/**
* THIS COMMAND CAN ONLY BE CALLED FROM streamCommands UNLESS THE nextCommand OBJECT IS
* SYNCHRONIZED.
*
* <p>Returns the next command with the following priority: 1. nextCommand object if set. 2. Front
* of the commandBuffer collection. 3. Next line in the commandStream.
*
* @return
*/
private GcodeCommand getNextCommand() {
if (nextCommand != null) {
return nextCommand;
} else if (!this.commandBuffer.isEmpty()) {
nextCommand = new GcodeCommand(commandBuffer.pop());
} else
try {
if (rawCommandStream != null && rawCommandStream.ready()) {
nextCommand = new GcodeCommand(rawCommandStream.readLine());
} else if (commandStream != null && commandStream.ready()) {
nextCommand = commandStream.getNextCommand();
}
} catch (IOException ex) {
// Fall through to null handling.
}
if (nextCommand != null) {
nextCommand.setCommandNumber(getNextCommandId());
if (nextCommand.getCommandString().endsWith("\n")) {
nextCommand.setCommand(nextCommand.getCommandString().trim());
}
return nextCommand;
}
return null;
}
MailClient.WireError lastError() {
return errorStack.peek() != null ? errorStack.pop() : null;
}