[+] Fixed tab completion, and added more examples

Author: damt

src/main/java/xyz/damt/command/executor/CommandExecutor.java

@@ -58,7 +58,7 @@ public boolean execute(CommandSender commandSender, String s, String[] strings)
 
     @Override
     public List<String> tabComplete(CommandSender sender, String alias, String[] args) throws IllegalArgumentException {
-        CommandParameter commandParameter = command.getCommandParameters().get(args.length);
+        CommandParameter commandParameter = command.getCommandParameters().get(args.length - 1);
 
         if (commandParameter == null)
             return command.getTabComplete().get(command, command.getSubCommands(), args);

src/test/java/xyz/damt/example/Main.java

@@ -4,9 +4,12 @@
 import org.bukkit.inventory.ItemStack;
 import org.bukkit.plugin.java.JavaPlugin;
 import xyz.damt.command.CommandHandler;
+import xyz.damt.command.complete.impl.DefaultTabCompleter;
 import xyz.damt.command.help.impl.DefaultHelpCommandService;
 import xyz.damt.example.command.FlyCommand;
 import xyz.damt.example.command.ItemStackCommand;
+import xyz.damt.example.completer.TabCompleter;
+import xyz.damt.example.help.HelpService;
 import xyz.damt.example.provider.ItemStackProvider;
 
 @Getter
@@ -16,14 +19,12 @@ public class Main extends JavaPlugin {
     private static Main instance;
 
     @Override
-    public void onLoad() {
+    public void onEnable() {
         instance = this;
-    }
 
-    @Override
-    public void onEnable() {
         new CommandHandler(this).bind(ItemStack.class, new ItemStackProvider())
-                .register(new FlyCommand(), new ItemStackCommand()).helpService(new DefaultHelpCommandService("&c", "&7")).registerCommands();
+                .register(new FlyCommand(), new ItemStackCommand()).helpService(new HelpService())
+                .tabComplete(new TabCompleter()).registerCommands();
     }
 
 }

src/test/java/xyz/damt/example/completer/TabCompleter.java

@@ -0,0 +1,16 @@
+package xyz.damt.example.completer;
+
+import xyz.damt.command.command.Command;
+import xyz.damt.command.complete.TabComplete;
+
+import java.util.List;
+import java.util.stream.Collectors;
+
+public class TabCompleter implements TabComplete {
+
+    @Override
+    public List<String> get(Command command, List<Command> subCommands, String[] args) {
+        return subCommands.stream().map(subCommand -> subCommand.getName() + "\n").collect(Collectors.toList());
+    }
+
+}

src/test/java/xyz/damt/example/help/HelpService.java

@@ -0,0 +1,16 @@
+package xyz.damt.example.help;
+
+import xyz.damt.command.command.Command;
+import xyz.damt.command.help.HelpCommandService;
+
+import java.util.List;
+import java.util.stream.Collectors;
+
+public class HelpService implements HelpCommandService {
+
+    @Override
+    public List<String> get(Command command, List<Command> subCommands) {
+        return subCommands.stream().map(command1 -> command.getUsage() + ", ").collect(Collectors.toList());
+    }
+
+}