@Override
public int compare(Statement first, Statement second) {
// Cannot use Statement.equals as it does not take Context into account,
// but can check for reference equality (==)
if (first == second) {
return EQUAL;
}
if (first.getSubject().equals(second.getSubject())) {
if (first.getPredicate().equals(second.getPredicate())) {
if (first.getObject().equals(second.getObject())) {
// Context is the only part of a statement that should legitimately be null
if (first.getContext() == null) {
if (second.getContext() == null) {
return EQUAL;
} else {
return BEFORE;
}
} else if (second.getContext() == null) {
return AFTER;
} else {
return ValueComparator.getInstance().compare(first.getContext(), second.getContext());
}
} else {
return ValueComparator.getInstance().compare(first.getObject(), second.getObject());
}
} else {
return ValueComparator.getInstance().compare(first.getPredicate(), second.getPredicate());
}
} else {
return ValueComparator.getInstance().compare(first.getSubject(), second.getSubject());
}
}
@Override
public int hashCode() {
if (hashCode == 0) {
int result = 17;
result = 37 * result + val.hashCode();
result = 37 * result + comp.hashCode();
hashCode = result;
}
return hashCode;
}
@Override
public String getFormatted() {
return comp.getComparatorString() + " " + val.getFormatted();
}
