TabooMan！

src/main/java/me/skymc/taboolib/commands/internal/InternalCommand.java

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+package me.skymc.taboolib.commands.internal;
+
+/**
+ * @Author sky
+ * @Since 2018-05-07 21:36
+ */
+public class InternalMainCommand {
+
+}

src/main/java/me/skymc/taboolib/commands/internal/InternalCommandExecutor.java

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+package me.skymc.taboolib.commands.internal;
+
+/**
+ * @Author sky
+ * @Since 2018-05-07 21:38
+ */
+public class InternalCommandExecutor {
+
+}

src/main/java/me/skymc/taboolib/commands/internal/InternalSubCommand.java

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+package me.skymc.taboolib.commands.internal;
+
+import org.bukkit.command.Command;
+import org.bukkit.command.CommandSender;
+
+/**
+ * @author Bkm016
+ * @since 2018-04-17
+ */
+public interface InternalCommand {
+	
+	String getLabel();
+	
+	String getDescription();
+	
+	InternalCommandArgument[] getArguments();
+	
+	void onCommand(CommandSender sender, Command command, String label, String[] args);
+
+}

src/main/java/me/skymc/taboolib/commands/internal/InternalSubCommandExecutor.java

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+package me.skymc.taboolib.commands.internal;
+
+import org.bukkit.command.CommandSender;
+import org.bukkit.command.ConsoleCommandSender;
+
+import java.util.List;
+import java.util.stream.Collectors;
+import java.util.stream.IntStream;
+
+/**
+ * @author Bkm016
+ * @since 2018-04-17
+ */
+public abstract class InternalCommandExecutor implements InternalCommand {
+
+    public InternalCommandType getType() {
+        return InternalCommandType.ALL;
+    }
+
+    public boolean requiredPlayer() {
+        return false;
+    }
+
+    public boolean isParameterConform(String[] args) {
+        return IntStream.range(0, getArguments().length).noneMatch(i -> getArguments()[i].isRequired() && (args == null || args.length <= i));
+    }
+
+    public boolean isConfirmType(CommandSender sender, InternalCommandType commandType) {
+        return commandType == InternalCommandType.ALL || sender instanceof ConsoleCommandSender && commandType == InternalCommandType.CONSOLE;
+    }
+
+    public List<String> getTabCompleter(List<InternalCommandExecutor> internalCommandExecutors, String[] args) {
+        return args.length == 1 ? internalCommandExecutors.stream().filter(internalCommandExecutor -> internalCommandExecutor != null && (args[0].isEmpty() || internalCommandExecutor.getLabel().startsWith(args[0]))).map(InternalCommand::getLabel).collect(Collectors.toList()) : null;
+    }
+
+    public String getCommandString(String label) {
+        StringBuilder stringBuilder = new StringBuilder();
+        stringBuilder.append("§f /");
+        stringBuilder.append(label);
+        stringBuilder.append(" ");
+        stringBuilder.append(getLabel());
+        stringBuilder.append(" ");
+        for (InternalCommandArgument parameter : getArguments()) {
+            stringBuilder.append(parameter.toString());
+            stringBuilder.append(" ");
+        }
+        stringBuilder.append("§6- §e");
+        stringBuilder.append(getDescription());
+        return stringBuilder.toString();
+    }
+}

src/main/java/me/skymc/taboolib/commands/internal/InternalSubCommandType.java

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+package me.skymc.taboolib.commands.internal;
+
+/**
+ * @author Bkm016
+ * @since 2018-04-17
+ */
+public enum InternalCommandType {
+	
+	CONSOLE, PLAYER, ALL
+
+}

src/main/java/me/skymc/taboolib/commands/plugin/TabooLibPluginCommand.java

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+package me.skymc.taboolib.commands.plugin;
+
+/**
+ * @Author sky
+ * @Since 2018-05-07 20:14
+ */
+public class TabooLibPluginCommand {
+
+}