/*
* 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.tree;
import java.io.IOException;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.revwalk.RevCommit;
import org.eclipse.jgit.revwalk.RevTree;
import org.eclipse.jgit.revwalk.RevWalk;
import org.eclipse.jgit.revwalk.filter.RevFilter;
import org.eclipse.jgit.treewalk.TreeWalk;
import org.eclipse.jgit.treewalk.filter.TreeFilter;
import org.gitective.core.filter.commit.CommitFilter;
/**
* Commit filter that wraps a tree filter that includes commits that the tree
* filter includes for at least one path based on a tree walk of the current
* commit's tree and all the current commit's parent trees.
*/
public class CommitParentTreeFilter extends CommitFilter {
private final BaseTreeFilter filter;
/**
* Create commit filter for given tree filter
*
* @param filter
*/
public CommitParentTreeFilter(final TreeFilter filter) {
this.filter = BaseTreeFilter.wrap(filter);
}
@Override
public CommitFilter setRepository(final Repository repository) {
filter.setRepository(repository);
return super.setRepository(repository);
}
@Override
public CommitFilter reset() {
filter.reset();
return super.reset();
}
@Override
public boolean include(final RevWalk walker, final RevCommit commit)
throws IOException {
final TreeWalk walk = new TreeWalk(walker.getObjectReader());
walk.addTree(commit.getTree());
RevTree tree = null;
for (RevCommit parent : commit.getParents()) {
tree = parent.getTree();
if (tree == null) {
walker.parseHeaders(parent);
tree = parent.getTree();
}
walk.addTree(tree);
}
while (walk.next()) {
if (filter.include(walker, commit, walk))
return true;
if (walk.isSubtree())
walk.enterSubtree();
}
return include(false);
}
@Override
public RevFilter clone() {
return new CommitParentTreeFilter(filter);
}
}