datalink.java

java开发的netbeans插件中的application原型

/*
 * DataLink.java
 *
 * Created on 2006年12月10日, 下午2:12
 *
 * To change this template, choose Tools | Template Manager
 * and open the template in the editor.
 */

package cn.edu.tsinghua.thss.talkie.connect;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.UnknownHostException;

/**
 *
 * @author promenade
 */
public class DataLink {
    
    /** Creates a new instance of DataLink */
    
    String ipAddr = null;
    Socket outSock = null;
    ServerSocket inServSock = null;
    Socket inSock = null;
    
    int DATA_PORT = 5002;
    
    public DataLink(String inIP) {
        ipAddr = inIP;
    }
    
    public boolean open() throws IOException, UnknownHostException {
        if (ipAddr != null){
            outSock = new Socket(ipAddr,DATA_PORT);
        }    
        return outSock.isConnected();
    }
    
    void listen() throws IOException {
        inServSock = new ServerSocket(DATA_PORT);
        inSock = inServSock.accept();
    }
    
    public InputStream getInputStream()throws IOException {
        if (inSock != null)
            return inSock.getInputStream();
        else
            return null;
    }
    
    public OutputStream getOutputStream() throws IOException {
        if (outSock != null)
            return outSock.getOutputStream();
        else
            return null;
    }
    
    void close() throws IOException {
        inSock.close();
        outSock.close();
    }
}