org.drools.core.util.bitmask.BitMask Maven / Gradle / Ivy
/*
* Copyright 2015 Red Hat, Inc. and/or its affiliates.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.drools.core.util.bitmask;
import java.io.Serializable;
public interface BitMask extends Serializable, Cloneable {
BitMask set(int index);
BitMask setAll(BitMask mask);
BitMask reset(int index);
BitMask resetAll(BitMask mask);
boolean isSet(int index);
boolean isAllSet();
boolean isEmpty();
boolean intersects(BitMask mask);
BitMask clone();
String getInstancingStatement();
public class Factory {
public static BitMask getEmpty(int numBits) {
return numBits <= 64 ? new LongBitMask() : new OpenBitSet(numBits);
}
public static BitMask getFull(int numBits) {
if (numBits <= 64) {
return new LongBitMask(-1L);
}
int nWords = (numBits / 64) + 1;
long[] bits = new long[nWords];
for (int i = 0; i < bits.length; i++) {
bits[i] = -1L;
}
return new OpenBitSet(bits, nWords);
}
}
}