/**
* Derived from Harmony Resolves a given url relative to this url. Resolution rules are the same
* as for {@code java.net.URI.resolve(URI)}
*/
public Uri resolve(Uri relative) {
if (relative == null) {
return null;
}
if (relative.isAbsolute()) {
return relative;
}
UriBuilder result;
if (StringUtils.isEmpty(relative.path)
&& relative.scheme == null
&& relative.authority == null
&& relative.query == null
&& relative.fragment != null) {
// if the relative URI only consists of fragment,
// the resolved URI is very similar to this URI,
// except that it has the fragement from the relative URI.
result = new UriBuilder(this);
result.setFragment(relative.fragment);
} else if (relative.scheme != null) {
result = new UriBuilder(relative);
} else if (relative.authority != null) {
// if the relative URI has authority,
// the resolved URI is almost the same as the relative URI,
// except that it has the scheme of this URI.
result = new UriBuilder(relative);
result.setScheme(scheme);
} else {
// since relative URI has no authority,
// the resolved URI is very similar to this URI,
// except that it has the query and fragment of the relative URI,
// and the path is different.
result = new UriBuilder(this);
result.setFragment(relative.fragment);
result.setQuery(relative.query);
String relativePath = (relative.path == null) ? "" : relative.path;
if (relativePath.startsWith("/")) { // $NON-NLS-1$
result.setPath(relativePath);
} else {
// resolve a relative reference
int endindex = path.lastIndexOf('/') + 1;
result.setPath(normalizePath(path.substring(0, endindex) + relativePath));
}
}
Uri resolved = result.toUri();
validate(resolved);
return resolved;
}
