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+/* JdwpReplyPacket.java -- JDWP reply 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 represents a JDWP reply packet.
+ * This class adds an error code to the packet header information
+ * in {@link gnu.classpath.jdwp.transport.JdwpPacket} and adds additional
+ * reply packet-specific processing.
+ *
+ * @author Keith Seitz <keiths@redhat.com>
+ */
+public class JdwpReplyPacket extends JdwpPacket
+{
+ /**
+ * Error code
+ */
+ protected short _errorCode;
+
+ // Minimum packet size [excluding super class] ( errorCode (2) )
+ private static final int MINIMUM_LENGTH = 2;
+
+ /**
+ * Constructs a <code>JdwpReplyPacket</code>.
+ */
+ public JdwpReplyPacket ()
+ {
+ // Don't assign a packet id. This is called by JdwpPacket.fromBytes
+ // which assigns a packet id. (Not that a VM would do that...)
+ }
+
+ /**
+ * Constructs a <code>JdwpReplyPacket</code> with the
+ * id from the given packet and error code
+ *
+ * @param pkt the packet whose id this packet will use
+ * @param errorCode the error code
+ */
+ public JdwpReplyPacket (JdwpPacket pkt, short errorCode)
+ {
+ this(pkt);
+ _errorCode = errorCode;
+ }
+
+ /**
+ * Constructs a <code>JdwpReplyPacket</code> with the
+ * id from the given packet and an empty error code
+ *
+ * @param pkt the packet whose id this packet will use
+ */
+ public JdwpReplyPacket (JdwpPacket pkt)
+ {
+ super (pkt);
+ _flags = (byte) JDWP_FLAG_REPLY;
+ }
+
+ /**
+ * Returns the length of this packet
+ */
+ public int getLength ()
+ {
+ return MINIMUM_LENGTH + super.getLength ();
+ }
+
+ /**
+ * Returns the error code
+ */
+ public short getErrorCode ()
+ {
+ return _errorCode;
+ }
+
+ /**
+ * Sets the error code
+ */
+ public void setErrorCode (short ec)
+ {
+ _errorCode = ec;
+ }
+
+ // Reads command packet data from the given buffer, starting
+ // at the given offset
+ protected int myFromBytes (byte[] bytes, int index)
+ {
+ int i = 0;
+ setErrorCode ((short) ((bytes[index + i++] & 0xff) << 8
+ | (bytes[index + i++] & 0xff)));
+ return i;
+ }
+
+ // Writes the command packet data into the given buffer
+ protected void myWrite (DataOutputStream dos)
+ throws IOException
+ {
+ dos.writeShort (getErrorCode ());
+ }
+}