root / import / ext3D / trunk / install-extension3d / IzPack / src / lib / com / izforge / izpack / util / PortProcessor.java @ 15280
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/*
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* Copyright (C) 2004 Thorsten Kamann
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*
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* File : PortProcessor.java
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* Description : Arises the port until it is free
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* Author's email : thorsten.kamann@planetes.de
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* Author's Website : http://www.izforge.com
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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package com.izforge.izpack.util; |
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import java.net.InetAddress; |
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import java.net.ServerSocket; |
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import com.izforge.izpack.panels.ProcessingClient; |
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import com.izforge.izpack.panels.Processor; |
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/**
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* Checks whether the value of the field comtemt is a port and is free. If
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* false the next free port will be searched.
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* @author Thorsten Kamann <thorsten.kamann@planetes.de>
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*/
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public class PortProcessor implements Processor { |
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public String process (ProcessingClient client){ |
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String retValue = ""; |
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String host = "localhost"; |
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int port = 0; |
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int oPort = 0; |
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boolean found = false; |
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InetAddress inet = null; |
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ServerSocket socket = null; |
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try{
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if (client.getNumFields()>1){ |
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host = client.getFieldContents(0);
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oPort = Integer.parseInt(client.getFieldContents(1)); |
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}else{
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oPort = Integer.parseInt(client.getFieldContents(0)); |
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} |
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}catch (Exception ex){ |
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return getReturnValue(client, null, null); |
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} |
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port = oPort; |
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while (!found){
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try{
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inet = InetAddress.getByName(host);
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socket = new ServerSocket(port, 0, inet); |
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if (socket.getLocalPort() > 0){ |
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found = true;
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retValue = getReturnValue(client, null, String.valueOf(port)); |
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}else{
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port++; |
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} |
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}catch (java.net.BindException ex){
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port++; |
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}catch (Exception ex){ |
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return getReturnValue(client, null, null); |
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}finally{
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try{
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socket.close(); |
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}catch (Exception ex){} |
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} |
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} |
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return retValue;
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} |
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/**
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* Creates the return value
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* @param client The ProcessingClient
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*/
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private String getReturnValue(ProcessingClient client, String host, String port){ |
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String retValue = ""; |
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String _host = ""; |
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String _port = ""; |
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if (client.getNumFields()>1){ |
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_host = (host == null)? client.getFieldContents(0): host; |
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_port = (port == null)? client.getFieldContents(1): port; |
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retValue = _host+"*"+_port;
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}else{
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_port = (port == null)? client.getFieldContents(0): port; |
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retValue = _port; |
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} |
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return retValue;
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} |
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} |