/*
* @(#)Receiver.java 1.1 98/06/02 SMI
*
* Author: Tom Corson
*
* 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.
*/
import java.io.IOException;
import java.lang.Character;
import java.awt.Panel;
import java.awt.TextArea;
import java.awt.BorderLayout;
import javax.comm.ParallelPort;
public class Receiver extends Panel implements Runnable
{
private TextArea text;
private ReceiveOptions options;
private ByteStatistics counter;
private ParallelPortDisplay owner;
private byte[] buffer;
private int textCount;
private int delay;
public Receiver(ParallelPortDisplay owner,
int rows,
int cols)
{
super();
this.owner = owner;
this.buffer = new byte[2048];
this.setLayout(new BorderLayout());
this.options = new ReceiveOptions(owner.port);
this.add("North", this.options);
this.counter = new ByteStatistics("Bytes Received", 10,
owner.port, true);
this.add("South", this.counter);
this.text = new TextArea(rows, cols);
this.add("Center", text);
this.textCount = 0;
this.delay = 0;
}
public Receiver(ParallelPortDisplay owner,
int rows,
int cols,
int delay)
{
this(owner, rows, cols);
this.delay = delay;
}
public void setPort(ParallelPort port)
{
this.counter.setPort(port);
this.options.setPort(port);
}
public void showValues()
{
this.options.showValues();
this.counter.showValues();
}
public void clearValues()
{
this.text.setText("");
this.counter.clearValues();
this.options.clearValues();
}
public void setBitsPerCharacter(int val)
{
this.counter.setBitsPerCharacter(val);
}
public void run()
{
while (this.owner.open)
{
try
{
synchronized (this) {
wait(10000);
}
}
catch (InterruptedException e)
{
}
if (this.owner.ctlSigs.DA)
{
this.readData();
}
}
}
private String displayText(byte[] bytes,
int byteCount)
{
String str;
int i,
idx;
byte[] nb;
/* Don't let the text area get too big! */
if (this.textCount > 5000)
{
this.text.setText("");
this.textCount = 0;
}
nb = new byte[byteCount * 4];
for (i = 0, idx = 0; i < byteCount; i++)
{
/* Wrap any control characters */
if (Character.isISOControl((char) bytes[i])
&& !Character.isWhitespace((char) bytes[i]))
{
nb[idx++] = '<';
nb[idx++] = '^';
nb[idx++] = (byte) (bytes[i] + 64);
nb[idx++] = '>';
}
else
{
nb[idx++] = bytes[i];
}
}
str = new String(nb, 0, idx);
this.text.append(str);
this.counter.incrementValue((long) byteCount);
this.textCount += byteCount;
return(str);
}
public void readData()
{
String str;
int bytes;
long endTime,
now;
try
{
while (this.owner.open
&& (this.owner.in.available() > 0 ))
{
bytes = this.owner.in.read(this.buffer);
if (bytes > 0)
{
if (bytes > this.buffer.length)
{
System.out.println(owner.port.getName()
+ ": Input buffer overflow!");
}
str = this.displayText(this.buffer, bytes);
if (this.owner.lineMonitor)
{
this.owner.transmitter.sendString(str);
}
}
if (this.delay > 0)
{
endTime = System.currentTimeMillis()
+ (long) delay;
now = 0;
while (now < endTime)
{
try
{
Thread.sleep(delay);
}
catch (InterruptedException e)
{
}
now =
System.currentTimeMillis();
}
}
}
owner.ctlSigs.DA = false;
owner.ctlSigs.showErrorValues();
}
catch (IOException ex)
{
System.out.println(owner.port.getName()
+ ": Cannot read input stream");
}
}
}