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PlantUML is a component that allows to quickly write diagrams from text.
// THIS FILE HAS BEEN GENERATED BY A PREPROCESSOR.
/* +=======================================================================
* |
* | PlantUML : a free UML diagram generator
* |
* +=======================================================================
*
* (C) Copyright 2009-2024, Arnaud Roques
*
* Project Info: https://plantuml.com
*
* If you like this project or if you find it useful, you can support us at:
*
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*
*
* PlantUML is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License V2.
*
* THE ACCOMPANYING PROGRAM IS PROVIDED UNDER THE TERMS OF THIS ECLIPSE PUBLIC
* LICENSE ("AGREEMENT"). [GNU General Public License V2]
*
* ANY USE, REPRODUCTION OR DISTRIBUTION OF THE PROGRAM CONSTITUTES
* RECIPIENT'S ACCEPTANCE OF THIS AGREEMENT.
*
* You may obtain a copy of the License at
*
* https://www.gnu.org/licenses/old-licenses/gpl-2.0.html
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* PlantUML can occasionally display sponsored or advertising messages. Those
* messages are usually generated on welcome or error images and never on
* functional diagrams.
* See https://plantuml.com/professional if you want to remove them
*
* Images (whatever their format : PNG, SVG, EPS...) generated by running PlantUML
* are owned by the author of their corresponding sources code (that is, their
* textual description in PlantUML language). Those images are not covered by
* this GPL v2 license.
*
* The generated images can then be used without any reference to the GPL v2 license.
* It is not even necessary to stipulate that they have been generated with PlantUML,
* although this will be appreciated by the PlantUML team.
*
* There is an exception : if the textual description in PlantUML language is also covered
* by any license, then the generated images are logically covered
* by the very same license.
*
* This is the IGY distribution (Install GraphViz by Yourself).
* You have to install GraphViz and to setup the GRAPHVIZ_DOT environment variable
* (see https://plantuml.com/graphviz-dot )
*
* Icons provided by OpenIconic : https://useiconic.com/open
* Archimate sprites provided by Archi : http://www.archimatetool.com
* Stdlib AWS provided by https://github.com/milo-minderbinder/AWS-PlantUML
* Stdlib Icons provided https://github.com/tupadr3/plantuml-icon-font-sprites
* ASCIIMathML (c) Peter Jipsen http://www.chapman.edu/~jipsen
* ASCIIMathML (c) David Lippman http://www.pierce.ctc.edu/dlippman
* CafeUndZopfli ported by Eugene Klyuchnikov https://github.com/eustas/CafeUndZopfli
* Brotli (c) by the Brotli Authors https://github.com/google/brotli
* Themes (c) by Brett Schwarz https://github.com/bschwarz/puml-themes
* Twemoji (c) by Twitter at https://twemoji.twitter.com/
*
*/
package net.sourceforge.plantuml.utils;
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.security.SecureRandom;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import net.sourceforge.plantuml.log.Logme;
public class Cypher {
// ::remove file when __HAXE__
final private static Pattern p = Pattern.compile("[\\p{L}\\p{N}]+");
private final SecureRandom rnd = new SecureRandom();
private final Map convert = new HashMap();
private final Set except = new HashSet<>();
private final List words = new ArrayList<>();
public Cypher() {
final InputStream is = Cypher.class.getResourceAsStream("words.txt");
if (is != null)
try {
final BufferedReader br = new BufferedReader(new InputStreamReader(is));
String s;
while ((s = br.readLine()) != null) {
if (s.matches("[a-z]+"))
words.add(s);
}
is.close();
} catch (Exception e) {
Logme.error(e);
}
Collections.shuffle(words, rnd);
}
public synchronized String cypher(String s) {
final Matcher m = p.matcher(s);
final StringBuffer sb = new StringBuffer(); // Can't be switched to StringBuilder in order to support Java 8
while (m.find()) {
final String word = m.group(0);
m.appendReplacement(sb, changeWord(word));
}
m.appendTail(sb);
return sb.toString();
}
private String changeWord(final String word) {
final String lower = word.toLowerCase();
if (except.contains(lower) || lower.matches("^([a-f0-9]{3}|[a-f0-9]{6})$")) {
return word;
}
String res = convert.get(word);
if (res != null) {
return res;
}
int len = word.length();
if (len < 4) {
len = 4;
}
while (true) {
res = buildRandomWord(len);
if (convert.containsValue(res) == false) {
convert.put(word, res);
return res;
}
}
}
private String buildRandomWord(int len) {
for (Iterator it = words.iterator(); it.hasNext();) {
final String s = it.next();
if (s.length() == len) {
it.remove();
return s;
}
}
final StringBuilder sb = new StringBuilder();
for (int i = 0; i < len; i++) {
final char letter = (char) ('a' + rnd.nextInt(26));
sb.append(letter);
}
return sb.toString();
}
public void addException(String word) {
word = word.toLowerCase();
if (words.contains(word)) {
System.err.println("CypherWarning:" + word);
words.remove(word);
}
except.add(word);
}
}