jdk/src/solaris/classes/sun/nio/fs/GnomeFileTypeDetector.java
changeset 2057 3acf8e5e2ca0
child 5506 202f599c92aa
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/solaris/classes/sun/nio/fs/GnomeFileTypeDetector.java	Sun Feb 15 12:25:54 2009 +0000
@@ -0,0 +1,101 @@
+/*
+ * 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.FileRef;
+import java.io.IOException;
+import java.security.AccessController;
+import java.security.PrivilegedAction;
+
+/**
+ * File type detector that uses the GNOME I/O library or the deprecated
+ * GNOME VFS to guess the MIME type of a file.
+ */
+
+public class GnomeFileTypeDetector
+    extends AbstractFileTypeDetector
+{
+    private static final String GNOME_VFS_MIME_TYPE_UNKNOWN =
+        "application/octet-stream";
+
+    // true if GIO available
+    private final boolean gioAvailable;
+
+    // true if GNOME VFS available and GIO is not available
+    private final boolean gnomeVfsAvailable;
+
+    public GnomeFileTypeDetector() {
+        gioAvailable = initializeGio();
+        if (gioAvailable) {
+            gnomeVfsAvailable = false;
+        } else {
+            gnomeVfsAvailable = initializeGnomeVfs();
+        }
+    }
+
+    @Override
+    public String implProbeContentType(FileRef obj) throws IOException {
+        if (!gioAvailable && !gnomeVfsAvailable)
+            return null;
+        if (!(obj instanceof UnixPath))
+            return null;
+
+        UnixPath path = (UnixPath)obj;
+        NativeBuffer buffer = NativeBuffers.asNativeBuffer(path.getByteArrayForSysCalls());
+        try {
+            if (gioAvailable) {
+                byte[] type = probeUsingGio(buffer.address());
+                return (type == null) ? null : new String(type);
+            } else {
+                byte[] type = probeUsingGnomeVfs(buffer.address());
+                if (type == null)
+                    return null;
+                String s = new String(type);
+                return s.equals(GNOME_VFS_MIME_TYPE_UNKNOWN) ? null : s;
+            }
+
+        } finally {
+            buffer.release();
+        }
+
+    }
+
+    // GIO
+    private static native boolean initializeGio();
+    private static native byte[] probeUsingGio(long pathAddress);
+
+    // GNOME VFS
+    private static native boolean initializeGnomeVfs();
+    private static native byte[] probeUsingGnomeVfs(long pathAddress);
+
+    static {
+        AccessController.doPrivileged(new PrivilegedAction<Void>() {
+            public Void run() {
+                System.loadLibrary("nio");
+                return null;
+        }});
+    }
+}