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Datastructures and utility classes for non-negative integers
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/*
* Copyright (C) 2017 Tobias Meggendorfer
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see .
*/
package de.tum.in.naturals.set;
import it.unimi.dsi.fastutil.ints.IntIterator;
import java.util.NoSuchElementException;
class NatBitSetComplementIterator implements IntIterator {
private final int length;
private final NatBitSet set;
private int current;
@SuppressWarnings("AssignmentOrReturnOfFieldWithMutableType")
public NatBitSetComplementIterator(NatBitSet set, int length) {
this.set = set;
this.length = length;
current = set.nextAbsentIndex(0);
}
@Override
public boolean hasNext() {
return current < length;
}
@Override
public int nextInt() {
if (!hasNext()) {
throw new NoSuchElementException();
}
int result = current;
current = set.nextAbsentIndex(current + 1);
return result;
}
@Override
public void remove() {
if (set.contains(current)) {
throw new IllegalStateException();
}
set.set(current);
}
}
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