Java 如何构造公共模块，以便子模块能够从API中获得正确类型的对象？

嘿，所以我有

common

模块，其中包含代码显示bellow和另外两个模块

bungee

和

bukkit

。我需要如何构造我的代码，以便在每个模块中使用

common

部分代码，而不必在

ChildCommand

中将

Object

转换为

CommandSender

，是否有办法在那里而不是

Object

获得正确的

CommandSender

一些需要记住的事情：

common

模块没有依赖项。

蹦极

模块使用蹦极绳API和

通用

模块作为依赖项。

bukkit

模块使用bukkit API和

common

模块作为依赖项。
Bukkit和Bungeecord API都有自己的

CommandSender

类，但它们并不相同。
不能修改来自API的类

此类是

通用
模块的一部分。

public interface ChildCommand {
    
    void run(Object sender, String[] args);
    
    String getName();
    
}

public abstract class AbstractCommandService<S> {
    
    protected final Set<ChildCommand> childCommands;
    
    protected AbstractCommandService() {
        childCommands = new HashMap<>();
    }
    
    public boolean execute(Object sender, String commandName, String[] args) {
        for (ChildCommand childCommand : childCommands) {
            if (childCommand.getName().equalsIgnoreCase(commandName)) {
                childCommand.run(sender, args);
                return true;
            }
        }
        return false;
    }

    public void addCommand(ChildCommand command) {
        childCommands.add(command);
    }
    
}

public class BungeeReload implements ChildCommand {

    private final String NAME = "reload";

    public BungeeReload() {}

    @Override
    public String getName() {
        return NAME;
    }

    /*how do I structure my code so here I would get `net.md_5.bungee.api.CommandSender` 
    instead of `Object` for the sender parameter.*/
    @Override 
    public void run(Object sender, String[] args) {
        ((CommandSender)sender).sendMessage("Reload command has been ran on bungee.");
    }

}

public class BungeeCommandService extends AbstractCommandService<CommandSender> {}

public class MainBungeeCommand extends Command {

    private BungeeCommandService commandService;    
    
    public MainBungeeCommand() {
        super("cmd-name", "cmd-permission", "cmd-alias");
        commandService = new BungeeCommandService();

        commandService.addCommand(new BungeeReload());
    }

    @Override
    public void execute(CommandSender sender, String[] args) {
        if (args.length > 0) {
            String commandName = args[0];
           
            boolean successfullyExecuted = commandService.execute(sender, commandName, args);
            if (!successfullyExecuted) sender.sendMessage("Unknown command!"));
        } 
    }
    
}

public class BukkitReload implements ChildCommand {

    private final String NAME = "reload";

    public BukkitReload () {}

    @Override
    public String getName() {
        return NAME;
    }

    /*how do I structure my code so here I would get `org.bukkit.command.CommandSender` 
    instead of `Object` for the sender parameter.*/
    @Override 
    public void run(Object sender, String[] args) {
        ((CommandSender)sender).sendMessage("Reload command has been ran on bukkit.");
    }

}

public class BukkitCommandService extends AbstractCommandService<CommandSender> {}

public class MainBukkitCommand implements CommandExecutor {

    private BukkitCommandService commandService;    
    
    public MainBukkitCommand() {
        commandService = new BukkitCommandService();
        commandService.addCommand(new BukkitReload());
    }

    @Override
    public boolean onCommand(CommandSender sender, Command cmd, String label, String[] args) {
        if (args.length > 0) {
            String commandName = args[0];
           
            boolean successfullyExecuted = commandService.execute(sender, commandName, args);
            if (!successfullyExecuted) sender.sendMessage("Unknown command!"));
            return true;
        }
        return false; 
    }
    
}

此类是
bukkit
模块的一部分。

public interface ChildCommand {
    
    void run(Object sender, String[] args);
    
    String getName();
    
}

public abstract class AbstractCommandService<S> {
    
    protected final Set<ChildCommand> childCommands;
    
    protected AbstractCommandService() {
        childCommands = new HashMap<>();
    }
    
    public boolean execute(Object sender, String commandName, String[] args) {
        for (ChildCommand childCommand : childCommands) {
            if (childCommand.getName().equalsIgnoreCase(commandName)) {
                childCommand.run(sender, args);
                return true;
            }
        }
        return false;
    }

    public void addCommand(ChildCommand command) {
        childCommands.add(command);
    }
    
}

public class BungeeReload implements ChildCommand {

    private final String NAME = "reload";

    public BungeeReload() {}

    @Override
    public String getName() {
        return NAME;
    }

    /*how do I structure my code so here I would get `net.md_5.bungee.api.CommandSender` 
    instead of `Object` for the sender parameter.*/
    @Override 
    public void run(Object sender, String[] args) {
        ((CommandSender)sender).sendMessage("Reload command has been ran on bungee.");
    }

}

public class BungeeCommandService extends AbstractCommandService<CommandSender> {}

public class MainBungeeCommand extends Command {

    private BungeeCommandService commandService;    
    
    public MainBungeeCommand() {
        super("cmd-name", "cmd-permission", "cmd-alias");
        commandService = new BungeeCommandService();

        commandService.addCommand(new BungeeReload());
    }

    @Override
    public void execute(CommandSender sender, String[] args) {
        if (args.length > 0) {
            String commandName = args[0];
           
            boolean successfullyExecuted = commandService.execute(sender, commandName, args);
            if (!successfullyExecuted) sender.sendMessage("Unknown command!"));
        } 
    }
    
}

public class BukkitReload implements ChildCommand {

    private final String NAME = "reload";

    public BukkitReload () {}

    @Override
    public String getName() {
        return NAME;
    }

    /*how do I structure my code so here I would get `org.bukkit.command.CommandSender` 
    instead of `Object` for the sender parameter.*/
    @Override 
    public void run(Object sender, String[] args) {
        ((CommandSender)sender).sendMessage("Reload command has been ran on bukkit.");
    }

}

public class BukkitCommandService extends AbstractCommandService<CommandSender> {}

public class MainBukkitCommand implements CommandExecutor {

    private BukkitCommandService commandService;    
    
    public MainBukkitCommand() {
        commandService = new BukkitCommandService();
        commandService.addCommand(new BukkitReload());
    }

    @Override
    public boolean onCommand(CommandSender sender, Command cmd, String label, String[] args) {
        if (args.length > 0) {
            String commandName = args[0];
           
            boolean successfullyExecuted = commandService.execute(sender, commandName, args);
            if (!successfullyExecuted) sender.sendMessage("Unknown command!"));
            return true;
        }
        return false; 
    }
    
}

公共类BukkitReload实现ChildCommand{
私有最终字符串NAME=“reload”；
公共BukkitReload（）{}
@凌驾
公共字符串getName（）{
返回名称；
}
/*我如何构造代码，以便在这里获得'org.bukkit.command.CommandSender'
而不是发送方参数的“Object”*/
@凌驾
公共无效运行（对象发送方，字符串[]args）{
（（CommandSender）sender.sendMessage（“重新加载命令已在bukkit上运行”）；
}
}
公共类BukkitCommandService扩展了AbstractCommandService{}
公共类MainBukkitCommand实现CommandExecutor{
私人BukkitCommandService命令服务；
公共MainBukkitCommand（）{
commandService=新的BukkitCommandService（）；
addCommand（新的BukkitReload（））；
}
@凌驾
公共布尔onCommand（CommandSender、Command cmd、字符串标签、字符串[]args）{
如果（args.length>0）{
String commandName=args[0]；
布尔值successfullyExecuted=commandService.execute（发送方，commandName，args）；
如果（！successfullyExecuted）sender.sendMessage（“未知命令”）；
返回true；
}
返回false；
}
}

这里是API中的类。

来自BungeeCordAPI的类。

来自BungeeCordAPI的类。

从Bukkit API初始化。

从BukkitAPI中初始化