/*
* Takes the initial client cookie value, if any (null otherwise), as well
* as the page load timestamp and creates initial states.
*/
protected void initCookieStates(String plainCookieId, String etagCookieId) {
CookieStates states = getCookieStates();
CookieState plainState;
ZombieCookie cookie = null;
if (plainCookieId == null) {
// may be overridden to UNSUPPORTED after javascript info received
plainState = NEW;
} else if ((cookie = lookupZombieCookie(plainCookieId)) != null) {
if (cookie.hasParent()) {
cookie = cookie.oldestRelative();
plainState = REPLACED_BY_OLDER_PLAIN_COOKIE;
} else {
plainState = EXISTING;
}
} else {
plainState = RESET;
}
if (cookie == null) {
cookie = createZombieCookie();
}
setAndSaveZombieCookie(cookie);
states.setPlainState(plainState);
updateCookieStates(ETAG, etagCookieId);
}
private void setStatesAndBindCookies(CookieType candidateType, ZombieCookie candidateCookie) {
CookieStates states = getCookieStates();
ZombieCookie currentCookie = getZombieCookie();
if (currentCookie.hasParent()) {
// The current selected zombie cookie, in theory, could have a
// new parent inserted from a seperate simultaneous page load
// in a different HTTP session. We don't have a seperate state
// name for this, but in practice we never see it either.
currentCookie = currentCookie.oldestRelative();
log.error("found unexpected parent cookie={}", currentCookie.getId());
}
boolean usingCandidateParent = false;
if (candidateCookie.hasParent()) {
usingCandidateParent = true;
candidateCookie = candidateCookie.oldestRelative();
}
if (candidateCookie.isOlder(currentCookie)) {
states.set(
candidateType, usingCandidateParent ? replacedFromOlderState(candidateType) : EXISTING);
cascadeNewBestCookie(candidateType);
} else {
// Pick a replacementent state for the candidate cookie
setHowCookieWasReplaced(candidateType);
}
// If the incomming candidate cookie had a parent equal to the current
// cookie, we don't have to set a new value.
if (!currentCookie.getId().equals(candidateCookie.getId())) {
setAndSaveZombieCookie(currentCookie.linkTo(candidateCookie));
}
}
