import org.spongepowered.api.util.Identifiable; //导入依赖的package包/类
@Override
public void accumulateContexts(Subject calculable, Set<Context> accumulator)
{
    Optional<CommandSource> sourceOptional = calculable.getCommandSource();
    if (sourceOptional.isPresent())
    {
        CommandSource source = sourceOptional.get();
        if (source instanceof Identifiable)
        {
            UUID uuid = ((Identifiable) source).getUniqueId();
            if (this.plugin.getVirtualChestActions().isPlayerActivated(uuid))
            {
                accumulator.add(this.contextInAction);
                SubjectData data = source.getTransientSubjectData();
                Map<String, Boolean> permissions = data.getPermissions(Collections.singleton(this.contextInAction));
                this.logger.debug("Ignored {} permission(s) for {} (context):", permissions.size(), uuid);
                permissions.forEach((permission, state) -> this.logger.debug("- {} ({})", permission, state));
            }
            else
            {
                accumulator.add(this.contextNotInAction);
            }
        }
    }
}
 

import org.spongepowered.api.util.Identifiable; //导入依赖的package包/类
@Override
public boolean matches(Context context, Subject subject)
{
    Optional<CommandSource> sourceOptional = subject.getCommandSource();
    if (sourceOptional.isPresent())
    {
        CommandSource source = sourceOptional.get();
        if (source instanceof Identifiable)
        {
            UUID uuid = ((Identifiable) source).getUniqueId();
            if (this.plugin.getVirtualChestActions().isPlayerActivated(uuid))
            {
                return this.contextInAction.equals(context);
            }
            else
            {
                return this.contextNotInAction.equals(context);
            }
        }
    }
    return false;
}
 

import org.spongepowered.api.util.Identifiable; //导入依赖的package包/类
@Override
public String getID(CommandSource commandSource) {
	if (commandSource instanceof Identifiable) {
		Identifiable identifiable = (Identifiable) commandSource;
		return identifiable.getUniqueId().toString();
	} else {
		throw new IllegalArgumentException("Not (yet?) implemented: " + commandSource.toString());
	}
}
 

import org.spongepowered.api.util.Identifiable; //导入依赖的package包/类
@Override
public UUID getUUID(String name) {
    Optional<Player> player = Sponge.getServer().getPlayer(name);
    if (player.isPresent()) {
        return player.get().getUniqueId();
    }
    Optional<User> user = userStorageService.get(name);
    return user.map(Identifiable::getUniqueId).orElse(null);
}
 

import org.spongepowered.api.util.Identifiable; //导入依赖的package包/类
public Optional<ArmorStand> getArmorStandAt(Block block) {
    return blockToArmorStand.computeIfAbsent(block, k -> findArmorStandAt(k).map(Identifiable::getUniqueId))
            .flatMap(id -> block.getWorld().flatMap(extent -> extent.getEntity(id)).map(ArmorStand.class::cast));
}
 

import org.spongepowered.api.util.Identifiable; //导入依赖的package包/类
@Override
public CommandResult execute(CommandSource src, CommandContext args) throws CommandException {

  if (!(src instanceof Player)) {
    src.sendMessage(Text.of("You must be a player to use this command (for now ;) )!"));
    return CommandResult.empty();
  }

  Optional<RegionService> optService = Sponge.getServiceManager().provide(RegionService.class);
  if (!optService.isPresent()) {
    src.sendMessage(Text.of(TextColors.DARK_RED, "The region service is not currently running."));
    return CommandResult.empty();
  }

  RegionService service = optService.get();

  Player player = (Player) src;

  Optional<Region> optRef = service.getSelectedRegion(player);
  if (!optRef.isPresent()) {
    player.sendMessage(Text.of(TextColors.RED, "You do not currently have a region selected."));
    return CommandResult.empty();
  }

  Region ref = optRef.get();

  if (!ref.getMembers().contains(player.getUniqueId())) {
    player.sendMessage(Text.of(TextColors.RED, "You must be a member of the region to modify it!"));
    return CommandResult.empty();
  }

  List<UUID> newMembers = args.<User>getAll("player").stream().map(Identifiable::getUniqueId).filter(
      a -> !ref.getMembers().contains(a)
  ).collect(Collectors.toList());

  ref.addMember(newMembers);

  player.sendMessage(Text.of(TextColors.YELLOW, "Added ", newMembers.size(), " players to the region."));

  return CommandResult.success();
}
 

import org.spongepowered.api.util.Identifiable; //导入依赖的package包/类
@Override
public CommandResult execute(CommandSource src, CommandContext args) throws CommandException {

  if (!(src instanceof Player)) {
    src.sendMessage(Text.of("You must be a player to use this command (for now ;) )!"));
    return CommandResult.empty();
  }

  Optional<RegionService> optService = Sponge.getServiceManager().provide(RegionService.class);
  if (!optService.isPresent()) {
    src.sendMessage(Text.of(TextColors.DARK_RED, "The region service is not currently running."));
    return CommandResult.empty();
  }

  RegionService service = optService.get();

  Player player = (Player) src;

  Optional<Region> optRef = service.getSelectedRegion(player);
  if (!optRef.isPresent()) {
    player.sendMessage(Text.of(TextColors.RED, "You do not currently have a region selected."));
    return CommandResult.empty();
  }

  Region ref = optRef.get();

  if (!ref.getMembers().contains(player.getUniqueId())) {
    player.sendMessage(Text.of(TextColors.RED, "You must be a member of the region to modify it!"));
    return CommandResult.empty();
  }

  List<UUID> oldMembers = args.<User>getAll("player").stream().map(Identifiable::getUniqueId).filter(
      a -> ref.getMembers().contains(a)
  ).collect(Collectors.toList());

  ref.remMember(oldMembers);

  player.sendMessage(Text.of(TextColors.YELLOW, "Removed ", oldMembers.size(), " players from the region."));

  return CommandResult.success();
}
 

import org.spongepowered.api.util.Identifiable; //导入依赖的package包/类
private UUID toUUID(CommandSource src)
{
    return src instanceof Identifiable ? ((Identifiable) src).getUniqueId() : UUID.nameUUIDFromBytes(src.getIdentifier().getBytes());
}