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Diffstat (limited to 'libjava/gnu/classpath/jdwp/transport/JdwpPacket.java')
| -rw-r--r-- | libjava/gnu/classpath/jdwp/transport/JdwpPacket.java | 278 |
1 files changed, 0 insertions, 278 deletions
diff --git a/libjava/gnu/classpath/jdwp/transport/JdwpPacket.java b/libjava/gnu/classpath/jdwp/transport/JdwpPacket.java deleted file mode 100644 index 7fa93e2de1b..00000000000 --- a/libjava/gnu/classpath/jdwp/transport/JdwpPacket.java +++ /dev/null @@ -1,278 +0,0 @@ -/* JdwpPacket.java -- Base class for JDWP command and reply packets - 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; - -/** - * All command and reply packets in JDWP share - * common header type information: - * - * length (4 bytes) : size of entire packet, including length - * id (4 bytes) : unique packet id - * flags (1 byte) : flag byte - * [command packet stuff | reply packet stuff] - * data (variable) : unique command-/reply-specific data - * - * This class deal with everything except the command- and reply-specific - * data, which get handled in {@link - * gnu.classpath.jdwp.transport.JdwpCommandPacket} and {@link - * gnu.classpath.jdwp.transprot.JdwpReplyPacket}. - * - * @author Keith Seitz <keiths@redhat.com> - */ -public abstract class JdwpPacket -{ - // Last id of packet constructed - protected static int _last_id = 0; - - // JDWP reply packet flag - protected static final int JDWP_FLAG_REPLY = 0x80; - - /** - * Minimum packet size excluding sub-class data - * ( length (4) + id (4) + flags (1) ) - */ - protected static final int MINIMUM_SIZE = 9; - - /** - * Id of command/reply - */ - protected int _id; - - /** - * Packet flags - */ - protected byte _flags; - - /** - * Packet-specific data - */ - protected byte[] _data; - - /** - * Constructor - */ - public JdwpPacket () - { - // By default, DON'T assign an id. This way when a packet - // is constructed from fromBytes, _last_id won't increment (i.e., - // it won't leave holes in the outgoing packet ids). - } - - /** - * Constructs a <code>JdwpPacket</code> with the id - * from the given packet. - * - * @param pkt a packet whose id will be used in this new packet - */ - public JdwpPacket (JdwpPacket pkt) - { - _id = pkt.getId (); - } - - /** - * Returns the packet id - */ - public int getId () - { - return _id; - } - - /** - * Sets the packet id - */ - public void setId (int id) - { - _id = id; - } - - /** - * Returns the packet flags - */ - public byte getFlags () - { - return _flags; - } - - /** - * Sets the packet flags - */ - public void setFlags (byte flags) - { - _flags = flags; - } - - /** - * Gets the command/reply-specific data in this packet - */ - public byte[] getData () - { - return _data; - } - - /** - * Sets the command/reply-specific data in this packet - */ - public void setData (byte[] data) - { - _data = data; - } - - /** - * Returns the length of this entire packet - */ - public int getLength () - { - return MINIMUM_SIZE + (_data == null ? 0 : _data.length); - } - - /** - * Allow subclasses to initialize from data - * - * @param bytes packet data from the wire - * @param index index into <code>bytes</code> to start processing - * @return number of bytes in <code>bytes</code> processed - */ - protected abstract int myFromBytes (byte[] bytes, int index); - - /** - * Convert the given bytes into a <code>JdwpPacket</code>. Uses the - * abstract method <code>myFromBytes</code> to allow subclasses to - * process data. - * - * If the given data does not represent a valid JDWP packet, it returns - * <code>null</code>. - * - * @param bytes packet data from the wire - * @param index index into <code>bytes</code> to start processing - * @return number of bytes in <code>bytes</code> processed - */ - public static JdwpPacket fromBytes (byte[] bytes) - { - int i = 0; - int length = ((bytes[i++] & 0xff) << 24 | (bytes[i++] & 0xff) << 16 - | (bytes[i++] & 0xff) << 8 | (bytes[i++] & 0xff)); - int id = 0; - byte flags = 0; - - if (bytes.length == length) - { - id = ((bytes[i++] & 0xff) << 24 | (bytes[i++] & 0xff) << 16 - | (bytes[i++] & 0xff) << 8 | (bytes[i++] & 0xff)); - flags = bytes[i++]; - - Class clazz = null; - if (flags == 0) - clazz = JdwpCommandPacket.class; - else if ((flags & JDWP_FLAG_REPLY) != 0) - clazz = JdwpReplyPacket.class; - else - { - // Malformed packet. Discard it. - return null; - } - - JdwpPacket pkt = null; - try - { - pkt = (JdwpPacket) clazz.newInstance (); - } - catch (InstantiationException ie) - { - // Discard packet - return null; - } - catch (IllegalAccessException iae) - { - // Discard packet - return null; - } - - pkt.setId (id); - pkt.setFlags (flags); - - i += pkt.myFromBytes (bytes, i); - byte[] data = new byte[length - i]; - System.arraycopy (bytes, i, data, 0, data.length); - pkt.setData (data); - - return pkt; - } - - return null; - } - - /** - * Put subclass information onto the stream - * - * @param dos the output stream to which to write - */ - protected abstract void myWrite (DataOutputStream dos) - throws IOException; - - /** - * Writes the packet to the output stream - * - * @param dos the output stream to which to write the packet - */ - public void write (DataOutputStream dos) - throws IOException - { - // length - int length = getLength (); - dos.writeInt (length); - - // ID - dos.writeInt (getId ()); - - // flag - dos.writeByte (getFlags ()); - - // packet-specific stuff - myWrite (dos); - - // data (if any) - byte[] data = getData (); - if (data != null && data.length > 0) - dos.write (data, 0, data.length); - } -} |
