+
+ /**
+ * Replace everything except RNA secondary structure characters with a period
+ *
+ * @param s
+ * @return
+ */
+ public static String replaceOddGaps(String s)
+ {
+ if (s == null)
+ {
+ return null;
+ }
+
+ // this is measured to be 10 times faster than a regex replace
+ boolean changed = false;
+ byte[] bytes = s.getBytes();
+ for (int i = 0; i < bytes.length; i++)
+ {
+ boolean ok = false;
+ // todo check for ((b >= 'a' && b <= 'z') || (b >= 'A' && b <= 'Z')) if
+ // wanted also
+ for (int j = 0; !ok && (j < PAIRS.length); j++)
+ {
+ if (bytes[i] == PAIRS[j])
+ {
+ ok = true;
+ }
+ }
+ if (!ok)
+ {
+ bytes[i] = '.';
+ changed = true;
+ }
+ }
+ return changed ? new String(bytes) : s;
+ }