RS232Handler.java

/*
  RS232Handler.java

  (c) 2014 Ed Swartz

  All rights reserved. This program and the accompanying materials
  are made available under the terms of the Eclipse Public License v1.0
  which accompanies this distribution, and is available at
  http://www.eclipse.org/legal/epl-v10.html
 */
package v9t9.engine.dsr.rs232;

import org.apache.log4j.Logger;

import v9t9.common.dsr.IOBuffer;
import v9t9.common.dsr.IRS232Handler;
import v9t9.common.dsr.IRS232Listener;
import ejs.base.utils.ListenerList;
import ejs.base.utils.TextUtils;
import ejs.base.utils.ListenerList.IFire;

/**
 * This handles 
 * @author ejs
 *
 */
public class RS232Handler implements IRS232Handler {
	private static Logger log = Logger.getLogger(RS232Handler.class);

	private DataSize dataSize;
	private Parity parity;
	private Stop stop;
	
	private ListenerList<IRS232Listener> listeners = new ListenerList<IRS232Listener>();
	
	/* (non-Javadoc)
	 * @see v9t9.common.dsr.IRS232Handler#addListener(v9t9.common.dsr.IRS232Handler.IRS232Listener)
	 */
	@Override
	public void addListener(IRS232Listener listener) {
		listeners.add(listener);
	}
	/* (non-Javadoc)
	 * @see v9t9.common.dsr.IRS232Handler#removeListener(v9t9.common.dsr.IRS232Handler.IRS232Listener)
	 */
	@Override
	public void removeListener(IRS232Listener listener) {
		listeners.remove(listener);		
	}
	
	/* (non-Javadoc)
	 * @see v9t9.common.dsr.IRS232Handler#updateControl(v9t9.common.dsr.IRS232Handler.DataSize, v9t9.common.dsr.IRS232Handler.Parity, v9t9.common.dsr.IRS232Handler.Stop)
	 */
	@Override
	public void updateControl(DataSize dataSize, Parity parity, Stop stop) {
		// ignore unless changing
		if (this.dataSize != dataSize || this.parity != parity || this.stop != stop) {
			this.dataSize = dataSize;
			this.parity = parity;
			this.stop = stop;

			listeners.fire(new IFire<IRS232Listener>() {

				@Override
				public void fire(IRS232Listener listener) {
					listener.updatedControl(
							RS232Handler.this.dataSize, 
							RS232Handler.this.parity, 
							RS232Handler.this.stop);
				}
			});
		}
	}
	
	/* (non-Javadoc)
	 * @see v9t9.common.dsr.IRS232Handler#setTransmitRate(int)
	 */
	@Override
	public void setTransmitRate(final int bps) {
		listeners.fire(new IFire<IRS232Listener>() {

			@Override
			public void fire(IRS232Listener listener) {
				listener.transmitRateSet(bps);
			}
		});
	}

	/* (non-Javadoc)
	 * @see v9t9.common.dsr.IRS232Handler#setReceiveRate(int)
	 */
	@Override
	public void setReceiveRate(final int bps) {
		listeners.fire(new IFire<IRS232Listener>() {

			@Override
			public void fire(IRS232Listener listener) {
				listener.receiveRateSet(bps);
			}
		});
	}

	/* (non-Javadoc)
	 * @see v9t9.common.dsr.IRS232Handler#transmitChars(v9t9.common.dsr.IRS232Handler.IOBuffer)
	 */
	@Override
	public void transmitChars(final IOBuffer buf) {
		final byte[] buffer = buf.takeAll();
		if (buffer.length == 0)
			return;
		
		try {
			log.debug("RS232Handler::transmitChars: " + new String(buffer));
		} catch (Throwable t) {
			log.debug("RS232Handler::transmitChars: #" + buffer.length);
		}
		log.debug("RS232Handler::listeners: " + TextUtils.catenateStrings(listeners.toArray(), ","));

		
		listeners.fire(new IFire<IRS232Listener>() {

			@Override
			public void fire(IRS232Listener listener) {
				listener.charsTransmitted(buffer);
			}
		});
	}

}