| /* 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 ()); |
| } |
| } |