Package org.eclipse.jgit.revwalk

Class RewriteGenerator

java.lang.Object

org.eclipse.jgit.revwalk.Generator

org.eclipse.jgit.revwalk.RewriteGenerator

class RewriteGenerator
extends Generator

Replaces a RevCommit's parents until not colored with REWRITE.

Before a RevCommit is returned to the caller its parents are updated to create a dense DAG. Instead of reporting the actual parents as recorded when the commit was created the returned commit will reflect the next closest commit that matched the revision walker's filters.

This generator is the second phase of a path limited revision walk and assumes it is receiving RevCommits from TreeRevFilter, after they have been fully buffered by AbstractRevQueue. The full buffering is necessary to allow the simple loop used within our own rewrite(RevCommit) to pull completely through a strand of RevWalk.REWRITE colored commits and come up with a simplification that makes the DAG dense. Not fully buffering the commits first would cause this loop to abort early, due to commits not being parsed and colored correctly.

See Also:

TreeRevFilter

Field Summary

Fields

Modifier and Type	Field	Description
private static int	DUPLICATE	For cleanup(RevCommit[]) to remove duplicate parents.
private static int	REWRITE
private Generator	source

Fields inherited from class org.eclipse.jgit.revwalk.Generator

firstParent, HAS_REWRITE, HAS_UNINTERESTING, NEEDS_REWRITE, SORT_COMMIT_TIME_DESC, SORT_TOPO

Constructor Summary

Constructors

Constructor	Description
RewriteGenerator(Generator s)

Method Summary

Modifier and Type	Method	Description
private RevCommit[]	cleanup(RevCommit[] oldList)
(package private) RevCommit	next()	Return the next commit to the application, or the next generator.
(package private) int	outputType()	Obtain flags describing the output behavior of this generator.
private RevCommit	rewrite(RevCommit p)
(package private) void	shareFreeList(BlockRevQueue q)	Connect the supplied queue to this generator's own free list (if any).

Methods inherited from class java.lang.Object

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

Field Detail

REWRITE

private static final int REWRITE

See Also:

Constant Field Values

DUPLICATE

private static final int DUPLICATE

For cleanup(RevCommit[]) to remove duplicate parents.

See Also:

Constant Field Values

source

private final Generator source

Constructor Detail

RewriteGenerator

RewriteGenerator(Generator s)

Method Detail

shareFreeList

void shareFreeList(BlockRevQueue q)

Description copied from class: Generator

Connect the supplied queue to this generator's own free list (if any).

Overrides:

shareFreeList in class Generator

Parameters:

q - another FIFO queue that wants to share our queue's free list.

outputType

int outputType()

Description copied from class: Generator

Obtain flags describing the output behavior of this generator.

Specified by:

outputType in class Generator

Returns:

one or more of the constants declared in this class, describing how this generator produces its results.

next

RevCommit next()
        throws MissingObjectException,
               IncorrectObjectTypeException,
               java.io.IOException

Description copied from class: Generator

Return the next commit to the application, or the next generator.

Specified by:

next in class Generator

Returns:

next available commit; null if no more are to be returned.

Throws:

MissingObjectException

IncorrectObjectTypeException

java.io.IOException

rewrite

private RevCommit rewrite(RevCommit p)

cleanup

private RevCommit[] cleanup(RevCommit[] oldList)