@Override
public String toString() {
String str = "";
for (int i = 0; i < FormulaType.values().length; i++)
if (leftFormulas[i] != null) str += leftFormulas[i].toString();
return str + "==>\n" + (rightSide == null ? "" : rightSide.toString());
}
@Override
public void addLeft(Formula wff) {
int idx = wff.getIndex();
if (!leftSide.get(idx)) {
leftSide.set(idx); // set the bit
int type_idx = FormulaType.getFormulaType(wff).ordinal();
if (leftFormulas[type_idx] == null) leftFormulas[type_idx] = new LinkedList<Formula>();
leftFormulas[type_idx].add(wff);
}
}
@Override
public boolean removeLeft(Formula wff) {
int idx = wff.getIndex();
if (leftSide.get(idx)) {
leftSide.set(idx, false);
int type_idx = FormulaType.getFormulaType(wff).ordinal();
LinkedList<Formula> list = leftFormulas[type_idx];
list.remove(wff);
if (list.size() == 0) leftFormulas[type_idx] = null;
return true;
} else return false;
}
@SuppressWarnings("unchecked")
@Override
public SingleSuccedentSequentOnBitSet clone() {
try {
SingleSuccedentSequentOnBitSet result = (SingleSuccedentSequentOnBitSet) super.clone();
result.leftSide = (BitSet) this.leftSide.clone();
result.leftFormulas = (LinkedList<Formula>[]) new LinkedList[FormulaType.values().length];
for (int i = 0; i < this.leftFormulas.length; i++)
if (this.leftFormulas[i] != null)
result.leftFormulas[i] = (LinkedList<Formula>) this.leftFormulas[i].clone();
result.rightSide = this.rightSide;
return result;
} catch (CloneNotSupportedException e) {
throw new ImplementationError(e.getMessage());
}
}
@SuppressWarnings("unchecked")
public SingleSuccedentSequentOnBitSet(FormulaFactory factory) {
leftSide = new BitSet(factory.numberOfGeneratedFormulas());
leftFormulas = new LinkedList[FormulaType.values().length];
rightSide = null;
}
@Override
public Formula getRightFormulaOfType(FormulaType formulaType) {
if (rightSide != null && FormulaType.getFormulaType(rightSide) == formulaType) return rightSide;
else return null;
}
@Override
public Formula getLeft(FormulaType formulaType) {
LinkedList<Formula> list = leftFormulas[formulaType.ordinal()];
if (list == null) return null;
else return list.getFirst();
}
@Override
public Collection<Formula> getAllLeftFormulas(FormulaType formulaType) {
return leftFormulas[formulaType.ordinal()];
}