/**
* modify this bitset by removing anything that is in s (logically bitwise: this = this AND ( NOT
* s)) return true if any modification, otherwise false
*
* @param s BitSet
* @return BitSet
*/
public boolean subtract(NodeIdSet s) {
boolean subOk = false;
byte[] test = s.getBytes();
int minLength = ((storage.length < test.length) ? storage.length : test.length);
byte oldValue = 0;
for (int i = 0; i < minLength; ++i) {
oldValue = storage[i];
storage[i] &= ~test[i];
if (storage[i] != oldValue) subOk = true;
}
return subOk;
}
/**
* modify this bitset by removing anything that is NOT also in s (logically bitwise: this = this
* AND s) return true if any modification, otherwise false
*
* @param s BitSet
* @return boolean
*/
public boolean removeComplement(NodeIdSet s) {
boolean rcOk = false;
byte[] test = s.getBytes();
int minLength = ((storage.length < test.length) ? storage.length : test.length);
byte oldValue = 0;
for (int i = 0; i < minLength; ++i) {
oldValue = storage[i];
storage[i] &= test[i];
if (storage[i] != oldValue) rcOk = true;
}
return rcOk;
}
/**
* are there any bits in both this and s?
*
* @param s BitSet
* @return boolean
*/
public boolean overlap(NodeIdSet s) {
boolean overlapOk = false;
byte[] test = s.getBytes();
int minLength = ((storage.length < test.length) ? storage.length : test.length);
for (int i = 0; i < minLength; ++i) {
if ((storage[i] & test[i]) != 0) {
overlapOk = true;
break;
}
}
return overlapOk;
}
/**
* modify this bitset by adding all the bits that are in s (logically bitwise: this = this OR s)
* return true if any modification, otherwise false
*
* @param s BitSet
* @return BitSet
*/
public boolean merge(NodeIdSet s) {
boolean mergeOk = false;
int msb = s.getMaxBitPos();
if (msb > this.size()) storage = createByteArray(msb, storage);
byte[] test = s.getBytes();
byte oldValue = 0;
for (int i = 0; i < storage.length; ++i) {
oldValue = storage[i];
storage[i] |= test[i];
if (storage[i] != oldValue) mergeOk = true;
}
return mergeOk;
}
/**
* Return a new identical copy
*
* @return BitSet
*/
public Object clone() {
NodeIdSet cloneBS = new NodeIdSet(this.size());
byte[] cloneStorage = cloneBS.getBytes();
for (int i = 0; i < storage.length; ++i) cloneStorage[i] = storage[i];
return cloneBS;
}
/**
* are all the bits in this contained in s?
*
* @param s BitSet
* @return boolean
*/
public boolean containedIn(NodeIdSet s) {
return compare(s.getBytes(), storage);
}
/**
* Are all the bits in s contained in this?
*
* @param s BitSet
* @return boolean
*/
public boolean contains(NodeIdSet s) {
return compare(storage, s.getBytes());
}