Adding permissions to example plugin

Hi, I am trying to add permissions to the scrapbook plugin for the command /clearinventory.

Here is current code:

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Code:

package com.dinnerbone.bukkit.scrap.commands;

import com.dinnerbone.bukkit.scrap.ScrapBukkit;
import org.bukkit.ChatColor;
import org.bukkit.command.Command;
import org.bukkit.command.CommandExecutor;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;

public class ClearPluginCommand implements CommandExecutor {
    private final ScrapBukkit plugin;

    public ClearPluginCommand(ScrapBukkit plugin) {
        this.plugin = plugin;
    }

    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
        if (!sender.isOp()) {
            sender.sendMessage("You do not have permission to clean players' inventories");
            return false;
        }
        if (args.length > 1) {
            return false;
        }

        Player player = null;

        if (args.length == 1) {
            player = plugin.matchPlayer(args, sender);
            if (player == null) return false;
        } else if (plugin.anonymousCheck(sender)) {
            return false;
        } else {
            player = (Player)sender;
        }

        sender.sendMessage("Cleared inventory of " + player.getDisplayName());
        player.getInventory().clear();
        return true;
    }

I have added the permissions methods to check if permissions is enabled, and then I have created two nodes for "basic.clear.self" and "basic.clear.other"

Now this is where I am stuck, distinguishing between wether they are checking another player or themselves. I want it so that if the playername was Bob and he had the permission for .self:

/clearinventory Bob would work fine
/clearinventory would work fine
/clearinventory tim would throw up a permission error

can someone please paste an example of the easiest way to do this?

Never mind, I think I managed to do it.

EDIT by Moderator: merged posts, please use the edit button instead of double posting.