org.eclipse.jgit.revwalk
Class RevWalkUtils

java.lang.Object
  org.eclipse.jgit.revwalk.RevWalkUtils

public final class RevWalkUtils
extends Object

Utility methods for RevWalk.

Method Summary

static int	count(RevWalk walk, RevCommit start, RevCommit end) Count the number of commits that are reachable from start until a commit that is reachable from end is encountered.
static List<RevCommit>	find(RevWalk walk, RevCommit start, RevCommit end) Find commits that are reachable from start until a commit that is reachable from end is encountered.
static List<Ref>	findBranchesReachableFrom(RevCommit commit, RevWalk revWalk, Collection<Ref> refs) Find the list of branches a given commit is reachable from when following parent.s

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

count

public static int count(RevWalk walk,
                        RevCommit start,
                        RevCommit end)
                 throws MissingObjectException,
                        IncorrectObjectTypeException,
                        IOException

Count the number of commits that are reachable from start until a commit that is reachable from end is encountered. In other words, count the number of commits that are in start, but not in end.

Note that this method calls RevWalk.reset() at the beginning. Also note that the existing rev filter on the walk is left as-is, so be sure to set the right rev filter before calling this method.

Parameters:

walk - the rev walk to use

start - the commit to start counting from

end - the commit where counting should end, or null if counting should be done until there are no more commits

Returns:

the number of commits

Throws:

MissingObjectException

IncorrectObjectTypeException

IOException

find

public static List<RevCommit> find(RevWalk walk,
                                   RevCommit start,
                                   RevCommit end)
                            throws MissingObjectException,
                                   IncorrectObjectTypeException,
                                   IOException

Find commits that are reachable from start until a commit that is reachable from end is encountered. In other words, Find of commits that are in start, but not in end.

Note that this method calls RevWalk.reset() at the beginning. Also note that the existing rev filter on the walk is left as-is, so be sure to set the right rev filter before calling this method.

Parameters:

walk - the rev walk to use

start - the commit to start counting from

end - the commit where counting should end, or null if counting should be done until there are no more commits

Returns:

the commits found

Throws:

MissingObjectException

IncorrectObjectTypeException

IOException

findBranchesReachableFrom

public static List<Ref> findBranchesReachableFrom(RevCommit commit,
                                                  RevWalk revWalk,
                                                  Collection<Ref> refs)
                                           throws MissingObjectException,
                                                  IncorrectObjectTypeException,
                                                  IOException

Find the list of branches a given commit is reachable from when following parent.s

Note that this method calls RevWalk.reset() at the beginning.

In order to improve performance this method assumes clock skew among committers is never larger than 24 hours.

Parameters:

commit - the commit we are looking at

revWalk - The RevWalk to be used.

refs - the set of branches we want to see reachability from

Returns:

the list of branches a given commit is reachable from

Throws:

MissingObjectException

IncorrectObjectTypeException

IOException