public ChartInfo() {
byteArrayOutputStream = new ByteArrayOutputStream(64 * 1024); // Grows
// as
// needed
byteArrayOutputStream.reset();
dataCollectionForTheChart = new TimeSeriesCollection();
rowData = "";
}
/**
* Plots the chart and sends it in the form of ByteArrayOutputStream to outside.
*
* @return Returns the byteArrayOutputStream.
*/
public synchronized ByteArrayOutputStream writePlot() {
if (!changed) return byteArrayOutputStream;
byteArrayOutputStream.reset();
try {
ChartUtilities.writeChartAsPNG(byteArrayOutputStream, chart, width, height, false, 8);
} catch (IOException e) {
logger.warn(e.getMessage(), e);
}
return byteArrayOutputStream;
}
public void dataAvailable(String inputStreamName, StreamElement data) {
if (inputStreamName.equalsIgnoreCase("SSTREAM")) {
String action = (String) data.getData("STATUS");
/** */
String moteId = (String) data.getData("ID");
if (moteId.toLowerCase().indexOf("mica") < 0) return;
if (action.toLowerCase().indexOf("add") >= 0) counter++;
if (action.toLowerCase().indexOf("remove") >= 0) counter--;
}
if (inputStreamName.equalsIgnoreCase("CSTREAM")) {
BufferedImage bufferedImage = null;
outputStream.reset();
byte[] rawData = (byte[]) data.getData("IMAGE");
input = new ByteArrayInputStream(rawData);
try {
bufferedImage = ImageIO.read(input);
} catch (IOException e) {
e.printStackTrace();
}
Graphics2D graphics = (Graphics2D) bufferedImage.getGraphics();
int size = 30;
int locX = 0;
int locY = 0;
if (counter < 0) counter = 0;
switch (counter) {
case 0:
graphics.setColor(Color.RED);
break;
case 1:
graphics.setColor(Color.ORANGE);
break;
case 2:
graphics.setColor(Color.YELLOW);
break;
case 3:
graphics.setColor(Color.GREEN);
break;
default:
logger.warn(
new StringBuilder()
.append("Shouldn't happen.>")
.append(counter)
.append("<")
.toString());
}
graphics.fillOval(locX, locY, size, size);
try {
ImageIO.write(bufferedImage, "jpeg", outputStream);
outputStream.close();
} catch (Exception e) {
logger.error(e.getMessage(), e);
}
StreamElement outputSE =
new StreamElement(
OUTPUT_FIELDS,
OUTPUT_TYPES,
new Serializable[] {outputStream.toByteArray()},
data.getTimeStamp());
dataProduced(outputSE);
}
if (logger.isInfoEnabled())
logger.info(
new StringBuilder()
.append("Data received under the name: ")
.append(inputStreamName)
.toString());
}