/*
* Copyright (c) 2006-2009, KNOPFLERFISH project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* - Neither the name of the KNOPFLERFISH project nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/**
* @author Philippe Laporte
*/
package org.knopflerfish.bundle.connectors.datagram;
import java.io.IOException;
import java.net.DatagramSocket;
import java.net.SocketException;
import javax.microedition.io.Datagram;
import javax.microedition.io.UDPDatagramConnection;
class DatagramConnectionAdapter implements UDPDatagramConnection {
private final DatagramSocket socket;
private final String address;
private final DatagramConnectionFactory factory;
public DatagramConnectionAdapter(DatagramConnectionFactory factory,
String address, boolean timeouts)
throws SocketException
{
this.factory = factory;
this.address = address;
if (address == null || !address.startsWith("datagram://")) {
throw new IllegalArgumentException("Excepted datagram://-address");
}
int portSep = address.lastIndexOf(':');
if (portSep < 10) // the portSep needs to lie past "datagram://"
throw new IllegalArgumentException("Missing port");
String strPort = null;
strPort = address.substring(portSep + 1, address.length());
int port = 0;
try {
port = Integer.parseInt(strPort);
} catch (NumberFormatException e) {
throw new IllegalArgumentException("Invalid port");
}
String host = address.substring(11, portSep); // 11 = "datagram://"
if (host.equals("")) {
// A server: Listen on a special port.
socket = new DatagramSocket(port);
} else {
// A client: Any port will do
socket = new DatagramSocket();
}
if (!timeouts)
socket.setSoTimeout(0);
factory.registerConnection(this);
}
public int getMaximumLength() throws IOException {
// TODO: maybe?
return Math.max(socket.getReceiveBufferSize(),
socket.getSendBufferSize());
}
public int getNominalLength() throws IOException {
// TODO: is this correct?
return Math.min(socket.getReceiveBufferSize(),
socket.getSendBufferSize());
}
public void send(Datagram datagram) throws IOException {
if (!(datagram instanceof DatagramImpl)) {
throw new IllegalArgumentException("Datagram is of wrong type");
}
socket.send(((DatagramImpl)datagram).getDatagramPacket());
}
public void receive(Datagram datagram) throws IOException {
if(!(datagram instanceof DatagramImpl)){
throw new IllegalArgumentException("Datagram is of wrong type");
}
socket.receive(((DatagramImpl)datagram).getDatagramPacket());
}
public Datagram newDatagram(int size) throws IOException {
return newDatagram(size, address);
}
public Datagram newDatagram(int size, String address) throws IOException {
return newDatagram(new byte[size], size, address);
}
public Datagram newDatagram(byte[] buf, int size) throws IOException {
return newDatagram(buf, size, address);
}
public Datagram newDatagram(byte[] buf, int size, String address)
throws IOException
{
return new DatagramImpl(buf, size, address);
}
public void close() throws IOException {
factory.unregisterConnection(this);
socket.close();
}
public String getLocalAddress()
throws IOException {
return socket.getLocalAddress().getHostAddress();
}
public int getLocalPort()
throws IOException {
return socket.getLocalPort();
}
}