streamhost.java

JBother是纯Java开发的Jabber(即时消息开源软件)客户端。支持群组聊天

/**
 * $RCSfile$
 * $Revision: 2495 $
 * $Date: 2005-05-30 10:14:25 -0500 (Mon, 30 May 2005) $
 *
 * Copyright 2003-2004 Jive Software.
 *
 * All rights reserved. Licensed 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
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.jivesoftware.smackx.packet;

import org.jivesoftware.smack.packet.IQ;
import org.jivesoftware.smack.provider.IQProvider;
import org.jivesoftware.smackx.provider.DataFormProvider;
import org.xmlpull.v1.XmlPullParser;
import java.util.*;

import java.net.*;
import java.io.IOException;
import java.nio.channels.SocketChannel;
import java.nio.channels.FileChannel;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;


/**
 * Represents information contained in <streamhost> message.
 *@author     Lukasz Wiechec
 */
public class StreamHost extends IQ {
    
    private static final String NAMESPACE = "http://jabber.org/protocol/bytestreams";
    
    private ArrayList hosts = new ArrayList();

    private String sid;
    
    /**
     * Creates a streamhost with the specified session id
     *@param aSId a session id for this transfer
     */
    public StreamHost(String aSId) {
        setType(Type.SET);
        sid = aSId;
    }
     
    /**
     * Gets the session id for this transfer
     *@return the session id
     */
    public String getSid() {
        return sid;
    }
    
    /**
     * Sets the session id for this transfer
     *@param aSId   the sesssion id
     */
    public void setSid(String aSId) {
        sid = aSId;
    }
    
    /**
     * Adds a new host to this packet
     *@param host the new host
     */
    public synchronized void addHost(Host host) {
        hosts.add(host);
    }
    
    /**
     * Returns all the hosts contained in this packet
     *@return the hosts
     */
    public synchronized ArrayList getHosts() { return hosts; }
    
    /**
     * Removes a host from this packet
     *@param host   The host to remove
     */
    public synchronized void removeHost(Host host)
    {
        int index = hosts.indexOf(host);
        if(index != -1) hosts.remove(index);
    }
    
    /**
     * Returns the XML representation of this packet
     *@return   the xml representation
    */
    public String getChildElementXML() {
        StringBuffer buf = new StringBuffer();
        buf.append("<query xmlns=\"").append(NAMESPACE).append("\" sid=\"")
            .append(sid).append("\">");
        
        for(int i = 0; i < hosts.size(); i++)
        {
            Host host = (Host)hosts.get(i);
            String hostname = host.getHost();
            String jid = host.getJid();
            int port = host.getPort();
            
            if (hostname != null && port != -1 && jid != null) {
                buf.append("<streamhost port=\"").append(port)
                    .append("\" host=\"").append(hostname)
                    .append("\" jid=\"").append(jid).append("\"/>");
            }
        }
        buf.append("</query>");
        return buf.toString();
    }
    
    /**
     * Returns a specific Host for a jid
     *@return the host, or <tt>null</tt> if it cannot be found
     */
    public Host getHostFor(String jid)
    {
        for(int i = 0; i < hosts.size(); i++)
        {
            Host host = (Host)hosts.get(i);
            if(host.getJid().equals(jid)) return host;
        }
        
        return null;
    }
    
    /**
     * Representation of a Host
    */
    public static class Host
    {
        String host;
        String jid;
        int port;
        
        /**
         * Creates a host object
         *@param host   the address of the host
         *@param jid    the JID of the host
         *@param port   the port of the host
        */        
        public Host(String host, String jid, int port)
        {
            this.host = host;
            this.jid = jid;
            this.port = port;
        }
        
        /**
         * @return the address of the host
        */
        public String getHost() { return host; }
        
        /**
         * @return the JID of the host
        */
        public String getJid() { return jid; }
        
        /**
         * @return the port of the host
        */
        public int getPort() { return port; }
    }
    
}