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93 lines
3.0 KiB
Java
93 lines
3.0 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 TranscoderImpl implements Transcoder {
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static enum Format {
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UTF8, UPF9;
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}
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private final Compression compression;
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private final URLEncoder urlEncoder;
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private final StringCompressor stringCompressor;
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private final Format format;
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private TranscoderImpl(URLEncoder urlEncoder, StringCompressor stringCompressor, Compression compression,
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Format format) {
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this.compression = compression;
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this.urlEncoder = urlEncoder;
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this.stringCompressor = stringCompressor;
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this.format = format;
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}
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public static Transcoder utf8(URLEncoder urlEncoder, StringCompressor stringCompressor, Compression compression) {
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return new TranscoderImpl(urlEncoder, stringCompressor, compression, Format.UTF8);
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}
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public static Transcoder upf9(URLEncoder urlEncoder, StringCompressor stringCompressor, Compression compression) {
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return new TranscoderImpl(urlEncoder, stringCompressor, compression, Format.UPF9);
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}
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public String encode(String text) throws IOException {
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final String stringAnnoted = stringCompressor.compress(text);
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final byte[] data;
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if (format == Format.UTF8)
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data = stringAnnoted.getBytes("UTF-8");
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else
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data = Upf9Encoder.getBytes(stringAnnoted);
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final byte[] compressedData = compression.compress(data);
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return urlEncoder.encode(compressedData);
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}
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public String decode(String code) throws NoPlantumlCompressionException {
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try {
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final byte compressedData[] = urlEncoder.decode(code);
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final ByteArray data = compression.decompress(compressedData);
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final String string = format == Format.UTF8 ? data.toUFT8String() : data.toUPF9String();
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return stringCompressor.decompress(string);
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} catch (Exception e) {
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System.err.println("Cannot decode string");
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throw new NoPlantumlCompressionException(e);
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}
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}
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}
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