Access

Prepends a single element.

Appends a single element.

Replaces the terminal version with the given term. If the new term is on the same tree level as the old term, the term is replaced, otherwise a new tree is entered (the new term is appended twice).

Drops the last element.

Retrieves the version information associated with the access path.

Splits off last term, returning index (init) and that last term.

Drops the head element.

Truncates the path to a prefix corresponding to the most recent transaction along the path which has occurred not after a given point in (system) time.

In other words, calling info on the returned path results in a VersionInfo object whose timeStamp field is less than or equal to the timeStamp argument of this method. The only exception is if the timeStamp argument is smaller than the root version of system; in that case, the root path is returned instead of an empty path.

'''Note:''' This assumes that incremental versions correspond with incremental time stamps. This is not enforced and if this is not the case, the behaviour is undefined. Furthermore, if it is allowed that multiple successive versions have the same time stamp. In that case, it is undefined which of these versions is returned.