--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/java.management/share/classes/sun/management/jdp/JdpPacketWriter.java	Sun Aug 17 15:54:13 2014 +0100
@@ -0,0 +1,98 @@
+/*
+ * Copyright (c) 2013, Oracle and/or its affiliates. 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.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package sun.management.jdp;
+
+import java.io.ByteArrayOutputStream;
+import java.io.DataOutputStream;
+import java.io.IOException;
+
+/**
+ * JdpPacketWriter responsible for writing a packet
+ * <p>This class assembles a set of key/value pairs to valid JDP packet,
+ * ready to be sent across a Net</p>
+ */
+public final class JdpPacketWriter {
+
+    private final ByteArrayOutputStream baos;
+    private final DataOutputStream pkt;
+
+    /**
+     * Create a JDP packet, add mandatory magic and version headers
+     *
+     * @throws IOException
+     */
+    public JdpPacketWriter()
+            throws IOException {
+        baos = new ByteArrayOutputStream();
+        pkt = new DataOutputStream(baos);
+
+        pkt.writeInt(JdpGenericPacket.getMagic());
+        pkt.writeShort(JdpGenericPacket.getVersion());
+    }
+
+    /**
+     * Put string entry to packet
+     *
+     * @param entry - string to put (utf-8 encoded)
+     * @throws IOException
+     */
+    public void addEntry(String entry)
+            throws IOException {
+        /* DataOutputStream.writeUTF() do essentially
+         *  the same as:
+         *    pkt.writeShort(entry.getBytes("UTF-8").length);
+         *    pkt.write(entry.getBytes("UTF-8"));
+         */
+        pkt.writeUTF(entry);
+    }
+
+    /**
+     * Put key/value pair to packet
+     *
+     * @param key - key to put (utf-8 encoded)
+     * @param val - value to put (utf-8 encoded)
+     * @throws IOException
+     */
+    public void addEntry(String key, String val)
+            throws IOException {
+        /* Silently skip key if value is null.
+         * We don't need to distinguish between key missing
+         * and key has no value cases
+         */
+        if (val != null) {
+            addEntry(key);
+            addEntry(val);
+        }
+    }
+
+    /**
+     * Return assembled packet as a byte array
+     *
+     * @return packet bytes
+     */
+    public byte[] getPacketBytes() {
+        return baos.toByteArray();
+    }
+}