ibbchunk.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

/*
 * IBBChunk.java
 *
 * Created on October 4, 2005, 8:36 PM
 *
 * To change this template, choose Tools | Template Manager
 * and open the template in the editor.
 */

package org.jivesoftware.smackx.packet;

import org.jivesoftware.smack.packet.*;

/**
 * IBB Data packet
 * <br>
 * See <a href="http://www.jabber.org/jeps/jep-0047.html">JEP 047</a>
 * @author synic
 */
public class IBBChunk implements PacketExtension {
    private String sid = "";
    private int seq = 0;
    private String data = "";
    
    /**
     * Returns the namespace for this packet extension
     *
     * @return the "data" namespace
     */
    public String getElementName() { return "data"; }
    
    /**
     * Returns the namespace for this packet extension
     *
     * @return "http://jabber.org/protocol/ibb"
     */
    public String getNamespace() { return "http://jabber.org/protocol/ibb"; }
    
    /**
     * Sets the session id for this packet
     *@param id The new session id for this packet
     */
    public void setSid(String id) { sid = id; }
    
    /**
     * Returns the session id for this packet
     *
     * @return The session ID for this packet
     */
    public String getSid() { return sid; }
    
    /**
     * Returns the Base64 encoded data contained in this packet
     * @return Base64 encoded data
     */
    public String getData() { return data; }
    
    /**
     * Sets the data to be sent with this packet
     *
     *@param data   A base64 encoded String representation of the data you want to send
     */
    public void setData(String data) { this.data = data; }
    
    /**
     * Sets the sequence number for this packet.
     * Valid numbers are a range between 0 and 65535
     *
     *@param seq    The sequence number of this packet
     *@throws IllegalArgumentException when trying to set an invalid sequence number
     */
    public void setSeq(int seq) throws IllegalArgumentException {
        if(seq < 0 || seq > 65535) {
            throw new IllegalArgumentException(
            "Valid sequence range is between 0 and 65535"
            );
        }
        this.seq = seq;
    }
    
    /**
     * Returns the sequence number for this packet
     *
     *@return the sequence number for this packet
     */
    public int getSeq() { return seq; }
    
    /**
     * Returns the XML representation of this packet
     *
     *@return the XML representation of this packet
     */
    public String toXML() {
        StringBuffer buff = new StringBuffer();
        buff.append("<data xmlns='http://jabber.org/protocol/ibb' ")
        .append("sid='").append(sid).append("' ").append("seq='").append(seq)
        .append("'>").append(data).append("</data>\n")
        .append("<amp xmlns='http://jabber.org/protocol/amp'>\n")
        .append("<rule condition='deliver-at' value='stored' action='error' />\n")
        .append("<rule condition='match-resource' value='exact' action='error' />\n")
        .append("</amp>");
        
        return buff.toString();
    }
    
}