Example usage for org.eclipse.jgit.treewalk AbstractTreeIterator reset

Introduction

In this page you can find the example usage for org.eclipse.jgit.treewalk AbstractTreeIterator reset.

Prototype

public void reset() throws CorruptObjectException 

Source Link

Document

Position this iterator on the first entry.

Usage

From source file:MyDiffFormatter.java

License:Eclipse Distribution License

/**
* Determine the differences between two trees.
*
* No output is created, instead only the file paths that are different are
* returned. Callers may choose to format these paths themselves, or convert
* them into {@link FileHeader} instances with a complete edit list by
*
* @param a//from   w  ww  .  ja v a2s  .  com
*            the old (or previous) side.
* @param b
*            the new (or updated) side.
* @return the paths that are different.
* @throws IOException
*             trees cannot be read or file contents cannot be read.
*/
public List<DiffEntry> scan(AbstractTreeIterator a, AbstractTreeIterator b) throws IOException {
    assertHaveRepository();

    TreeWalk walk = new TreeWalk(reader);
    walk.addTree(a);
    walk.addTree(b);
    walk.setRecursive(true);

    TreeFilter filter = getDiffTreeFilterFor(a, b);
    if (pathFilter instanceof FollowFilter) {
        walk.setFilter(AndTreeFilter.create(PathFilter.create(((FollowFilter) pathFilter).getPath()), filter));
    } else {
        walk.setFilter(AndTreeFilter.create(pathFilter, filter));
    }

    source = new ContentSource.Pair(source(a), source(b));

    List<DiffEntry> files = DiffEntry.scan(walk);
    if (pathFilter instanceof FollowFilter && isAdd(files)) {
        // The file we are following was added here, find where it
        // came from so we can properly show the rename or copy,
        // then continue digging backwards.
        //
        a.reset();
        b.reset();
        walk.reset();
        walk.addTree(a);
        walk.addTree(b);
        walk.setFilter(filter);

        if (renameDetector == null)
            setDetectRenames(true);
        files = updateFollowFilter(detectRenames(DiffEntry.scan(walk)));

    } else if (renameDetector != null)
        files = detectRenames(files);

    return files;
}

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