How to use

exists

method

in

org.ogema.core.model.simple.FloatResource

conn.registerControlledResource(weatherChannel, reading.getParent());
if (!reading.exists()) {
  reading.create();
  reading.getParent().activate(true);

conn.registerControlledResource(weatherChannel, reading.getParent());
if (!reading.exists()) {
  reading.create();
  reading.getParent().activate(true);

if (!reading.exists()) {
  reading.create();
  thermos.activate(true);
if (!reading.exists()) {
  reading.create();
  thermos.activate(true);

final Float value = (resource.exists()) ? resource.getValue() : null;
final RwPair<Float> pair = m_floatMap.get(path);
pair.read = value;

if (!reading.exists()) {
  reading.create();
  thermos.activate(true);
if (!reading.exists()) {
  reading.create();
  thermos.activate(true);

@Override
public void onPOSTComplete(String data, OgemaHttpRequest req) {
  FloatResource source = getResource(sva, req, FloatResource.class);
  String val = myField.getValue(req);
  float value;
  try {
    value  = Float.parseFloat(val);
  } catch (NumberFormatException | NullPointerException e) {
    if(alert != null) alert.showAlert(notAllowedMessageUsed, false, req);
    return;
  }
  if (value < minimumAllowed) {
    if(alert != null) alert.showAlert(notAllowedMessageUsed, false, req);
    return;
  }
  if (value > maximumAllowed) {
    if(alert != null) alert.showAlert(notAllowedMessageUsed, false, req);
    return;
  }
  if(!source.exists()) {
    source.create();
    setValue(source, value);
    source.activate(true);
  } else {
    setValue(source, value);
  }
  if(alert != null) alert.showAlert("New value: " + value, true, req);
}

final RwPair<Float> pair = m_floatMap.get(path);
final Float value = pair.write;
if (!resource.exists()) {
  pair.read = null;
} else if (value == null) {