mirror of https://github.com/octoleo/plantuml.git
109 lines
3.7 KiB
Java
109 lines
3.7 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.IOException;
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public class TranscoderSmart2 implements Transcoder {
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// Legacy encoder
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private final Transcoder oldOne = TranscoderImpl.utf8(new AsciiEncoder(), new ArobaseStringCompressor2(),
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new CompressionHuffman());
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private final Transcoder zlib = TranscoderImpl.utf8(new AsciiEncoder(), new ArobaseStringCompressor2(),
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new CompressionZlib());
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private final Transcoder brotli = TranscoderImpl.utf8(new AsciiEncoder(), new ArobaseStringCompressor2(),
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new CompressionBrotli());
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private final Transcoder zlibBase64 = TranscoderImpl.utf8(new AsciiEncoderBase64(), new ArobaseStringCompressor2(),
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new CompressionZlib());
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private final Transcoder brotliBase64 = TranscoderImpl.utf8(new AsciiEncoderBase64(),
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new ArobaseStringCompressor2(), new CompressionBrotli());
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private final Transcoder base64only = TranscoderImpl.utf8(new AsciiEncoderBase64(), new ArobaseStringCompressor2(),
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new CompressionNone());
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private final Transcoder hexOnly = TranscoderImpl.utf8(new AsciiEncoderHex(), new ArobaseStringCompressor2(),
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new CompressionNone());
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public String decode(String code) throws NoPlantumlCompressionException {
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// Work in progress
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// See https://github.com/plantuml/plantuml/issues/117
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// Two char headers
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if (code.startsWith("0A")) {
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return zlibBase64.decode(code.substring(2));
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}
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if (code.startsWith("0B")) {
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return brotliBase64.decode(code.substring(2));
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}
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if (code.startsWith("0C")) {
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return base64only.decode(code.substring(2));
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}
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if (code.startsWith("0D")) {
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return hexOnly.decode(code.substring(2));
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}
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// Text prefix
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// Just a wild try: use them only for testing
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if (code.startsWith("-deflate-")) {
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return zlibBase64.decode(code.substring("-deflate-".length()));
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}
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if (code.startsWith("-brotli-")) {
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return brotliBase64.decode(code.substring("-brotli-".length()));
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}
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if (code.startsWith("-base64-")) {
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return base64only.decode(code.substring("-base64-".length()));
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}
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if (code.startsWith("-hex-")) {
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return hexOnly.decode(code.substring("-hex-".length()));
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}
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// Legacy decoding : you should not use it any more.
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if (code.startsWith("0")) {
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return brotli.decode(code.substring(1));
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}
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try {
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return zlib.decode(code);
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} catch (Exception ex) {
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return oldOne.decode(code);
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}
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// return zlib.decode(code);
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}
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public String encode(String text) throws IOException {
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// Right now, we still use the legacy encoding.
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// This will be changed in the incoming months
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return zlib.encode(text);
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}
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}
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