import java.util.ArrayList;

		assert getChunkCompressionType(x, z) != CompressionType.External;

		assert getChunkCompressionType(x, z) != CompressionType.EXTERNAL;

	 * Where External means that chunk's data is moved into a separate file.

	 * Where EXTERNAL means that chunk's data is moved into a separate file.

		None(3),
		External(129);

		NONE(3),
		EXTERNAL(129);

		private final static ArrayList<CompressionType> values;
		static
		{
			values = new ArrayList<>();
			values.add(RFC1952.ordinal(), RFC1952);
			values.add(RFC1950.ordinal(), RFC1950);
			values.add(NONE.ordinal(), NONE);
			values.add(EXTERNAL.ordinal(), EXTERNAL);
		}

			return value < External.ordinal() ? values()[value] : External;

			return value < EXTERNAL.ordinal() ? values.get(value) : EXTERNAL;

}

}

import java.text.MessageFormat;

import java.util.ArrayList;

import static java.text.MessageFormat.format;

 * Simple system that keeps track of activity on unmodified generated chunks,
 * and removes them if it meets criteria of "not so often visited chunk" (later laƶy chunk).
 * Always triggers at server shutdown, if enabled.

 * Simple system that keeps track of activity on an unmodified, generated chunks,
 * and removes them if it meets criteria of "not so often visited chunk" (later, laƶy chunk).
 * Always triggers at server shutdown, if enabled (disabled by default).

{/*
	private boolean worldCleanEnabled = false;	// read from config, leave false as default. also WIP.
	public final int latestWorkingVersion = "1.20";

{
	private static boolean enabled;
	public static final String latestWorkingVersion;

	if (!Bukkit.getVersion().contains(latestWorkingVersion))

	static

		enabled = false;
		getLogger().warning(i18n("All ChunkDegenerator instances are disabled. Request testing and patching from others, to return this functionality." + "\n" +
		i18n("This is a protection against world corrupting from implementation changes, feel free to ignore this, if you're not a user of World Cleaners."));

		enabled = false; // Read enabled value from config or a command (WIP)
		latestWorkingVersion = "1.20.1";
		if (!getVersion().contains(latestWorkingVersion))
		{
			enabled = false;
			getLogger().warning(format("{0} {1}", i18n("All ChunkDegenerator instances are disabled. Request testing and patching from others, to return this functionality.",
			i18n("This is a protection against world corrupting from implementation changes, feel free to ignore this, if you're not a user of World Cleaners."))));
		}

	private byte[] readChunkAt(final int x, final int z) throws FileNotFoundException, SecurityException

	/**
	 * Conclude given chunk's activity by how many players visit it.
	 * @param x chunk longitude
	 * @param z chunk latitude
	 */
	private void getChunkActivity(final int x, final int z)

		File regionsDir = new File(MessageFormat.format("{0}/region", worldFolder));

		File regionsDir = new File(format("{0}{1}region", worldFolder, File.pathSeparator));

			throw new FileNotFoundException(MessageFormat.format(i18n("{0} is not a directory or does not exist. World path is probably wrong."), new Object[] { worldRegions.getAbsolute() }));

			getLogger().severe(format(i18n("{0} is not a directory or does not exist. World path is probably wrong."), new Object[] { regionsDir.getAbsolutePath() }));

			if (!f.getName().matches("r\\.[0-9]+\\.[0-9]+\\.mca")) continue;
			if (!(f.exists() && f.isFile()))

			if (!f.getName().matches("r\\.-?[0-9]+\\.-?[0-9]+\\.mca")) continue;
			if (!f.exists() || !f.isFile())

				throw new FileNotFoundException(MessageFormat.format(i18n("{0} is not a regular file."), new Object[] { f.getAbsolute() }));

				getLogger().warning(format(i18n("{0} is not a regular file."), new Object[] { f.getAbsolutePath() }));

			if (!(f.canRead() && f.canWrite()))

			if (!f.canRead() && !f.canWrite())

				throw new SecurityException(MessageFormat.format(i18n("{0} is not writable for me. Cannot operate further."), new Object[] { f.getAbsolute() }));

				getLogger().warning(format(i18n("{0} is not writable for me. Cannot operate further."), new Object[] { f.getAbsolutePath() }));

			worldRegions.add(new RandomAccessFile(f, "rw"));

			try { worldRegions.add(new WorldRegion(f, "rw")); }
			catch (FileNotFoundException ex) {}

	}*/

	}