prod/net/jaekl/cfb/util/XmlEscape.java

   1 package net.jaekl.cfb.util;
   2
   3 import java.util.Arrays;
   4 import java.util.Collections;
   5 import java.util.List;
   6
   7 public class XmlEscape {
   8         // The following code adapted from:
   9         // http://stackoverflow.com/questions/439298/best-way-to-encode-text-data-for-xml-in-java#439311
  10         private final static String ESCAPE_CHARS = "<>&\"\'";
  11         private final static List<String> ESCAPE_STRINGS =
  12                         Collections.unmodifiableList(Arrays.asList(new String[] {"&lt;", "&gt;", "&amp;", "&quot;", "&apos;" }));
  13
  14         //should only use for the content of an attribute or tag
  15         public static String toEscaped(String content) {
  16                 String result = content;
  17
  18                 if ((content != null) && (content.length() > 0)) {
  19                         boolean modified = false;
  20                         StringBuilder stringBuilder = new StringBuilder(content.length());
  21                         for (int i = 0, count = content.length(); i < count; ++i) {
  22                                 String character = content.substring(i, i + 1);
  23                                 int pos = ESCAPE_CHARS.indexOf(character);
  24                                 if (pos > -1) {
  25                                         stringBuilder.append(ESCAPE_STRINGS.get(pos));
  26                                         modified = true;
  27                                 }
  28                                 else {
  29                                     stringBuilder.append(character);
  30                                 }
  31                         }
  32                         if (modified) {
  33                             result = stringBuilder.toString();
  34                         }
  35                 }
  36
  37                 return result;
  38         }
  39 }