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PlantUML is a component that allows to quickly write diagrams from text.

There is a newer version: 1.2024.8

// THIS FILE HAS BEEN GENERATED BY A PREPROCESSOR.
package net.sourceforge.plantuml.code;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.zip.Deflater;
import java.util.zip.DeflaterOutputStream;
import java.util.zip.InflaterInputStream;

public class CompressionHuffman implements Compression {
	// ::remove file when __CORE__

	public byte[] compress(byte[] in) {
		final ByteArrayOutputStream baos = new ByteArrayOutputStream();
		final Deflater deflater = new Deflater(Deflater.HUFFMAN_ONLY);
		deflater.setLevel(9);
		final DeflaterOutputStream gz = new DeflaterOutputStream(baos, deflater);
		try {
			gz.write(in);
			gz.close();
			baos.close();
			return baos.toByteArray();
		} catch (IOException e) {
			throw new IllegalStateException(e.toString());
		}
	}

	public ByteArray decompress(byte[] in) throws NoPlantumlCompressionException {
		try {
			final ByteArrayOutputStream baos = new ByteArrayOutputStream();

			final ByteArrayInputStream bais = new ByteArrayInputStream(in);
			final InflaterInputStream gz = new InflaterInputStream(bais);
			int read;
			while ((read = gz.read()) != -1) {
				baos.write(read);
			}
			gz.close();
			bais.close();
			baos.close();
			return ByteArray.from(baos.toByteArray());
		} catch (IOException e) {
			// System.err.println("Not Huffman");
			throw new NoPlantumlCompressionException(e);
		}
	}

}