doPrivileged(new PrivilegedAction<Void>() { |
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public Void run() { |
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System.loadLibrary("nio"); |
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return null; |
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}}); |
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} |
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} |