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- /*
- * 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.revwalk;
-
- import java.io.IOException;
-
- import org.eclipse.jgit.errors.IncorrectObjectTypeException;
- import org.eclipse.jgit.errors.MissingObjectException;
-
- /** A queue of commits sorted by commit time order. */
- public class DateRevQueue extends AbstractRevQueue {
- private Entry head;
-
- private Entry free;
-
- /** Create an empty date queue. */
- public DateRevQueue() {
- super();
- }
-
- DateRevQueue(final Generator s) throws MissingObjectException,
- IncorrectObjectTypeException, IOException {
- for (;;) {
- final RevCommit c = s.next();
- if (c == null)
- break;
- add(c);
- }
- }
-
- public void add(final RevCommit c) {
- Entry q = head;
- final long when = c.commitTime;
- final Entry n = newEntry(c);
- if (q == null || when > q.commit.commitTime) {
- n.next = q;
- head = n;
- } else {
- Entry p = q.next;
- while (p != null && p.commit.commitTime > when) {
- q = p;
- p = q.next;
- }
- n.next = q.next;
- q.next = n;
- }
- }
-
- public RevCommit next() {
- final Entry q = head;
- if (q == null)
- return null;
- head = q.next;
- freeEntry(q);
- return q.commit;
- }
-
- /**
- * Peek at the next commit, without removing it.
- *
- * @return the next available commit; null if there are no commits left.
- */
- public RevCommit peek() {
- return head != null ? head.commit : null;
- }
-
- public void clear() {
- head = null;
- free = null;
- }
-
- boolean everbodyHasFlag(final int f) {
- for (Entry q = head; q != null; q = q.next) {
- if ((q.commit.flags & f) == 0)
- return false;
- }
- return true;
- }
-
- boolean anybodyHasFlag(final int f) {
- for (Entry q = head; q != null; q = q.next) {
- if ((q.commit.flags & f) != 0)
- return true;
- }
- return false;
- }
-
- @Override
- int outputType() {
- return outputType | SORT_COMMIT_TIME_DESC;
- }
-
- public String toString() {
- final StringBuilder s = new StringBuilder();
- for (Entry q = head; q != null; q = q.next)
- describe(s, q.commit);
- return s.toString();
- }
-
- private Entry newEntry(final RevCommit c) {
- Entry r = free;
- if (r == null)
- r = new Entry();
- else
- free = r.next;
- r.commit = c;
- return r;
- }
-
- private void freeEntry(final Entry e) {
- e.next = free;
- free = e;
- }
-
- static class Entry {
- Entry next;
-
- RevCommit commit;
- }
- }
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