public static URI parseLinkRelation(String link, String relation) throws InvalidLinkException {
Precondition.acceptArgument("link", link, Assertions.notNull());
Precondition.acceptArgument("relation", relation, Assertions.notNull());
String suffix = getSuffix(relation);
String tLink = link.trim();
if (!(tLink.startsWith(LINK_HEADER_PREFIX) && tLink.endsWith(suffix))) {
throw new InvalidLinkException(
"Invalid link header format for relation '" + relation + "'", tLink);
}
try {
String base = tLink.substring(LINK_HEADER_PREFIX.length(), tLink.length() - suffix.length());
return new URI(base);
} catch (URISyntaxException e) {
throw new InvalidLinkException(
"Could not process link for relation '" + relation + "'", e, tLink);
}
}
public static String create(String link, String relation) {
Precondition.acceptArgument("link", link, Assertions.notNull());
Precondition.acceptArgument("relation", relation, Assertions.notNull());
return String.format("<%s>; rel='%s'", link, relation);
}
public static URI parseSelf(String link) throws InvalidLinkException {
Precondition.acceptArgument("link", link, Assertions.notNull());
return parseLinkRelation(link, "self");
}