if (s == null) return null;
StringBuffer ret = new StringBuffer();
for(boolean first = true; s.indexOf("${") != -1; first = false) {
ret.append(s.substring(0, s.indexOf("${")));
String s2 = s.substring(s.indexOf("${")+2);
if (s == null) return null;
StringBuffer ret = new StringBuffer();
for(boolean first = true; s.indexOf("${") != -1; first = false) {
ret.append(s.substring(0, s.indexOf("${")));
String s2 = s.substring(s.indexOf("${")+2);