mirror of https://github.com/octoleo/plantuml.git
83 lines
2.5 KiB
Java
83 lines
2.5 KiB
Java
/* ========================================================================
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* PlantUML : a free UML diagram generator
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* ========================================================================
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*
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* (C) Copyright 2009-2020, Arnaud Roques
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*
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* Project Info: http://plantuml.com
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*
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* If you like this project or if you find it useful, you can support us at:
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*
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* http://plantuml.com/patreon (only 1$ per month!)
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* http://plantuml.com/paypal
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*
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* This file is part of PlantUML.
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*
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* PlantUML is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* PlantUML distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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* License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
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* USA.
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*
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*
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* Original Author: Arnaud Roques
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*
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*
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*/
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package net.sourceforge.plantuml.code;
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import java.io.ByteArrayInputStream;
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import java.io.ByteArrayOutputStream;
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import java.io.IOException;
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import java.util.zip.Deflater;
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import java.util.zip.DeflaterOutputStream;
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import java.util.zip.InflaterInputStream;
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public class CompressionHuffman implements Compression {
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public byte[] compress(byte[] in) {
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final ByteArrayOutputStream baos = new ByteArrayOutputStream();
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final Deflater deflater = new Deflater(Deflater.HUFFMAN_ONLY);
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deflater.setLevel(9);
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final DeflaterOutputStream gz = new DeflaterOutputStream(baos, deflater);
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try {
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gz.write(in);
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gz.close();
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baos.close();
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return baos.toByteArray();
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} catch (IOException e) {
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throw new IllegalStateException(e.toString());
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}
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}
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public ByteArray decompress(byte[] in) throws NoPlantumlCompressionException {
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try {
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final ByteArrayOutputStream baos = new ByteArrayOutputStream();
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final ByteArrayInputStream bais = new ByteArrayInputStream(in);
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final InflaterInputStream gz = new InflaterInputStream(bais);
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int read;
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while ((read = gz.read()) != -1) {
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baos.write(read);
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}
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gz.close();
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bais.close();
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baos.close();
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return ByteArray.from(baos.toByteArray());
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} catch (IOException e) {
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System.err.println("Not Huffman");
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throw new NoPlantumlCompressionException(e);
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}
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}
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}
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