import cn.nukkit.command.data.CommandOverload; //导入依赖的package包/类
/**
 * Generates modified command data for the specified player
 * for AvailableCommandsPacket.
 *
 * @return CommandData|null
 */
public CommandDataVersions generateCustomCommandData(Player player) {
    if (!this.testPermission(player)) {
        return null;
    }

    CommandData customData = this.commandData.clone();
    customData.aliases = this.getAliases();
    customData.description = player.getServer().getLanguage().translateString(this.getDescription());
    customData.permission = player.hasPermission(this.getPermission()) ? "any" : "false";
    this.commandParameters.forEach((key, par) -> {
        CommandOverload overload = new CommandOverload();
        overload.input.parameters = par;
        customData.overloads.put(key, overload);
    });
    if (customData.overloads.size() == 0) customData.overloads.put("default", new CommandOverload());
    CommandDataVersions versions = new CommandDataVersions();
    versions.versions.add(customData);
    return versions;
}
 

import cn.nukkit.command.data.CommandOverload; //导入依赖的package包/类
@Override
public void encode() {
    this.reset();
    BinaryStream commandsStream = new BinaryStream();
    this.commands.forEach((name, versions) -> {
        if (name.equals("help")) return;
        ArrayList<String> aliases = new ArrayList<>();
        aliases.addAll(Arrays.asList(versions.versions.get(0).aliases));
        aliases.add(name);
        for (String alias : aliases) {
            commandsStream.putString(alias);
            commandsStream.putString(versions.versions.get(0).description);
            commandsStream.putByte((byte) 0);
            commandsStream.putByte((byte) 0);
            commandsStream.putLInt(-1);
            commandsStream.putUnsignedVarInt(versions.versions.get(0).overloads.size());
            for (CommandOverload overload : versions.versions.get(0).overloads.values()) {
                commandsStream.putUnsignedVarInt(overload.input.parameters.length);
                for (CommandParameter parameter : overload.input.parameters) {
                    commandsStream.putString(parameter.name);
                    commandsStream.putLInt(ARG_FLAG_VALID | getFlag(parameter.type));
                    commandsStream.putBoolean(parameter.optional);
                }
            }
        }
        aliasCommands += (aliases.size() - 1);
    });

    this.putUnsignedVarInt(0);
    this.putUnsignedVarInt(0);
    this.putUnsignedVarInt(0);
    this.putUnsignedVarInt(this.commands.size() + aliasCommands);
    this.put(commandsStream.getBuffer());
}
 

import cn.nukkit.command.data.CommandOverload; //导入依赖的package包/类
public Map<String, CommandOverload> getOverloads() {
    return this.commandData.overloads;
}