/**
* 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;
}
@Override
public String activeCommandSummary() {
StringBuilder sb = new StringBuilder();
String comma = "";
for (GcodeCommand gc : activeCommandList) {
sb.append(comma).append(gc.getCommandString());
comma = ", ";
}
if (commandStream != null) {
sb.append(comma).append(commandStream.getNumRowsRemaining()).append(" streaming commands.");
}
return sb.toString();
}
@Override
public int numActiveCommands() {
int streamingCount = commandStream == null ? 0 : commandStream.getNumRowsRemaining();
return this.activeCommandList.size() + streamingCount;
}