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/*
* Copyright (C) 2008, Shawn O. Pearce
* 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 {
int mask;
private final List active;
/** Create an empty set of flags. */
public RevFlagSet() {
active = new ArrayList();
}
/**
* 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(s.active);
}
/**
* Create a set of flags, copied from an existing collection.
*
* @param s
* the collection to copy flags from.
*/
public RevFlagSet(final Collection 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 iterator() {
final Iterator i = active.iterator();
return new Iterator() {
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();
}
}