[osu!] parse mods from bitwise mod value

mods.java

public static final Map<String, Integer> osuMods = new LinkedHashMap<String, Integer>();

public OsuListener()
{
    osuMods.put("NF", 1);
    osuMods.put("EZ", 2);
    osuMods.put("HD", 8);
    osuMods.put("HR", 16);
    osuMods.put("SD", 32);
    osuMods.put("DT", 64);
    osuMods.put("RL", 128);
    osuMods.put("HT", 256);
    osuMods.put("NC", 512);
    osuMods.put("FL", 1024);
}

/**
 * Parses the mods from the corresponding bitwise value.
 *
 * @param bitVal bitwise mod value
 * @return corresponding mods enabled
 */
public String parseMods(String bitVal)
{
    String mods = "";
    int i = Integer.parseInt(bitVal);
    ListIterator<Entry<String, Integer>> iter = new ArrayList<>(osuMods.entrySet()).listIterator(osuMods.size());

    // go through list backwards for proper display order
    while (iter.hasPrevious()) {
        Entry<String, Integer> entry = iter.previous();

        if (i >= entry.getValue()) {
            i -= entry.getValue();

            // handle repeated implied mods (e.g. NC implies DT)
            if (entry.getKey().equals("NC")) {
                i -= osuMods.get("DT");
            }

            mods = entry.getKey() + mods;
        }
    }

    return mods;
}