/**
* Parse a wiki topic link and return a <code>WikiLink</code> object representing the link. Wiki
* topic links are of the form "Topic?Query#Section".
*
* @param raw The raw topic link text.
* @return A WikiLink object that represents the link.
*/
public static WikiLink parseWikiLink(String raw) {
// note that this functionality was previously handled with a regular
// expression, but the expression caused CPU usage to spike to 100%
// with topics such as "Urnordisch oder Nordwestgermanisch?"
String processed = raw.trim();
WikiLink wikiLink = new WikiLink();
if (StringUtils.isBlank(processed)) {
return new WikiLink();
}
// first look for a section param - "#..."
int sectionPos = processed.indexOf('#');
if (sectionPos != -1 && sectionPos < processed.length()) {
String sectionString = processed.substring(sectionPos + 1);
wikiLink.setSection(sectionString);
if (sectionPos == 0) {
// link is of the form #section, no more to process
return wikiLink;
}
processed = processed.substring(0, sectionPos);
}
// now see if the link ends with a query param - "?..."
int queryPos = processed.indexOf('?', 1);
if (queryPos != -1 && queryPos < processed.length()) {
String queryString = processed.substring(queryPos + 1);
wikiLink.setQuery(queryString);
processed = processed.substring(0, queryPos);
}
// since we're having so much fun, let's find a namespace (default empty).
String namespaceString = "";
int namespacePos = processed.indexOf(':', 1);
if (namespacePos != -1 && namespacePos < processed.length()) {
namespaceString = processed.substring(0, namespacePos);
}
wikiLink.setNamespace(namespaceString);
String topic = processed;
if (namespacePos > 0 && (namespacePos + 1) < processed.length()) {
// get namespace, unless topic ends with a colon
topic = processed.substring(namespacePos + 1);
}
wikiLink.setArticle(Utilities.decodeTopicName(topic, true));
// destination is namespace + topic
wikiLink.setDestination(Utilities.decodeTopicName(processed, true));
return wikiLink;
}
@Test
public void testSetSection() throws Throwable {
WikiLink wikiLink = new WikiLink("/wiki", "en", null);
wikiLink.setSection("testWikiLinkSection");
assertEquals("wikiLink.getSection()", "testWikiLinkSection", wikiLink.getSection());
}
