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/*
* Copyright (C) 2008, Shawn O. Pearce <spearce@spearce.org> and others
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Distribution License v. 1.0 which is available at
* https://www.eclipse.org/org/documents/edl-v10.php.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
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 org.eclipse.jgit.revwalk.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<>();
}
/**
* Create a set of flags, copied from an existing set.
*
* @param s
* the set to copy flags from.
*/
public RevFlagSet(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(Collection<RevFlag> s) {
this();
addAll(s);
}
/** {@inheritDoc} */
@Override
public boolean contains(Object o) {
if (o instanceof RevFlag)
return (mask & ((RevFlag) o).mask) != 0;
return false;
}
/** {@inheritDoc} */
@Override
public boolean containsAll(Collection<?> c) {
if (c instanceof RevFlagSet) {
final int cMask = ((RevFlagSet) c).mask;
return (mask & cMask) == cMask;
}
return super.containsAll(c);
}
/** {@inheritDoc} */
@Override
public boolean add(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;
}
/** {@inheritDoc} */
@Override
public boolean remove(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;
}
/** {@inheritDoc} */
@Override
public Iterator<RevFlag> iterator() {
final Iterator<RevFlag> i = active.iterator();
return new Iterator<RevFlag>() {
private RevFlag current;
@Override
public boolean hasNext() {
return i.hasNext();
}
@Override
public RevFlag next() {
return current = i.next();
}
@Override
public void remove() {
mask &= ~current.mask;
i.remove();
}
};
}
/** {@inheritDoc} */
@Override
public int size() {
return active.size();
}
}
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