/**
* Returns any trailing period, comma, semicolon, or colon characters from the given string. This
* method is useful when parsing raw HTML links, in which case trailing punctuation must be
* removed. Note that only punctuation that is not previously matched is trimmed - if the input is
* "http://example.com/page_(page)" then the trailing parantheses will not be trimmed.
*
* @param text The text from which trailing punctuation should be returned.
* @return Any trailing punctuation from the given text, or an empty string otherwise.
*/
private String extractTrailingPunctuation(String text) {
if (StringUtils.isBlank(text)) {
return "";
}
StringBuilder buffer = new StringBuilder();
for (int i = text.length() - 1; i >= 0; i--) {
char c = text.charAt(i);
if (c == '.' || c == ';' || c == ',' || c == ':' || c == '(' || c == '[' || c == '{') {
buffer.append(c);
continue;
}
// if the value ends with ), ] or } then strip it UNLESS there is a matching
// opening tag
if (c == ')' || c == ']' || c == '}') {
String closeChar = String.valueOf(c);
String openChar = (c == ')') ? "(" : ((c == ']') ? "[" : "{");
int pos = Utilities.findMatchingStartTag(text, i, openChar, closeChar);
if (pos == -1) {
buffer.append(c);
continue;
}
}
break;
}
if (buffer.length() == 0) {
return "";
}
buffer = buffer.reverse();
return buffer.toString();
}
