// find the next local match
@Override
public boolean matches() {
// System.out.println(toString());
// System.out.println(namesToNodes);
// System.err.println("matches: " + myNode.reln);
// this is necessary so that a negated/optional node matches only once
if (finished) {
// System.out.println(false);
return false;
}
while (!finished) {
if (matchChild()) {
if (myNode.isNegated()) {
// negated node only has to fail once
finished = true;
return false; // cannot be optional and negated
} else {
if (myNode.isOptional()) {
finished = true;
}
// System.out.println(true);
return true;
}
} else {
goToNextNodeMatch();
}
}
if (myNode.isNegated()) { // couldn't match my relation/pattern, so
// succeeded!
return true;
} else { // couldn't match my relation/pattern, so failed!
nextMatch = null;
decommitVariableGroups();
decommitNamedNodes();
decommitNamedRelations();
// didn't match, but return true anyway if optional
return myNode.isOptional();
}
}
