/*** * This method is invoked by a ProtocolCommandEvent source after * sending a protocol command to a server. * * @param event The ProtocolCommandEvent fired. ***/ public void protocolCommandSent(ProtocolCommandEvent event); /*** * This method is invoked by a ProtocolCommandEvent source after * receiving a reply from a server. * * @param event The ProtocolCommandEvent fired. ***/ public void protocolReplyReceived(ProtocolCommandEvent event); } 本文的最后一个文件是ProtocolCommandEvent.java。这个文件包含了一个EventObject 类中的叫做ProtocolCommandEvent的子集。EventObject的子集用于通过从event producer到event listeners的事件数据。ProtocolCommandEvent 类增加了一个定义在EventObject中的getSource()方法，创建了creates the getMessage(), isReply(), isCommand(), getReplyCode() and getCommand()方法。这些方法只能返回给类一个只读字段，只能在构造函数中设置。 ProtocolCommandEvent.java public class ProtocolCommandEvent extends EventObject { private int __replyCode; private boolean __isCommand; private String __message, __command; public ProtocolCommandEvent(Object source, String command, String message) { super(source); __replyCode = 0; __message = message; __isCommand = true; __command = command; } public ProtocolCommandEvent(Object source, int replyCode, String message) { super(source); __replyCode = replyCode; __message = message; __isCommand = false; __command = null; } public String getCommand() { return __command; } public int getReplyCode() { return __replyCode; } public boolean isCommand() { return __isCommand; } public boolean isReply() { return !isCommand(); } public String getMessage() { return __message; } }
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