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+/* JdwpCommandPacket.java -- JDWP command packet
+ Copyright (C) 2005 Free Software Foundation
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath 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 for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING. If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library. Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module. An independent module is a module which is not derived from
+or based on this library. If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so. If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package gnu.classpath.jdwp.transport;
+
+import java.io.DataOutputStream;
+import java.io.IOException;
+
+/**
+ * A class representing a JDWP command packet.
+ * This class adds command set and command to the packet header
+ * information in {@link gnu.classpath.jdwp.transport.JdwpPacket}
+ * and adds additional command packet-specific processing.
+ *
+ * @author Keith Seitz <keiths@redhat.com>
+ */
+public class JdwpCommandPacket extends JdwpPacket
+{
+ /**
+ * Command set
+ */
+ protected byte _commandSet;
+
+ /**
+ * Command
+ */
+ protected byte _command;
+
+ // Minimum packet size [excluding super class]
+ // ( commandSet (1) + command (1) )
+ private static final int MINIMUM_LENGTH = 2;
+
+ /**
+ * Constructs a new <code>JdwpCommandPacket</code>
+ */
+ public JdwpCommandPacket ()
+ {
+ // Don't assign an id. This constructor is called by
+ // JdwpPacket.fromBytes, and that will assign a packet id.
+ }
+
+ /**
+ * Constructs a new <code>JdwpCommandPacket</code>
+ * with the given command set and command
+ *
+ * @param set the command set
+ * @param command the command
+ */
+ public JdwpCommandPacket (byte set, byte command)
+ {
+ _id = ++_last_id;
+ _commandSet = set;
+ _command = command;
+ }
+
+ /**
+ * Retuns the length of this packet
+ */
+ public int getLength ()
+ {
+ return MINIMUM_LENGTH + super.getLength ();
+ }
+
+ /**
+ * Returns the command set
+ */
+ public byte getCommandSet ()
+ {
+ return _commandSet;
+ }
+
+ /**
+ * Sets the command set
+ */
+ public void setCommandSet (byte cs)
+ {
+ _commandSet = cs;
+ }
+
+ /**
+ * Returns the command
+ */
+ public byte getCommand ()
+ {
+ return _command;
+ }
+
+ /**
+ * Sets the command
+ */
+ public void setCommand (byte cmd)
+ {
+ _command = cmd;
+ }
+
+ // Reads command packet data from the given buffer, starting
+ // at the given offset
+ protected int myFromBytes (byte[] bytes, int index)
+ {
+ int i = 0;
+ setCommandSet (bytes[index + i++]);
+ setCommand (bytes[index + i++]);
+ return i;
+ }
+
+ // Writes the command packet data into the given buffer
+ protected void myWrite (DataOutputStream dos)
+ throws IOException
+ {
+ dos.writeByte (getCommandSet ());
+ dos.writeByte (getCommand ());
+ }
+}