| /* |
| * Copyright (C) 2011, Google Inc. |
| * and other copyright owners as documented in the project's IP log. |
| * |
| * This program and the accompanying materials are made available |
| * under the terms of the Eclipse Distribution License v1.0 which |
| * accompanies this distribution, is reproduced below, and is |
| * available at http://www.eclipse.org/org/documents/edl-v10.php |
| * |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or |
| * without modification, are permitted provided that the following |
| * conditions are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * - Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following |
| * disclaimer in the documentation and/or other materials provided |
| * with the distribution. |
| * |
| * - Neither the name of the Eclipse Foundation, Inc. nor the |
| * names of its contributors may be used to endorse or promote |
| * products derived from this software without specific prior |
| * written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND |
| * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, |
| * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
| * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
| * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| package org.eclipse.jgit.blame; |
| |
| import java.io.IOException; |
| |
| import org.eclipse.jgit.errors.IncorrectObjectTypeException; |
| import org.eclipse.jgit.errors.MissingObjectException; |
| import org.eclipse.jgit.lib.AnyObjectId; |
| import org.eclipse.jgit.lib.Repository; |
| import org.eclipse.jgit.revwalk.RevCommit; |
| import org.eclipse.jgit.revwalk.RevWalk; |
| |
| final class ReverseWalk extends RevWalk { |
| ReverseWalk(Repository repo) { |
| super(repo); |
| } |
| |
| @Override |
| public ReverseCommit next() throws MissingObjectException, |
| IncorrectObjectTypeException, IOException { |
| ReverseCommit c = (ReverseCommit) super.next(); |
| if (c == null) |
| return null; |
| for (int pIdx = 0; pIdx < c.getParentCount(); pIdx++) |
| ((ReverseCommit) c.getParent(pIdx)).addChild(c); |
| return c; |
| } |
| |
| @Override |
| protected RevCommit createCommit(AnyObjectId id) { |
| return new ReverseCommit(id); |
| } |
| |
| static final class ReverseCommit extends RevCommit { |
| private static final ReverseCommit[] NO_CHILDREN = {}; |
| |
| private ReverseCommit[] children = NO_CHILDREN; |
| |
| ReverseCommit(AnyObjectId id) { |
| super(id); |
| } |
| |
| void addChild(ReverseCommit c) { |
| // Always put the most recent child onto the front of the list. |
| // This works correctly because our ReverseWalk parent (above) |
| // runs in COMMIT_TIME_DESC order. Older commits will be popped |
| // later and should go in front of the children list so they are |
| // visited first by BlameGenerator when considering candidates. |
| |
| int cnt = children.length; |
| if (cnt == 0) |
| children = new ReverseCommit[] { c }; |
| else if (cnt == 1) |
| children = new ReverseCommit[] { c, children[0] }; |
| else { |
| ReverseCommit[] n = new ReverseCommit[1 + cnt]; |
| n[0] = c; |
| System.arraycopy(children, 0, n, 1, cnt); |
| children = n; |
| } |
| } |
| |
| int getChildCount() { |
| return children.length; |
| } |
| |
| ReverseCommit getChild(final int nth) { |
| return children[nth]; |
| } |
| } |
| } |