mirror of https://github.com/octoleo/plantuml.git
137 lines
3.7 KiB
Java
137 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 2009-2023, 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.windowsdot;
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import java.io.BufferedOutputStream;
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import java.io.File;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.OutputStream;
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import net.sourceforge.plantuml.brotli.BrotliInputStream;
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import net.sourceforge.plantuml.log.Logme;
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public final class WindowsDotArchive {
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private static WindowsDotArchive singleton = null;
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private Boolean isThereArchive;
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private File exe;
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private WindowsDotArchive() {
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}
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public final synchronized static WindowsDotArchive getInstance() {
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if (singleton == null)
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singleton = new WindowsDotArchive();
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return singleton;
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}
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final static public String readString(InputStream is) throws IOException {
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int len = readByte(is);
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final StringBuilder sb = new StringBuilder(len);
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for (int i = 0; i < len; i++) {
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sb.append((char) readByte(is));
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}
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return sb.toString();
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}
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final static public int readNumber(InputStream is) throws IOException {
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int result = readByte(is);
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result = result * 256 + readByte(is);
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result = result * 256 + readByte(is);
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return result;
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}
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private static int readByte(InputStream is) throws IOException {
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return is.read();
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}
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private static void extract(File dir) throws IOException {
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final InputStream raw = WindowsDotArchive.class.getResourceAsStream("graphviz.dat");
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try (final BrotliInputStream is = new BrotliInputStream(raw)) {
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while (true) {
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final String name = readString(is);
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if (name.length() == 0)
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break;
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final int size = readNumber(is);
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final File fileout = new File(dir, name);
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if (fileout.exists())
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for (int i = 0; i < size; i++)
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is.read();
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else
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try (final OutputStream fos = new BufferedOutputStream(new FileOutputStream(fileout))) {
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for (int i = 0; i < size; i++)
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fos.write(is.read());
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}
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}
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}
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}
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public synchronized boolean isThereArchive() {
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if (isThereArchive == null)
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try (InputStream raw = WindowsDotArchive.class.getResourceAsStream("graphviz.dat")) {
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isThereArchive = raw != null;
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} catch (Exception e) {
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isThereArchive = false;
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}
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return isThereArchive;
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}
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public synchronized File getWindowsExeLite() {
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if (isThereArchive() == false)
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return null;
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if (exe == null) {
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final File tmp = new File(System.getProperty("java.io.tmpdir"), "_graphviz");
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try {
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tmp.mkdirs();
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extract(tmp);
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} catch (IOException e) {
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Logme.error(e);
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}
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exe = new File(tmp, "dot.exe");
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}
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return exe;
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}
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}
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