org.eclipse.jgit.revwalk

Class BitmappedReachabilityChecker

java.lang.Object

org.eclipse.jgit.revwalk.BitmappedReachabilityChecker

All Implemented Interfaces:

ReachabilityChecker

class BitmappedReachabilityChecker
extends java.lang.Object
implements ReachabilityChecker

Checks the reachability using bitmaps.

Field Summary

Fields

Modifier and Type	Field and Description
private RevWalk	walk

Constructor Summary

Constructors

Constructor and Description
BitmappedReachabilityChecker(RevWalk walk)

Method Summary

Modifier and Type	Method and Description
java.util.Optional<RevCommit>	areAllReachable(java.util.Collection<RevCommit> targets, java.util.Collection<RevCommit> starters) Check all targets are reachable from the starters.

Methods inherited from class java.lang.Object

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

Field Detail

walk

private final RevWalk walk

Constructor Detail

BitmappedReachabilityChecker

public BitmappedReachabilityChecker(RevWalk walk)
                             throws java.io.IOException

Parameters:

walk - walk on the repository to get or create the bitmaps for the commits. It must have bitmaps.

Throws:

java.lang.AssertionError - runtime exception if walk is over a repository without bitmaps

java.io.IOException - if the index or the object reader cannot be opened.

Method Detail

areAllReachable

public java.util.Optional<RevCommit> areAllReachable(java.util.Collection<RevCommit> targets,
                                                     java.util.Collection<RevCommit> starters)
                                              throws MissingObjectException,
                                                     IncorrectObjectTypeException,
                                                     java.io.IOException

Check all targets are reachable from the starters.

In this implementation, it is recommended to put the most popular starters (e.g. refs/heads tips) at the beginning of the collection

Specified by:

areAllReachable in interface ReachabilityChecker

Parameters:

targets - commits to reach.

starters - known starting points.

Returns:

An unreachable target if at least one of the targets is unreachable. An empty optional if all targets are reachable from the starters.

Throws:

MissingObjectException - if any of the incoming objects doesn't exist in the repository.

IncorrectObjectTypeException - if any of the incoming objects is not a commit or a tag.

java.io.IOException - if any of the underlying indexes or readers can not be opened.