/* * @(#)NullDriver.java	1.12 98/06/25 SMI * * Copyright (c) 1998 Sun Microsystems, Inc. All Rights Reserved. * * Sun grants you ("Licensee") a non-exclusive, royalty free, license  * to use, modify and redistribute this software in source and binary * code form, provided that i) this copyright notice and license appear * on all copies of the software; and ii) Licensee does not utilize the * software in a manner which is disparaging to Sun. * * This software is provided "AS IS," without a warranty of any kind. * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A * PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN AND * ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY * LICENSEE AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THE * SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS * BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT, * INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, * HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, ARISING * OUT OF THE USE OF OR INABILITY TO USE SOFTWARE, EVEN IF SUN HAS BEEN * ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. * * This software is not designed or intended for use in on-line control * of aircraft, air traffic, aircraft navigation or aircraft * communications; or in the design, construction, operation or * maintenance of any nuclear facility. Licensee represents and * warrants that it will not use or redistribute the Software for such * purposes. */package samples.NullDriver;import	java.net.*;import	java.io.*;import	java.util.*;import	javax.comm.*;public class NullDriver implements CommDriver {    /*     * initialize() will be called by the CommPortIdentifier's static     * initializer. The responsibility of this method is:     * 1) Ensure that that the hardware is present.     * 2) Load any required native libraries.     * 3) Register the port names with the CommPortIdentifier.     */    public void initialize() {	/*	 * Do native initialization here.	 * This may include loading any native shared libraries necessary.	 */	/* Register port names with CommPortIdentifier */	CommPortIdentifier.addPortName("SerialPort1",				CommPortIdentifier.PORT_SERIAL, this);	CommPortIdentifier.addPortName("SerialPort2",				CommPortIdentifier.PORT_SERIAL, this);    }    /*     * getCommPort() will be called by CommPortIdentifier from its open()     * method. portName is a string that was registered earlier using the     * CommPortIdentifier.addPortName() method. getCommPort() returns an     * object that extends either SerialPort or ParallelPort.     */    public CommPort getCommPort(String portName, int portType) {	CommPort port = null;	try {	    switch (portType) {	    case CommPortIdentifier.PORT_SERIAL:		port = (CommPort) new NullSerialPort(portName);		break;	    case CommPortIdentifier.PORT_PARALLEL:		break;	    }	} catch (IOException ex) {	    /*	     * We failed to construct the port object.	     * Most likely the port is owned by another application.	     */	}	return port;    }}