/**
* Merges the query parameters of the url with the named parameters from the {@link
* PageParameters}. The page parameters override the query parameters.
*
* @param url the url with the original parameters
* @param params the page parameters to merge
* @return an Url with merged parameters
*/
public static Url mergeParameters(final Url url, final PageParameters params) {
if (params == null) {
return url;
}
Charset charset = url.getCharset();
Url mergedUrl = Url.parse(url.toString(), charset);
UrlEncoder urlEncoder = UrlEncoder.QUERY_INSTANCE;
Set<String> setParameters = new HashSet<String>();
int indexedCount = params.getIndexedCount();
if (indexedCount > 0) {
String jsessionidString = null;
List<String> segments = mergedUrl.getSegments();
if (segments.size() > 0) {
String lastSegment = segments.get(segments.size() - 1);
int jsessionidIndex = lastSegment.indexOf(";jsessionid=");
if (jsessionidIndex != -1) {
segments.set(segments.size() - 1, lastSegment.substring(0, jsessionidIndex));
jsessionidString = lastSegment.substring(jsessionidIndex);
}
}
for (int i = 0; i < indexedCount; i++) {
segments.add(params.get(i).toString());
}
if (jsessionidString != null) {
segments.set(
segments.size() - 1, segments.get(segments.size() - 1).concat(jsessionidString));
}
}
for (INamedParameters.NamedPair pair : params.getAllNamed()) {
String key = urlEncoder.encode(pair.getKey(), charset);
String value = urlEncoder.encode(pair.getValue(), charset);
if (setParameters.contains(key)) {
mergedUrl.addQueryParameter(key, value);
} else {
mergedUrl.setQueryParameter(key, value);
setParameters.add(key);
}
}
return mergedUrl;
}
