/**
* Handles the given {@link ProcessEvent}. After finding the corresponding Item (by iterating
* through all known group addresses) this Item is updated. Each item is added to a special list
* to identify and avoid echo's in the <code>receiveUpdate</code> and <code>receiveCommand</code>
* methods.
*
* @param e the {@link ProcessEvent} to handle.
*/
private void readFromKNX(ProcessEvent e) {
try {
GroupAddress destination = e.getDestination();
byte[] asdu = e.getASDU();
if (asdu.length == 0) {
return;
}
String[] itemList = getItemNames(destination);
if (itemList.length == 0) {
logger.debug("Received telegram for unknown group address {}", destination.toString());
}
for (String itemName : itemList) {
Iterable<Datapoint> datapoints = getDatapoints(itemName, destination);
if (datapoints != null) {
for (Datapoint datapoint : datapoints) {
Type type = getType(datapoint, asdu);
if (type != null) {
// we need to make sure that we won't send out this event to
// the knx bus again, when receiving it on the openHAB bus
ignoreEventList.add(itemName + type.toString());
logger.trace(
"Added event (item='{}', type='{}') to the ignore event list",
itemName,
type.toString());
if (type instanceof Command && isCommandGA(destination)) {
eventPublisher.postCommand(itemName, (Command) type);
} else if (type instanceof State) {
eventPublisher.postUpdate(itemName, (State) type);
} else {
throw new IllegalClassException(
"Cannot process datapoint of type " + type.toString());
}
logger.trace(
"Processed event (item='{}', type='{}', destination='{}')",
itemName,
type.toString(),
destination.toString());
} else {
final char[] hexCode = "0123456789ABCDEF".toCharArray();
StringBuilder sb = new StringBuilder(2 + asdu.length * 2);
sb.append("0x");
for (byte b : asdu) {
sb.append(hexCode[(b >> 4) & 0xF]);
sb.append(hexCode[(b & 0xF)]);
}
logger.debug(
"Ignoring KNX bus data: couldn't transform to an openHAB type (not supported). Destination='{}', datapoint='{}', data='{}'",
new Object[] {destination.toString(), datapoint.toString(), sb.toString()});
}
}
}
}
} catch (RuntimeException re) {
logger.error("Error while receiving event from KNX bus: " + re.toString());
}
}
