我正在为一个更大的项目编写一个系统,不同的类在一个CommandHandler中注册命令。命令是带有要执行的代码的类 我的问题:CommandHandler需要一些关于类,名称,权限和用法的信息。
我已经尝试使用@interfaces,但这总是让我 null 。我应该以其他方式这样做还是可以解决这个问题?
代码:CommandHandler中的寄存器
public void register(Class<? extends Command> c) {
CommandInfo info = c.getAnnotation(CommandInfo.class);
if (info == null) return;
try {
commands.put(info.pattern(), c.newInstance());
}
catch (Exception e) {
e.printStackTrace();
}
}
@CommandInfo
@Retention(RetentionPolicy.RUNTIME)
public @interface CommandInfo
{
/**
* The actual name of the command. Not really used anywhere.
*/
public String name();
/**
* A regex pattern that allows minor oddities and alternatives to the
* command name.
*/
public String pattern();
/**
* The usage message, i.e. how the command should be used.
*/
public String usage();
/**
* A description of what the command does.
*/
public String desc();
/**
* The permission required to execute this command.
*/
public String permission();
}
一个命令:
public class SetPortPoint implements Command
{
@CommandInfo(
name = "setportpoint",
pattern = "setportpoint|spp",
usage = "/maa setportpoint <arena> <wavenumber>",
desc = "set a Port point for a Arena at a given Wave",
permission = "mobarenaaddon.porter.setportpoint"
)
public boolean execute(){
//The Code to do
}
}
答案 0 :(得分:0)
您正在请求类的注释,但您请求的内容是放在方法上的。将注释放在类本身上或枚举其方法(getMethods()
)并分别查询每个注释。当然,你所做的取决于你想要的。
另请注意,注释不会继承到子类。