- * Answers true if the string is not empty and consists only of digits, or
- * characters 'a'-'f' or 'A'-'F', else false
+ * Answers the input string with any occurrences of the 'encodeable' characters
+ * replaced by their URL encoding
+ *
+ * @param s
+ * @param encodable
+ * @return
+ */
+ public static String urlEncode(String s, String encodable)
+ {
+ if (s == null || s.isEmpty())
+ {
+ return s;
+ }
+
+ /*
+ * do % encoding first, as otherwise it may double-encode!
+ */
+ if (encodable.indexOf(PERCENT) != -1)
+ {
+ s = urlEncode(s, PERCENT);
+ }
+
+ for (char c : encodable.toCharArray())
+ {
+ if (c != PERCENT)
+ {
+ s = urlEncode(s, c);
+ }
+ }
+ return s;
+ }
+
+ /**
+ * Answers the input string with any occurrences of {@code c} replaced with
+ * their url encoding. Answers the input string if it is unchanged.
+ *
+ * @param s
+ * @param c
+ * @return
+ */
+ static String urlEncode(String s, char c)
+ {
+ String decoded = String.valueOf(c);
+ if (s.indexOf(decoded) != -1)
+ {
+ String encoded = getUrlEncoding(c);
+ if (!encoded.equals(decoded))
+ {
+ s = s.replace(decoded, encoded);
+ }
+ }
+ return s;
+ }
+
+ /**
+ * Answers the input string with any occurrences of the specified (unencoded)
+ * characters replaced by their URL decoding.
+ * <p>
+ * Example: {@code urlDecode("a%3Db%3Bc", "-;=,")} should answer
+ * {@code "a=b;c"}.