/*
* Copyright (c) 2011 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 java.util.Collection;
import org.eclipse.jgit.diff.DiffEntry;
import org.eclipse.jgit.diff.Edit;
import org.eclipse.jgit.lib.AbbreviatedObjectId;
import org.eclipse.jgit.lib.ObjectReader;
import org.eclipse.jgit.revwalk.RevCommit;
import org.eclipse.jgit.revwalk.RevWalk;
import org.eclipse.jgit.revwalk.filter.RevFilter;
import org.gitective.core.BlobUtils;
/**
* Filter for including commits that introduced a configurable number of line
* differences
*/
public class DiffLineSizeFilter extends CommitDiffEditFilter {
private final int total;
private int count;
/**
* Create a filter that includes commits that introduced a minimum number of
* line differences
*
* @param detectRenames
* @param diffTotal
*/
public DiffLineSizeFilter(final boolean detectRenames, final int diffTotal) {
super(detectRenames);
total = diffTotal;
}
/**
* Create a filter that includes commits that introduced a minimum number of
* line differences
*
* @param diffTotal
*/
public DiffLineSizeFilter(final int diffTotal) {
this(false, diffTotal);
}
/**
* Get the configured difference total
*
* @return total
*/
public int getTotal() {
return total;
}
@Override
public boolean include(RevWalk walker, RevCommit commit,
Collection<DiffEntry> diffs) {
count = 0;
final ObjectReader reader = walker.getObjectReader();
for (DiffEntry diff : diffs) {
if (!isFileDiff(diff))
continue;
final AbbreviatedObjectId oldId = diff.getOldId();
if (oldId == null)
continue;
include(commit, diff, BlobUtils.diff(reader, oldId.toObjectId(),
diff.getNewId().toObjectId()));
if (count >= total)
break;
}
return count >= total ? true : include(false);
}
@Override
protected boolean include(final RevCommit commit, final DiffEntry diff,
final Collection<Edit> edits) {
for (Edit edit : edits) {
include(commit, diff, edit);
if (count >= total)
break;
}
return true;
}
@Override
protected boolean include(final RevCommit commit, final DiffEntry diff,
final Edit edit) {
switch (edit.getType()) {
case DELETE:
count += edit.getLengthA();
break;
case INSERT:
case REPLACE:
count += edit.getLengthB();
break;
}
return true;
}
@Override
public RevFilter clone() {
return new DiffLineSizeFilter(detectRenames, total);
}
}