/**
* UPnP PortMapper - A tool for managing port forwardings via UPnP
* Copyright (C) 2015 Christoph Pirkl <christoph at users.sourceforge.net>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/**
*
*/
package org.chris.portmapper.util;
import java.util.HashMap;
import java.util.Map;
public class EncodingUtilities {
private static Map<Character, String> knownEncodings;
static {
knownEncodings = new HashMap<>();
knownEncodings.put('<', "<");
knownEncodings.put('>', ">");
knownEncodings.put('&', "&");
}
/**
* Replace all special characters with their html entities.
*
* @param s
* the string in which to replace the special characters.
* @return the result of the replacement.
*/
public static String htmlEntityEncode(final String s) {
final StringBuffer buf = new StringBuffer();
for (int i = 0; i < s.length(); i++) {
final char c = s.charAt(i);
if (c >= 'a' && c <= 'z' || c >= 'A' && c <= 'Z' || c >= '0' && c <= '9') {
buf.append(c);
} else {
if (knownEncodings.containsKey(c)) {
buf.append(knownEncodings.get(c));
} else {
buf.append("" + (int) c + ";");
}
}
}
return buf.toString();
}
}