- /*
- * Copyright (C) 2008-2009, Robin Rosenberg <robin.rosenberg@dewire.com>
- * Copyright (C) 2008, Shawn O. Pearce <spearce@spearce.org>
- * 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.revplot;
-
- import static org.eclipse.jgit.lib.Constants.R_HEADS;
- import static org.eclipse.jgit.lib.Constants.R_REMOTES;
- import static org.eclipse.jgit.lib.Constants.R_TAGS;
-
- import java.io.IOException;
- import java.util.Arrays;
- import java.util.Collection;
- import java.util.Comparator;
- import java.util.Map;
- import java.util.Set;
-
- import org.eclipse.jgit.JGitText;
- import org.eclipse.jgit.errors.IncorrectObjectTypeException;
- import org.eclipse.jgit.errors.MissingObjectException;
- import org.eclipse.jgit.lib.AnyObjectId;
- import org.eclipse.jgit.lib.PersonIdent;
- import org.eclipse.jgit.lib.Ref;
- import org.eclipse.jgit.lib.Repository;
- import org.eclipse.jgit.revwalk.RevCommit;
- import org.eclipse.jgit.revwalk.RevObject;
- import org.eclipse.jgit.revwalk.RevSort;
- import org.eclipse.jgit.revwalk.RevTag;
- import org.eclipse.jgit.revwalk.RevWalk;
-
- /** Specialized RevWalk for visualization of a commit graph. */
- public class PlotWalk extends RevWalk {
-
- private Map<AnyObjectId, Set<Ref>> reverseRefMap;
-
- @Override
- public void dispose() {
- super.dispose();
- reverseRefMap.clear();
- }
-
- /**
- * Create a new revision walker for a given repository.
- *
- * @param repo
- * the repository the walker will obtain data from.
- */
- public PlotWalk(final Repository repo) {
- super(repo);
- super.sort(RevSort.TOPO, true);
- reverseRefMap = repo.getAllRefsByPeeledObjectId();
- }
-
- @Override
- public void sort(final RevSort s, final boolean use) {
- if (s == RevSort.TOPO && !use)
- throw new IllegalArgumentException(JGitText.get().topologicalSortRequired);
- super.sort(s, use);
- }
-
- @Override
- protected RevCommit createCommit(final AnyObjectId id) {
- return new PlotCommit(id);
- }
-
- @Override
- public RevCommit next() throws MissingObjectException,
- IncorrectObjectTypeException, IOException {
- PlotCommit<?> pc = (PlotCommit) super.next();
- if (pc != null)
- pc.refs = getRefs(pc);
- return pc;
- }
-
- private Ref[] getRefs(final AnyObjectId commitId) {
- Collection<Ref> list = reverseRefMap.get(commitId);
- Ref[] tags;
- if (list == null)
- tags = null;
- else {
- tags = list.toArray(new Ref[list.size()]);
- Arrays.sort(tags, new PlotRefComparator());
- }
- return tags;
- }
-
- class PlotRefComparator implements Comparator<Ref> {
- public int compare(Ref o1, Ref o2) {
- try {
- RevObject obj1 = parseAny(o1.getObjectId());
- RevObject obj2 = parseAny(o2.getObjectId());
- long t1 = timeof(obj1);
- long t2 = timeof(obj2);
- if (t1 > t2)
- return -1;
- if (t1 < t2)
- return 1;
- } catch (IOException e) {
- // ignore
- }
-
- int cmp = kind(o1) - kind(o2);
- if (cmp == 0)
- cmp = o1.getName().compareTo(o2.getName());
- return cmp;
- }
-
- long timeof(RevObject o) {
- if (o instanceof RevCommit)
- return ((RevCommit) o).getCommitTime();
- if (o instanceof RevTag) {
- RevTag tag = (RevTag) o;
- PersonIdent who = tag.getTaggerIdent();
- return who != null ? who.getWhen().getTime() : 0;
- }
- return 0;
- }
-
- int kind(Ref r) {
- if (r.getName().startsWith(R_TAGS))
- return 0;
- if (r.getName().startsWith(R_HEADS))
- return 1;
- if (r.getName().startsWith(R_REMOTES))
- return 2;
- return 3;
- }
- }
- }
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