gnu.classpath.jdwp.transport
Class JdwpPacket
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
JdwpCommandPacket and
JdwpReplyPacket.
protected static int | JDWP_FLAG_REPLY
|
protected static int | MINIMUM_SIZE- Minimum packet size excluding sub-class data
( length (4) + id (4) + flags (1) )
|
protected byte[] | _data- Packet-specific data
|
protected byte | _flags- Packet flags
|
protected int | _id- Id of command/reply
|
protected static int | _last_id
|
static JdwpPacket | fromBytes(byte[] bytes)- Convert the given bytes into a
JdwpPacket.
|
byte[] | getData()- Gets the command/reply-specific data in this packet
|
byte | getFlags()- Returns the packet flags
|
int | getId()- Returns the packet id
|
int | getLength()- Returns the length of this entire packet
|
protected abstract int | myFromBytes(byte[] bytes, int index)- Allow subclasses to initialize from data
|
protected abstract void | myWrite(DataOutputStream dos)- Put subclass information onto the stream
|
void | setData(byte[] data)- Sets the command/reply-specific data in this packet
|
void | setFlags(byte flags)- Sets the packet flags
|
void | setId(int id)- Sets the packet id
|
void | write(DataOutputStream dos)- Writes the packet to the output stream
|
clone, equals, extends Object> getClass, finalize, hashCode, notify, notifyAll, toString, wait, wait, wait |
MINIMUM_SIZE
protected static final int MINIMUM_SIZE
Minimum packet size excluding sub-class data
( length (4) + id (4) + flags (1) )
_data
protected byte[] _data
Packet-specific data
_flags
protected byte _flags
Packet flags
_id
protected int _id
Id of command/reply
JdwpPacket
public JdwpPacket(JdwpPacket pkt)
Constructs a JdwpPacket with the id
from the given packet.
pkt - a packet whose id will be used in this new packet
fromBytes
public static JdwpPacket fromBytes(byte[] bytes)
Convert the given bytes into a JdwpPacket. Uses the
abstract method myFromBytes to allow subclasses to
process data.
If the given data does not represent a valid JDWP packet, it returns
null.
bytes - packet data from the wire
- number of bytes in
bytes processed
getData
public byte[] getData()
Gets the command/reply-specific data in this packet
getFlags
public byte getFlags()
Returns the packet flags
getId
public int getId()
Returns the packet id
getLength
public int getLength()
Returns the length of this entire packet
myFromBytes
protected abstract int myFromBytes(byte[] bytes,
int index) Allow subclasses to initialize from data
bytes - packet data from the wireindex - index into bytes to start processing
- number of bytes in
bytes processed
setData
public void setData(byte[] data)
Sets the command/reply-specific data in this packet
setFlags
public void setFlags(byte flags)
Sets the packet flags
setId
public void setId(int id)
Sets the packet id
JdwpPacket.java -- Base class for JDWP command and reply packets
Copyright (C) 2005 Free Software Foundation
This file is part of GNU Classpath.
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