@Override
public void propagate(int evtmask) throws ContradictionException {
int min = 0;
int max = 0;
ISet nodes = g.getPotentialNodes();
for (int i = nodes.getFirstElement(); i >= 0; i = nodes.getNextElement()) {
if (g.getMandSuccOrNeighOf(i).contain(i)) {
min++;
max++;
} else if (g.getPotSuccOrNeighOf(i).contain(i)) {
max++;
}
}
k.updateLowerBound(min, aCause);
k.updateUpperBound(max, aCause);
if (min == max) {
setPassive();
} else if (k.isInstantiated()) {
if (k.getValue() == max) {
for (int i = nodes.getFirstElement(); i >= 0; i = nodes.getNextElement()) {
if (g.getPotSuccOrNeighOf(i).contain(i)) {
g.enforceArc(i, i, aCause);
}
}
setPassive();
} else if (k.getValue() == min) {
for (int i = nodes.getFirstElement(); i >= 0; i = nodes.getNextElement()) {
if (!g.getMandSuccOrNeighOf(i).contain(i)) {
g.removeArc(i, i, aCause);
}
}
setPassive();
}
}
}
@Override
public ESat isEntailed() {
int min = 0;
int max = 0;
ISet env = g.getPotentialNodes();
for (int i = env.getFirstElement(); i >= 0; i = env.getNextElement()) {
if (g.getMandSuccOrNeighOf(i).contain(i)) {
min++;
max++;
} else if (g.getPotSuccOrNeighOf(i).contain(i)) {
max++;
}
}
if (k.getLB() > max || k.getUB() < min) {
return ESat.FALSE;
}
if (min == max) {
return ESat.TRUE;
}
return ESat.UNDEFINED;
}
