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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.util.AbstractSet;
- import java.util.ArrayList;
- import java.util.Collection;
- import java.util.Iterator;
- import java.util.List;
-
- /**
- * Multiple application level mark bits for {@link RevObject}s.
- *
- * @see RevFlag
- */
- public class RevFlagSet extends AbstractSet<RevFlag> {
- int mask;
-
- private final List<RevFlag> active;
-
- /** Create an empty set of flags. */
- public RevFlagSet() {
- active = new ArrayList<RevFlag>();
- }
-
- /**
- * Create a set of flags, copied from an existing set.
- *
- * @param s
- * the set to copy flags from.
- */
- public RevFlagSet(final RevFlagSet s) {
- mask = s.mask;
- active = new ArrayList<RevFlag>(s.active);
- }
-
- /**
- * Create a set of flags, copied from an existing collection.
- *
- * @param s
- * the collection to copy flags from.
- */
- public RevFlagSet(final Collection<RevFlag> s) {
- this();
- addAll(s);
- }
-
- @Override
- public boolean contains(final Object o) {
- if (o instanceof RevFlag)
- return (mask & ((RevFlag) o).mask) != 0;
- return false;
- }
-
- @Override
- public boolean containsAll(final Collection<?> c) {
- if (c instanceof RevFlagSet) {
- final int cMask = ((RevFlagSet) c).mask;
- return (mask & cMask) == cMask;
- }
- return super.containsAll(c);
- }
-
- @Override
- public boolean add(final RevFlag flag) {
- if ((mask & flag.mask) != 0)
- return false;
- mask |= flag.mask;
- int p = 0;
- while (p < active.size() && active.get(p).mask < flag.mask)
- p++;
- active.add(p, flag);
- return true;
- }
-
- @Override
- public boolean remove(final Object o) {
- final RevFlag flag = (RevFlag) o;
- if ((mask & flag.mask) == 0)
- return false;
- mask &= ~flag.mask;
- for (int i = 0; i < active.size(); i++)
- if (active.get(i).mask == flag.mask)
- active.remove(i);
- return true;
- }
-
- @Override
- public Iterator<RevFlag> iterator() {
- final Iterator<RevFlag> i = active.iterator();
- return new Iterator<RevFlag>() {
- private RevFlag current;
-
- public boolean hasNext() {
- return i.hasNext();
- }
-
- public RevFlag next() {
- return current = i.next();
- }
-
- public void remove() {
- mask &= ~current.mask;
- i.remove();
- }
- };
- }
-
- @Override
- public int size() {
- return active.size();
- }
- }
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