?? sendpackstatelist.java
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/* * 創建日期 2004-9-18 * * */package com.ll.smsbeans;import java.util.Collection;import java.util.HashMap;import com.ll.smsbeans.cmpp3.CmppPacket;/** * 記錄當前發送包狀態的列表。 * @author listlike <a href="mailto:listlike@hotmail.com"> * <i><listlike@hotmail.com></i></a> */public class SendPackStateList{ private HashMap map; /** * Holds singleton instance */ private static SendPackStateList instance; /** * */ private SendPackStateList() { super(); map = new HashMap(); } /** * */ synchronized public void clear() { map.clear(); } /** * @param packet * @return */ synchronized public SendPacketState get(Packet packet) { if (packet instanceof CmppPacket) { CmppPacket cp = (CmppPacket) packet; return (SendPacketState) map.get(new Integer(cp.getSequenceId())); } else return null; } /** * @return */ synchronized public boolean isEmpty() { return map.isEmpty(); } /** * @param key * @return */ synchronized public SendPacketState remove(Packet value) { if (value instanceof CmppPacket) { CmppPacket cp = (CmppPacket) value; return (SendPacketState) map.remove( new Integer(cp.getSequenceId())); } else return null; } synchronized public SendPacketState add(Packet value) { if (value instanceof CmppPacket) { CmppPacket cp = (CmppPacket) value; return (SendPacketState) map.put( new Integer(cp.getSequenceId()), new SendPacketState(value)); } else return null; } /** * @return */ synchronized public int size() { return map.size(); } /** * @return */ synchronized public Collection values() { return map.values(); } /** * Returns the singleton instance. @return the singleton instance */ static public SendPackStateList getInstance() { if (instance == null) { instance = new SendPackStateList(); } return instance; }}?? 快捷鍵說明
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