public boolean verify(KnowledgeBase kb) {
final Map<KnowledgeElement, Boolean> results = new LinkedHashMap<KnowledgeElement, Boolean>();
KnowledgeBaseVisitor visitor =
new AbstractKnowledgeBaseVisitor() {
Collection<Variable> vars = null;
Collection<Variable> varsInBody = new HashSet<Variable>();
Collection<Variable> varsInHead = new ArrayList<Variable>();
DerivationRule context = null;
public boolean visit(DerivationRule r) {
context = r;
varsInHead.clear();
varsInBody.clear();
return true;
}
public void endVisit(DerivationRule r) {
context = null;
Variable var = null;
for (Variable v : varsInHead) {
if (!varsInBody.contains(v)) var = v;
}
if (var == null) reportOK(r);
else reportViolation("variable ", var, " in ", r, " occurs only in rule head");
results.put(r, var == null);
}
public boolean visit(Fact f) {
if (context == null) {
return false;
} else if (context.getHead() == f) {
vars = varsInHead;
} else if (context.getBody().contains(f)) {
vars = varsInBody;
}
return true;
}
public boolean visit(Variable t) {
vars.add(t);
return true;
}
};
kb.accept(visitor);
for (boolean b : results.values()) {
if (!b) return false;
}
return true;
}
public void removeForwardReferences() {
KnowledgeBase kb = this.getKnowledgeBase();
Slot branches = kb.getSlot("branches");
Slot followed_by = kb.getSlot("followed_by");
// logger.debug("Slot "+branches.getName());
// logger.debug("Slot "+followed_by.getName());
Slot label = kb.getSlot("label");
Collection steps = getOwnSlotValues(kb.getSlot("steps"));
for (Iterator iterater = steps.iterator(); iterater.hasNext(); ) {
Instance step = (Instance) iterater.next();
// logger.debug("removeForwardReferences: node ="+step.getOwnSlotValue(label));
/*for (Iterator slots=step.getOwnSlots().iterator(); slots.hasNext();){
logger.debug("has slot "+((Slot)slots.next()).getName());
}*/
try {
if (step.hasOwnSlot(branches)) {
/*logger.debug("removeForwardReferences: "+ step.getOwnSlotValue(label)+
" has branches"); */
step.setOwnSlotValues(branches, new ArrayList());
} else if (step.hasOwnSlot(followed_by)) {
/* logger.debug("removeForwardReferences: "+ step.getOwnSlotValue(label)+
" has followed_by value "+step.getOwnSlotValue(followed_by));*/
step.setOwnSlotValue(followed_by, null);
} else
logger.error(
"removeForwardReferences: "
+ step.getOwnSlotValue(label)
+ "has no followed_by or branches slot");
} catch (Exception e) {
logger.error(
"Exception making " + step.getOwnSlotValue(label) + " null, Message: " + e.getMessage(),
e);
}
}
}
public void readInput(String fileName) {
int i1 = 0;
try {
@SuppressWarnings("resource")
BufferedReader br = new BufferedReader(new FileReader(fileName));
int noOfQueries = Integer.parseInt(br.readLine());
queries = new ArrayList<Predicate>();
for (int i = 0; i < noOfQueries; i++) {
queries.add(new Predicate(br.readLine()));
}
int noOfSentences = Integer.parseInt(br.readLine());
for (i1 = 0; i1 < noOfSentences; i1++) {
KBObj.store(br.readLine());
}
} catch (Exception e) {
System.out.println(e.getMessage() + "sent number:" + i1);
}
}
public void addForwardReferences() {
KnowledgeBase kb = this.getKnowledgeBase();
Collection transitions = getOwnSlotValues(kb.getSlot("transitions"));
Slot fromSlot = kb.getSlot(":FROM");
Slot toSlot = kb.getSlot(":TO");
Instance from = null;
Instance to = null;
Slot branches = kb.getSlot("branches");
Slot followed_by = kb.getSlot("followed_by");
Slot label = kb.getSlot("label");
for (Iterator transition = transitions.iterator(); transition.hasNext(); ) {
Instance inst = (Instance) transition.next();
from = (Instance) inst.getOwnSlotValue(fromSlot);
if (from != null) {
to = (Instance) inst.getOwnSlotValue(toSlot);
if (to != null) {
try {
if (from.hasOwnSlot(branches)) {
/*logger.debug("addForwardReferences: "+ from.getOwnSlotValue(label)+
" has branches"); */
if ((from.getOwnSlotValues(branches) == null)
|| (!from.getOwnSlotValues(branches).contains(to)))
from.addOwnSlotValue(branches, to);
} else if (from.hasOwnSlot(followed_by)) {
/*logger.debug("addForwardReferences: "+ from.getOwnSlotValue(label)+
" has followed by");*/
if (!(to.equals(from.getOwnSlotValue(followed_by))))
from.setOwnSlotValue(followed_by, to);
} else
logger.error(
"addForwardReferences: "
+ from.getOwnSlotValue(label)
+ "has no followed_by or branches slot");
} catch (Exception e) {
logger.error(
"Exception adding "
+ to.getOwnSlotValue(label)
+ " to "
+ from.getOwnSlotValue(label));
}
}
}
}
}
public boolean useGraphWidget() {
KnowledgeBase kb = this.getKnowledgeBase();
return ((kb.getSlot("transitions") != null)
&& (getOwnSlotValues(kb.getSlot("transitions")) != null));
}