/**
* Attempt to execute a command. This version takes a separate command name (for the root command)
* and then a list of following arguments.
*
* @param cmd command to run
* @param args arguments
* @param player command source
* @param methodArgs method arguments
* @throws CommandException
*/
public void execute(String cmd, String[] args, T player, Object... methodArgs)
throws CommandException {
String[] newArgs = new String[args.length + 1];
System.arraycopy(args, 0, newArgs, 1, args.length);
newArgs[0] = cmd;
Object[] newMethodArgs = new Object[methodArgs.length + 1];
System.arraycopy(methodArgs, 0, newMethodArgs, 1, methodArgs.length);
executeMethod(null, newArgs, player, newMethodArgs, 0);
}
/**
* Attempt to execute a command.
*
* @param parent
* @param args
* @param player
* @param methodArgs
* @param level
* @throws CommandException
*/
public void executeMethod(Method parent, String[] args, T player, Object[] methodArgs, int level)
throws CommandException {
String cmdName = args[level];
Map<String, Method> map = commands.get(parent);
Method method = map.get(cmdName.toLowerCase());
if (method == null) {
if (parent == null) { // Root
throw new UnhandledCommandException();
} else {
throw new MissingNestedCommandException(
"Unknown command: " + cmdName, getNestedUsage(args, level - 1, parent, player));
}
}
checkPermission(player, method);
int argsCount = args.length - 1 - level;
// checks if we need to execute the body of the nested command method (false)
// or display the help what commands are available (true)
// this is all for an args count of 0 if it is > 0 and a NestedCommand Annotation is present
// it will always handle the methods that NestedCommand points to
// e.g.:
// - /cmd - @NestedCommand(executeBody = true) will go into the else loop and execute code in
// that method
// - /cmd <arg1> <arg2> - @NestedCommand(executeBody = true) will always go to the nested
// command class
// - /cmd <arg1> - @NestedCommand(executeBody = false) will always go to the nested command
// class not matter the args
boolean executeNested =
method.isAnnotationPresent(NestedCommand.class)
&& (argsCount > 0 || !method.getAnnotation(NestedCommand.class).executeBody());
if (executeNested) {
if (argsCount == 0) {
throw new MissingNestedCommandException(
"Sub-command required.", getNestedUsage(args, level, method, player));
} else {
executeMethod(method, args, player, methodArgs, level + 1);
}
} else if (method.isAnnotationPresent(CommandAlias.class)) {
CommandAlias aCmd = method.getAnnotation(CommandAlias.class);
executeMethod(parent, aCmd.value(), player, methodArgs, level);
} else {
if (method.isAnnotationPresent(RequireSenderType.class)) {
WrappedCommandSender.Type requiredType =
method.getAnnotation(RequireSenderType.class).value();
if (!getType(player).equals(requiredType)) {
throw new CommandUsageException(
"Wrong sender type.",
String.format(
"You need to be a %s to use this command!", requiredType.name().toLowerCase()));
}
}
Command cmd = method.getAnnotation(Command.class);
String[] newArgs = new String[args.length - level];
System.arraycopy(args, level, newArgs, 0, args.length - level);
final Set<Character> valueFlags = new HashSet<Character>();
char[] flags = cmd.flags().toCharArray();
Set<Character> newFlags = new HashSet<Character>();
for (int i = 0; i < flags.length; ++i) {
if (flags.length > i + 1 && flags[i + 1] == ':') {
valueFlags.add(flags[i]);
++i;
}
newFlags.add(flags[i]);
}
CommandContext context = new CommandContext(newArgs, valueFlags);
if (context.argsLength() < cmd.min()) {
throw new CommandUsageException("Too few arguments.", getUsage(args, level, cmd));
}
if (cmd.max() != -1 && context.argsLength() > cmd.max()) {
throw new CommandUsageException("Too many arguments.", getUsage(args, level, cmd));
}
if (!cmd.anyFlags()) {
for (char flag : context.getFlags()) {
if (!newFlags.contains(flag)) {
throw new CommandUsageException("Unknown flag: " + flag, getUsage(args, level, cmd));
}
}
}
methodArgs[0] = context;
Object instance = instances.get(method);
invokeMethod(parent, args, player, method, instance, methodArgs, argsCount);
}
}
