simplequerytask.java

主要是对串口驱动的的一些控制源码！！！ 在下载javacomm20-win32.zip后就可以使用。

/**
 * $Log: SimpleQueryTask.java,v $
 * Revision 1.6  2003/03/12 14:58:45  willaxt
 * adjusted to new exception handling of communication exceptions
 *
 * Revision 1.5  2003/02/08 16:43:03  mwulff
 * organized imports
 *
 * Revision 1.4  2003/01/30 10:39:47  mwulff
 * adapted to changed class JKFView
 *
 * Revision 1.3  2003/01/16 15:57:10  mwulff
 * implemented method handleException(Exception) from super class
 *
 * Revision 1.2  2003/01/16 15:44:47  mwulff
 * adjusted constructors to changed constructor in super class CommunicationTask
 *
 * Revision 1.1  2003/01/16 13:07:32  mwulff
 * initial version
 *
 * Revision 1.1  2002/12/31 12:22:43  mwulff
 * no message
 *
 */
package de.fhm.jkf.test.cl;

import javax.swing.JTextArea;

import de.fhm.jkf.comm.cl.JKFFactory;
import de.fhm.jkf.comm.cl.ObjectFactory;
import de.fhm.jkf.comm.clsv.RemoteObjectCreationException;
import de.fhm.jkf.gui.CommunicationTask;
import de.fhm.jkf.gui.JKFView;
import de.fhm.jkf.test.clsv.TimeReceiver;

/**
 * <br><br><center><table border="1" width="80%"><hr>
 * <strong><a href="http://jkf.sourceforge.net">The JKF Project</a></strong>
 * <p>
 * Copyright (C) 2002 by Marten Wulff
 * <p>
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 * <p>
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 * <p>
 * You should have received a copy of the <a href="http://www.gnu.org/copyleft/lesser.html">
 * GNU Lesser General Public License</a> along with this library; if not, write to
 * the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA  02111-1307  USA
 * <hr></table></center>
 * 
 * @author		marten wulff
 * @version 	1.0
 */
public class SimpleQueryTask extends CommunicationTask {

	private JTextArea display = null;
	String result = null;
	
	
	/**
	 * Constructor for SimpleQueryTask.
	 */
	public SimpleQueryTask(JTextArea display, JKFView panel) {
		super(panel);
		
		this.display = display;
	}

	/* (non-Javadoc)
	 * @see foo.CommunicationTask#doPresentation()
	 */
	public void doPresentation() {
		display.append(result + "\n");
	}
	
	public void interrupt() {
		System.out.println(this.getClass().getName() + ".interrupted() called");
		// do nothing at moment
	}

	/* (non-Javadoc)
	 * @see foo.CommunicationTask#doQuery()
	 */
	public void doQuery() {
		
		try {
			ObjectFactory factory = JKFFactory.instance().getFactory();
			TimeReceiver time =
				(TimeReceiver) factory.createObject(
					TimeReceiver.class,
					"de.fhm.jkf.test.sv.TimeReceiverImpl",
					null);
			
			result = time.getTime().toString();			
		} catch (RemoteObjectCreationException roce) {
			result = roce.getMessage();
		}
	}	
}