author | bpb |
Thu, 06 Aug 2015 12:35:59 -0700 | |
changeset 32042 | 67cb76150baa |
parent 29986 | 97167d851fc4 |
child 32095 | 85de9b55de5b |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2008, 2015, 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 to guess the |
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* 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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// true if GIO is available |
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private final boolean gioAvailable; |
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public GnomeFileTypeDetector() { |
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gioAvailable = initializeGio(); |
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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) |
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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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// GIO may access file so need permission check |
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path.checkRead(); |
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byte[] type = probeGio(buffer.address()); |
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return (type == null) ? null : Util.toString(type); |
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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[] probeGio(long pathAddress); |
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static { |
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AccessController.doPrivileged(new PrivilegedAction<>() { |
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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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} |