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Fix NPE when reading reply from device (#12956)

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Signed-off-by: Mark Hilbush <mark@hilbush.com>
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Mark Hilbush 2022-06-18 15:00:01 -04:00 committed by GitHub
parent b2087e3807
commit 4182595c19
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1 changed files with 6 additions and 13 deletions
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19
bundles/org.openhab.binding.globalcache/src/main/java/org/openhab/binding/globalcache/internal/handler/GlobalCacheHandler.java
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@ -130,11 +130,6 @@ public class GlobalCacheHandler extends BaseThingHandler {
@Override
public void handleCommand(ChannelUID channelUID, Command command) {
if (command == null) {
logger.warn("Command passed to handler for thing {} is null", thingID());
return;
}
// Don't try to send command if the device is not online
if (!isOnline()) {
logger.debug("Can't handle command {} because handler for thing {} is not ONLINE", command, thingID());
@ -538,12 +533,10 @@ public class GlobalCacheHandler extends BaseThingHandler {
*/
private void writeCommandToDevice(RequestMessage requestMessage) throws IOException {
logger.trace("Processor for thing {} writing command to device", thingID());
if (connectionManager.getCommandOut() == null) {
logger.debug("Error writing to device because output stream object is null");
return;
}
byte[] deviceCommand = (requestMessage.getDeviceCommand() + '\r').getBytes();
connectionManager.getCommandOut().write(deviceCommand);
connectionManager.getCommandOut().flush();
@ -554,14 +547,16 @@ public class GlobalCacheHandler extends BaseThingHandler {
*/
private String readReplyFromDevice(RequestMessage requestMessage) throws IOException {
logger.trace("Processor for thing {} reading reply from device", thingID());
if (connectionManager.getCommandIn() == null) {
logger.debug("Error reading from device because input stream object is null");
return "ERROR: BufferedReader is null!";
}
logger.trace("Processor for thing {} reading response from device", thingID());
return connectionManager.getCommandIn().readLine().trim();
String reply = connectionManager.getCommandIn().readLine();
if (reply == null) {
logger.debug("Read of reply from device returned null!");
return "ERROR: reply is null!";
}
return reply.trim();
}
/*
@ -573,11 +568,9 @@ public class GlobalCacheHandler extends BaseThingHandler {
logger.warn("Can't send serial command; output stream is null!");
return;
}
byte[] deviceCommand;
deviceCommand = URLDecoder.decode(requestMessage.getDeviceCommand(), StandardCharsets.ISO_8859_1)
.getBytes(StandardCharsets.ISO_8859_1);
logger.debug("Writing decoded deviceCommand byte array: {}", getAsHexString(deviceCommand));
out.write(deviceCommand);
}