/*
* Copyright (c) 2012 Kevin Sawicki <kevinsawicki@gmail.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
package org.gitective.core.filter.commit;
import static org.eclipse.jgit.lib.Constants.EMPTY_BLOB_ID;
import java.io.IOException;
import java.util.Collection;
import org.eclipse.jgit.diff.DiffEntry;
import org.eclipse.jgit.lib.AbbreviatedObjectId;
import org.eclipse.jgit.revwalk.RevCommit;
import org.eclipse.jgit.revwalk.filter.RevFilter;
/**
* Filter that includes commits that remove an empty blob
* <p>
* The commits included will either delete an existing empty file or edit an
* existing file that was empty but edited to be no longer empty in the given
* commit.
*/
public class EmptyBlobRemoveFilter extends CommitDiffFilter {
/**
* Create empty blob add filter
*/
public EmptyBlobRemoveFilter() {
super();
}
/**
* Create empty blob add filter
*
* @param detectRenames
*/
public EmptyBlobRemoveFilter(final boolean detectRenames) {
super(detectRenames);
}
@Override
public boolean include(final RevCommit commit,
final Collection<DiffEntry> diffs) throws IOException {
for (DiffEntry diff : diffs) {
final AbbreviatedObjectId oldId = diff.getOldId();
if (oldId == null)
continue;
if (EMPTY_BLOB_ID.equals(oldId.toObjectId())
&& !EMPTY_BLOB_ID.equals(diff.getNewId().toObjectId()))
return true;
}
return false;
}
@Override
public RevFilter clone() {
return new EmptyBlobRemoveFilter(detectRenames);
}
}