/**
* Creates a new character set which matches a character if that character matches either the
* {@code left} or {@code right} character sets.
*
* <p>left | right
*
* @param left The left source character set.
* @param right The right source character set.
*/
public static Chset union(Chset left, Chset right) {
Chset n = left.clone();
for (Range r : right.ranges) {
n.set(r);
}
return n;
}
/**
* Creates a new character set which matches a character if that character matches the {@code
* left} character set but does not match the {@code right} character set.
*
* <p>left - right
*
* @param left The left source character set.
* @param right The right source character set.
*/
public static Chset difference(Chset left, Chset right) {
Chset n = left.clone();
for (Range r : right.ranges) {
n.clear(r);
}
return n;
}
static {
/**
* The id part of the session cookie is expected to be web escaped Base64 encoded, so uses
* a-zA-Z0-9_-, instead of a-zA-Z0-9+/
*/
Chset typeCharSet = Chset.union(Chset.ALNUM, new Chset("_-"));
Chset idCharSet = Chset.union(Chset.ALNUM, new Chset("_-"));
Parser<SessionCookie> servertype = typeCharSet.plus().action(new ServerTypeAction());
Parser<SessionCookie> id = idCharSet.plus().action(new IdAction());
Parser<SessionCookie> pair = Parser.sequence(servertype, new Chset('='), id);
pair = Parser.sequence(servertype, pair);
Parser<SessionCookie> extrapair = Parser.sequence(new Chset(':'), pair);
PARSER = Parser.sequence(pair, extrapair.star());
}