org.openbandy.net
Class ConnectionHelper

java.lang.Object
  org.openbandy.net.ConnectionHelper

public class ConnectionHelper
extends java.lang.Object

Helper class which provides static methods to read and write message to and from a stream. Every transmission starts with an int which denotes the content of the stream (e.g. ACK).

(c) Copyright Philipp Bolliger 2007, ALL RIGHTS RESERVED.

Version:

0.5

Author:

Philipp Bolliger (philipp@bolliger.name)

Field Summary

static int	ACK
static int	INVALID_MSG
static int	VALID_MSG

Constructor Summary

ConnectionHelper()

Method Summary

static Message	readMessage(java.io.DataInputStream dataInputStream) Tries to read a message from the input stream.
static void	writeMessage(Message message, java.io.DataOutputStream dataOutputStream) Writes the message to the output stream given
static void	writeStatus(int status, java.io.DataOutputStream dataOutputStream) Send an status (ACK | VALID_MSG | INVALID_MSG) to the output stream given

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

ACK

public static final int ACK

See Also:

Constant Field Values

VALID_MSG

public static final int VALID_MSG

See Also:

Constant Field Values

INVALID_MSG

public static final int INVALID_MSG

See Also:

Constant Field Values

Constructor Detail

ConnectionHelper

public ConnectionHelper()

Method Detail

readMessage

public static Message readMessage(java.io.DataInputStream dataInputStream)

Tries to read a message from the input stream.

Parameters:

dataInputStream - Input stream from which to read

Returns:

A message or null if nothing could be read

writeMessage

public static void writeMessage(Message message,
                                java.io.DataOutputStream dataOutputStream)

Writes the message to the output stream given

Parameters:

message - Message to be written

dataOutputStream - Output stream on which to write the message

writeStatus

public static void writeStatus(int status,
                               java.io.DataOutputStream dataOutputStream)

Send an status (ACK | VALID_MSG | INVALID_MSG) to the output stream given

Parameters:

status - status to write (ACK | VALID_MSG | INVALID_MSG)

dataOutputStream - Output stream on which to write the status