--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/sample/nio/file/Xdd.java	Sun Feb 15 12:25:54 2009 +0000
@@ -0,0 +1,112 @@
+/*
+ * Copyright 2008-2009 Sun Microsystems, Inc.  All Rights Reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ *   - Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ *
+ *   - Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ *
+ *   - Neither the name of Sun Microsystems nor the names of its
+ *     contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+import java.nio.ByteBuffer;
+import java.nio.charset.Charset;
+import java.nio.file.*;
+import java.nio.file.attribute.*;
+import java.io.IOException;
+
+/**
+ * Example code to list/set/get/delete the user-defined attributes of a file.
+ */
+
+public class Xdd {
+
+    static void usage() {
+        System.out.println("Usage: java Xdd <file>");
+        System.out.println("       java Xdd -set <name>=<value> <file>");
+        System.out.println("       java Xdd -get <name> <file>");
+        System.out.println("       java Xdd -del <name> <file>");
+        System.exit(-1);
+    }
+
+    public static void main(String[] args) throws IOException {
+        // one or three parameters
+        if (args.length != 1 && args.length != 3)
+            usage();
+
+        Path file = (args.length == 1) ?
+            Paths.get(args[0]) : Paths.get(args[2]);
+
+        // check that user defined attributes are supported by the file system
+        FileStore store = file.getFileStore();
+        if (!store.supportsFileAttributeView("xattr")) {
+            System.err.format("UserDefinedFileAttributeView not supported on %s\n", store);
+            System.exit(-1);
+
+        }
+        UserDefinedFileAttributeView view = file.
+            getFileAttributeView(UserDefinedFileAttributeView.class);
+
+        // list user defined attributes
+        if (args.length == 1) {
+            System.out.println("    Size  Name");
+            System.out.println("--------  --------------------------------------");
+            for (String name: view.list()) {
+                System.out.format("%8d  %s\n", view.size(name), name);
+            }
+            return;
+        }
+
+        // Add/replace a file's user defined attribute
+        if (args[0].equals("-set")) {
+            // name=value
+            String[] s = args[1].split("=");
+            if (s.length != 2)
+                usage();
+            String name = s[0];
+            String value = s[1];
+            view.write(name, Charset.defaultCharset().encode(value));
+            return;
+        }
+
+        // Print out the value of a file's user defined attribute
+        if (args[0].equals("-get")) {
+            String name = args[1];
+            int size = view.size(name);
+            ByteBuffer buf = ByteBuffer.allocateDirect(size);
+            view.read(name, buf);
+            buf.flip();
+            System.out.println(Charset.defaultCharset().decode(buf).toString());
+            return;
+        }
+
+        // Delete a file's user defined attribute
+        if (args[0].equals("-del")) {
+            view.delete(args[1]);
+            return;
+        }
+
+        // option not recognized
+        usage();
+    }
+ }