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/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
package com.sun.star.lib.connections.socket;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.Socket;
import java.util.ArrayList;
import java.util.Arrays;
import com.sun.star.connection.XConnection;
import com.sun.star.connection.XConnectionBroadcaster;
import com.sun.star.io.XStreamListener;
/**
* The SocketConnection implements the <code>XConnection</code> interface
* and is uses by the <code>SocketConnector</code> and the <code>SocketAcceptor</code>.
*
* <p>This class is not part of the provided <code>api</code>.</p>
*
* @see com.sun.star.lib.connections.socket.socketAcceptor
* @see com.sun.star.lib.connections.socket.socketConnector
* @see com.sun.star.connection.XConnection
* @since UDK1.0
*/
public class SocketConnection implements XConnection, XConnectionBroadcaster {
/**
* When set to true, enables various debugging output.
*/
static public final boolean DEBUG = false;
protected String _description;
protected Socket _socket;
protected InputStream _inputStream;
protected OutputStream _outputStream;
protected ArrayList<XStreamListener> _listeners;
protected boolean _firstRead;
/**
* Constructs a new <code>SocketConnection</code>.
*
* @param description the description of the connection.
* @param socket the socket of the connection.
*/
public SocketConnection(String description, Socket socket) throws IOException {
if (DEBUG) System.err.println("##### " + getClass().getName() + " - instantiated " + description + " " + socket);
_description = description
+ ",localHost=" + socket.getLocalAddress().getHostName()
+ ",localPort=" + socket.getLocalPort()
+ ",peerHost=" + socket.getInetAddress().getHostName()
+ ",peerPort=" + socket.getPort();
_socket = socket;
_inputStream = new BufferedInputStream(socket.getInputStream());
_outputStream = new BufferedOutputStream(socket.getOutputStream());
_listeners = new ArrayList<XStreamListener>();
_firstRead = true;
}
public void addStreamListener(XStreamListener aListener )
throws com.sun.star.uno.RuntimeException {
_listeners.add(aListener);
}
public void removeStreamListener(XStreamListener aListener )
throws com.sun.star.uno.RuntimeException {
_listeners.remove(aListener);
}
private void notifyListeners_open() {
for (XStreamListener xStreamListener : _listeners) {
xStreamListener.started();
}
}
private void notifyListeners_close() {
for (XStreamListener xStreamListener : _listeners) {
xStreamListener.closed();
}
}
private void notifyListeners_error(com.sun.star.uno.Exception exception) {
for (XStreamListener xStreamListener : _listeners) {
xStreamListener.error(exception);
}
}
/**
* Read the required number of bytes.
*
* @param bytes the outparameter, where the bytes have to be placed.
* @param nBytesToRead the number of bytes to read.
* @return the number of bytes read.
*
* @see com.sun.star.connection.XConnection#read
*/
public int read(/*OUT*/byte[][] bytes, int nBytesToRead)
throws com.sun.star.io.IOException, com.sun.star.uno.RuntimeException {
if(_firstRead) {
_firstRead = false;
notifyListeners_open();
}
String errMessage = null;
int read_bytes = 0;
bytes[0] = new byte[nBytesToRead];
try {
int count ;
do {
count = _inputStream.read(bytes[0], read_bytes, nBytesToRead - read_bytes);
if(count == -1)
errMessage = "EOF reached - " + getDescription();
read_bytes += count;
}
while(read_bytes >= 0 && read_bytes < nBytesToRead && count >= 0);
} catch(IOException ioException) {
if(DEBUG) {
System.err.println("##### " + getClass().getName() + ".read - exception occurred:" + ioException);
ioException.printStackTrace();
}
errMessage = ioException.toString();
}
if(errMessage != null) {
com.sun.star.io.IOException unoIOException = new com.sun.star.io.IOException(errMessage);
notifyListeners_error(unoIOException);
throw unoIOException;
}
if (DEBUG) System.err.println("##### " + getClass().getName() + " - read byte:" + read_bytes + " " + Arrays.toString(bytes[0]));
return read_bytes;
}
/**
* Write bytes.
*
* @param aData the bytes to write.
* @see com.sun.star.connection.XConnection#write
*/
public void write(byte aData[]) throws com.sun.star.io.IOException,
com.sun.star.uno.RuntimeException {
try {
_outputStream.write(aData);
} catch(IOException ioException) {
com.sun.star.io.IOException unoIOException = new com.sun.star.io.IOException(ioException);
notifyListeners_error(unoIOException);
throw unoIOException;
}
if (DEBUG) System.err.println("##### " + getClass().getName() + " - written bytes:" + Arrays.toString(aData) + " " + aData.length);
}
/**
* Flushes the buffer.
*
* @see com.sun.star.connection.XConnection#flush
*/
public void flush() throws com.sun.star.io.IOException,
com.sun.star.uno.RuntimeException {
try {
_outputStream.flush();
} catch(IOException ioException) {
com.sun.star.io.IOException unoIOException = new com.sun.star.io.IOException(ioException);
notifyListeners_error(unoIOException);
throw unoIOException;
}
}
/**
* Closes the connection.
*
* @see com.sun.star.connection.XConnection#close
*/
public void close() throws com.sun.star.io.IOException,
com.sun.star.uno.RuntimeException {
try {
_socket.close();
} catch(IOException ioException) {
com.sun.star.io.IOException unoIOException = new com.sun.star.io.IOException(ioException);
notifyListeners_error(unoIOException);
throw unoIOException;
}
if (DEBUG) System.err.println("##### " + getClass().getName() + " - socket closed");
notifyListeners_close();
}
/**
* Gives a description of the connection.
*
* @return the description.
* @see com.sun.star.connection.XConnection#getDescription
*/
public String getDescription() throws com.sun.star.uno.RuntimeException {
return _description;
}
}
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