001package jmri.jmrix.xpa; 002 003/** 004 * Define interface for sending and receiving messages from an XpressNet System 005 * using an XPA and a modem. 006 * 007 * @author Paul Bender Copyright (C) 2004 008 */ 009public interface XpaInterface { 010 011 void addXpaListener(XpaListener l); 012 013 void removeXpaListener(XpaListener l); 014 015 /** 016 * Test operational status of interface. 017 * 018 * @return true if the interface implementation is operational. 019 */ 020 boolean status(); 021 022 /** 023 * Send a message through the interface. 024 * 025 * @param m Message to be sent. 026 * @param l Listener to be notified of reply. 027 */ 028 void sendXpaMessage(XpaMessage m, XpaListener l); 029}