Add SWCommand.enabled for enabling and disabling commands

SpigotCore_Main/src/de/steamwar/command/SWCommand.java

@@ -33,6 +33,7 @@ import static de.steamwar.command.SWCommandUtils.getAnnotation;
 
 public abstract class SWCommand {
 
+    private boolean enabled = true;
     private final Set<SubCommand> commandSet = new HashSet<>();
     private final Set<SubCommand> commandHelpSet = new HashSet<>();
 
@@ -44,6 +45,7 @@ public abstract class SWCommand {
         SWCommandUtils.commandMap.register("steamwar", new Command(command, "", "/" + command, Arrays.asList(aliases)) {
             @Override
             public boolean execute(CommandSender sender, String alias, String[] args) {
+                if (!enabled) return false;
                 for (SubCommand subCommand : commandSet) {
                     if (subCommand.invoke(sender, args)) {
                         return false;
@@ -59,6 +61,7 @@ public abstract class SWCommand {
 
             @Override
             public List<String> tabComplete(CommandSender sender, String alias, String[] args) throws IllegalArgumentException {
+                if (!enabled) return Collections.emptyList();
                 List<String> strings = new ArrayList<>();
                 for (SubCommand subCommand : commandSet) {
                     List<String> tabCompletes = subCommand.tabComplete(sender, args);
@@ -132,6 +135,14 @@ public abstract class SWCommand {
         consumer.accept(anno, parameters);
     }
 
+    protected boolean isEnabled() {
+        return enabled;
+    }
+
+    protected void setEnabled(boolean enabled) {
+        this.enabled = enabled;
+    }
+
     @Retention(RetentionPolicy.RUNTIME)
     @Target({ElementType.METHOD})
     protected @interface Register {