private void executeOnlyChoiceRule() {
accept(
new SquareVisitor() {
@Override
public void visit(Square square) {
if (square.candidates.size() == 1) {
setValue(square, square.candidates.iterator().next());
}
}
});
boolean changeMade;
do {
changeMade = false;
for (int i = 1; i <= size; i++) {
changeMade = executeRuleTwo(i) || changeMade;
}
} while (changeMade);
}
private boolean executeRuleTwo(final int value) {
final boolean[] result = new boolean[1];
result[0] = false;
accept(
new SquareCollectionVisitor() {
@Override
public void visit(SquareCollection collection) {
RuleTwoVisitor visitor = new RuleTwoVisitor(value);
collection.accept(visitor);
Square candidate = visitor.getCandidate();
if (candidate != null) {
result[0] = true;
setValue(candidate, value);
}
}
});
return result[0];
}
public int getRemainingCandidates() {
RemainingCandidatesVisitor visitor = new RemainingCandidatesVisitor();
accept(visitor);
return visitor.getRemainingCandidates();
}
public int getRemainingSquares() {
RemainingSquaresVisitor visitor = new RemainingSquaresVisitor();
accept(visitor);
return visitor.getRemainingSquares();
}