import net.minecraft.server.ICommandListener; //导入依赖的package包/类
private ICommandListener getListener(CommandSender sender) {
    if (sender instanceof Player) {
        return ((CraftPlayer) sender).getHandle();
    }
    if (sender instanceof BlockCommandSender) {
        return ((CraftBlockCommandSender) sender).getTileEntity();
    }
    if (sender instanceof CommandMinecart) {
        return ((EntityMinecartCommandBlock) ((CraftMinecartCommand) sender).getHandle()).getCommandBlock();
    }
    if (sender instanceof RemoteConsoleCommandSender) {
        return RemoteControlCommandListener.instance;
    }
    if (sender instanceof ConsoleCommandSender) {
        return ((CraftServer) sender.getServer()).getServer();
    }
    return null;
}
 

import net.minecraft.server.ICommandListener; //导入依赖的package包/类
public ICommandListener getTileEntity() {
    return commandBlock;
}
 

import net.minecraft.server.ICommandListener; //导入依赖的package包/类
public ProxiedNativeCommandSender(ICommandListener orig, CommandSender caller, CommandSender callee) {
    this.orig = orig;
    this.caller = caller;
    this.callee = callee;
}
 

import net.minecraft.server.ICommandListener; //导入依赖的package包/类
public ICommandListener getHandle() {
    return orig;
}
 

import net.minecraft.server.ICommandListener; //导入依赖的package包/类
public CraftBlockCommandSender(ICommandListener commandBlockListenerAbstract) {
    super();
    this.block = commandBlockListenerAbstract;
}
 

import net.minecraft.server.ICommandListener; //导入依赖的package包/类
public ICommandListener getTileEntity() {
    return block;
}