org.drools.core.util.bitmask.AllSetBitMask 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;
public class AllSetBitMask extends SingleLongBitMask implements BitMask, AllSetMask {
private static final AllSetBitMask INSTANCE = new AllSetBitMask();
private AllSetBitMask() { }
public static AllSetBitMask get() {
return INSTANCE;
}
@Override
public BitMask set(int index) {
return this;
}
@Override
public BitMask setAll(BitMask mask) {
return this;
}
@Override
public BitMask reset(int index) {
return BitMask.Factory.getFull(index+1).reset(index);
}
@Override
public BitMask resetAll(BitMask mask) {
if (mask.isEmpty()) {
return this;
} else if (mask instanceof EmptyButLastBitMask) {
return AllSetButLastBitMask.get();
} else if (mask instanceof AllSetBitMask) {
return EmptyBitMask.get();
} else if (mask instanceof AllSetButLastBitMask) {
return EmptyButLastBitMask.get();
}
return BitMask.Factory.getFull(mask instanceof LongBitMask ? 1 : 65).resetAll(mask);
}
@Override
public boolean isSet(int index) {
return true;
}
@Override
public boolean isAllSet() {
return true;
}
@Override
public boolean isEmpty() {
return false;
}
@Override
public boolean intersects(BitMask mask) {
return true;
}
@Override
public long asLong() {
return -1L;
}
@Override
public AllSetBitMask clone() {
return this;
}
@Override
public String getInstancingStatement() {
return AllSetBitMask.class.getCanonicalName() + ".get()";
}
}