irlapstatequery.java

JRed is a 100％ Java implementation of the IrDA infrared communications protocols. JRed lets you beam

/*
**************************************************************************
** $Header: /cvsroot/jred/jred/src/com/synchrona/jred/irlap/IrLAPStateQuery.java,v 1.2 2000/07/30 20:18:12 mpatters Exp $
**
** Copyright (C) 2000 Synchrona, Inc. All rights reserved.
**
** This file is part of JRed, a 100% Java implementation of the IrDA
** infrared communications protocols.
**
** This file may be distributed under the terms of the Synchrona Public
** License as defined by Synchrona, Inc. and appearing in the file
** LICENSE included in the packaging of this file. The Synchrona Public
** License is based on the Q Public License as defined by Troll Tech AS
** of Norway; it differs only in its use of the courts of Florida, USA
** rather than those of Oslo, Norway.
**************************************************************************
*/
package com.synchrona.jred.irlap;

import com.synchrona.util.Assert;
import com.synchrona.util.Log;
import java.io.PrintWriter;

class IrLAPStateQuery extends IrLAPState {
	private Log _log;

	//--------------------------------------------------------------------
	// Static stuff
	//--------------------------------------------------------------------

	// You'll want to do this in each subclass of IrLAPState to 
	// create a single instance of that subclass.
	private static IrLAPState s_instance = new IrLAPStateQuery();

	// Will late binding make sure we get the correct instance? Need
	// to test this (see IrLAPStateNDM). It may be compiler-dependent.
	public static IrLAPState getInstance() {
		return s_instance;
	}

	public void handleSlotTimerExpired(IrLAPContext context) throws Exception {
		logIfEnabled("slot-timer-expired");

		if ( context.getSlotCount() < 6 ) {
			context.setSlotCount((byte) (context.getSlotCount() + 1));	
		} else {
			context.setSlotCount((byte) 0xFF);
			context.setMediaBusy(false);
			context.nextState(IrLAPStateNDM.getInstance());
		}
		context.sendDiscoveryRequest();
		context.startSlotTimer();
	}

	public void handleXID(IrLAPContext context, int nSource, int nDestination, byte ySlot, boolean bCommand, byte [] ayHints) throws Exception {
		Assert.fail(null != context, "IrLAPContext is null.");
		Assert.fail(null != ayHints, "Service hints are null.");

		logIfEnabled("XID (empty) [source=" + nSource
			+ " destination=" + nDestination
			+ " slot=" + ySlot
			+ " command?=" + bCommand + "]");

		System.err.println("(IrLAPStateQuery.handleXID) creating service hints");
		ServiceHints hints = new ServiceHints(ayHints, 0, ayHints.length);

		System.err.println("(IrLAPStateQuery.handleXID) creating discovery info");
		DiscoveryInformation discoveryInfo = new DiscoveryInformation(nSource, hints);

		System.err.println("(IrLAPStateQuery.handleXID) sending discoveryIndication");
		context.discoveryIndication(discoveryInfo);
		System.err.println("(IrLAPStateQuery.handleXID) finished sending discoveryIndication");
	}

	//--------------------------------------------------------------------
	// End of event handlers, start of support stuff
	//--------------------------------------------------------------------

	public void debug(String strCategory, String strMessage) {
		_log.debug(strCategory, strMessage);
	}

	public void setLog(Log log) {
		_log = log;
	}

	public void setLog(PrintWriter log) {
	}

	public void setLogging(boolean bDoLogging) {
	}

	//--------------------------------------------------------------------
	// End of public methods, start protected methdods
	//--------------------------------------------------------------------

	protected void logIfEnabled(String strMessage) throws Exception {
	}

	//--------------------------------------------------------------------
	// End of protected methods, start private methods
	//--------------------------------------------------------------------

	protected IrLAPStateQuery() {
		_log = null;
	}

}