private void sendRejectAnswer(
Agent ag,
Desire desire,
CensorComponent cexec,
SpeechAct action,
Secret s,
String answerValue) {
Answer answer = null;
String act = null;
if (action instanceof Update) {
Update update = (Update) action;
answer = new Answer(ag, update.getSenderId(), update.getProposition(), AnswerValue.AV_REJECT);
act = "update";
} else if (action instanceof Revision) {
Revision revision = (Revision) action;
answer =
new Answer(ag, revision.getSenderId(), revision.getProposition(), AnswerValue.AV_REJECT);
act = "revision";
} else if (action instanceof Query) {
Query query = (Query) action;
answer = new Answer(ag, query.getSenderId(), query.getQuestion(), AnswerValue.AV_REJECT);
act = "query";
}
Subgoal answerGoal = new Subgoal(ag, desire);
answerGoal.newStack(answer);
ag.getPlanComponent().addPlan(answerGoal);
cexec.report(
"The reaction '"
+ answerValue
+ "' would reveal secret "
+ s
+ ". Reject the "
+ act
+ ".");
cexec.report(
"Add the new action '" + Answer.class.getSimpleName() + "' to the plan",
ag.getPlanComponent());
}
/**
* Process an incoming query request from an attacking agent. Using the censor component, this
* method first checks if a secret might be revealed by the actual query handling. Based on this
* preprocessing, it either generates a Refusal-SpeechAct or starts the query handling and
* generates an appropriate answer.
*
* @param desire
* @param pp
* @param ag
*/
public boolean processQuery(Desire desire, PlanParameter pp, Agent ag) {
pp.report("Generate new subgoal to process query request");
CensorComponent cexec = ag.getComponent(CensorComponent.class);
Query query = (Query) desire.getPerception();
GeneralView v = ag.getComponent(ViewDataComponent.class).getView(query.getSenderId());
SecrecyKnowledge conf = ag.getComponent(SecrecyKnowledge.class);
GeneralHistory history = null;
pp.report("Invoke censor to check all possible answers for meta inferences");
if (v instanceof View) {
View view = (View) v;
// check for all possible answers to the query, whether this answer would
// potentially reveal a secret and in that case, refuse to answer.
for (Secret a : conf.getSecrets()) {
// ans := true
if (cexec.poss(view.RefineViewByQuery(query.getQuestion(), AnswerValue.AV_TRUE))
&& cexec.scepticalInference(
view.RefineViewByQuery(query.getQuestion(), AnswerValue.AV_TRUE),
a.getInformation())) {
this.sendRejectAnswer(ag, desire, cexec, query, a, "true");
return true;
}
// ans := false
if (cexec.poss(view.RefineViewByQuery(query.getQuestion(), AnswerValue.AV_FALSE))
&& cexec.scepticalInference(
view.RefineViewByQuery(query.getQuestion(), AnswerValue.AV_FALSE),
a.getInformation())) {
this.sendRejectAnswer(ag, desire, cexec, query, a, "false");
return true;
}
// ans := undef
if (cexec.poss(view.RefineViewByQuery(query.getQuestion(), AnswerValue.AV_UNKNOWN))
&& cexec.scepticalInference(
view.RefineViewByQuery(query.getQuestion(), AnswerValue.AV_UNKNOWN),
a.getInformation())) {
this.sendRejectAnswer(ag, desire, cexec, query, a, "unknown");
return true;
}
}
} else if (v instanceof ViewWithCompressedHistory) {
ViewWithCompressedHistory view = (ViewWithCompressedHistory) v;
history = ag.getComponent(HistoryComponent.class).getHistories().get(query.getSenderId());
if (history == null) {
history = new CompressedHistory();
ag.getComponent(HistoryComponent.class).getHistories().put(query.getSenderId(), history);
}
for (Secret a : conf.getSecrets()) {
// ans := true
ViewWithCompressedHistory copyView = new ViewWithCompressedHistory(view);
CompressedHistory refinedHistory = new CompressedHistory((CompressedHistory) history);
refinedHistory.putAction(query, AnswerValue.AV_TRUE);
if (cexec.scepticalInference(copyView, a.getInformation(), refinedHistory)) {
this.sendRejectAnswer(ag, desire, cexec, query, a, "true");
history.putAction(query, AnswerValue.AV_REJECT);
ag.getComponent(HistoryComponent.class).getHistories().put(query.getSenderId(), history);
return true;
}
// ans := false
copyView = new ViewWithCompressedHistory(view);
refinedHistory = new CompressedHistory((CompressedHistory) history);
refinedHistory.putAction(query, AnswerValue.AV_FALSE);
if (cexec.scepticalInference(copyView, a.getInformation(), refinedHistory)) {
this.sendRejectAnswer(ag, desire, cexec, query, a, "false");
history.putAction(query, AnswerValue.AV_REJECT);
ag.getComponent(HistoryComponent.class).getHistories().put(query.getSenderId(), history);
return true;
}
// ans := undef
copyView = new ViewWithCompressedHistory(view);
refinedHistory = new CompressedHistory((CompressedHistory) history);
refinedHistory.putAction(query, AnswerValue.AV_UNKNOWN);
if (cexec.scepticalInference(copyView, a.getInformation(), refinedHistory)) {
this.sendRejectAnswer(ag, desire, cexec, query, a, "unknown");
history.putAction(query, AnswerValue.AV_REJECT);
ag.getComponent(HistoryComponent.class).getHistories().put(query.getSenderId(), history);
return true;
}
}
} else if (v instanceof ViewWithHistory) {
ViewWithHistory view = (ViewWithHistory) v;
history = ag.getComponent(HistoryComponent.class).getHistories().get(query.getSenderId());
if (history == null) {
history = new History();
ag.getComponent(HistoryComponent.class).getHistories().put(query.getSenderId(), history);
}
// check for all possible answers to the query, whether this answer would
// potentially reveal a secret and in that case, refuse to answer.
for (Secret a : conf.getSecrets()) {
// ans := true
if (cexec.scepticalInference(
view.RefineViewByQuery(query.getQuestion(), AnswerValue.AV_TRUE), a.getInformation())) {
this.sendRejectAnswer(ag, desire, cexec, query, a, "true");
history.putAction(query, AnswerValue.AV_REJECT);
ag.getComponent(HistoryComponent.class).getHistories().put(query.getSenderId(), history);
return true;
}
// ans := false
if (cexec.scepticalInference(
view.RefineViewByQuery(query.getQuestion(), AnswerValue.AV_FALSE),
a.getInformation())) {
this.sendRejectAnswer(ag, desire, cexec, query, a, "false");
history.putAction(query, AnswerValue.AV_REJECT);
ag.getComponent(HistoryComponent.class).getHistories().put(query.getSenderId(), history);
return true;
}
// ans := undef
if (cexec.scepticalInference(
view.RefineViewByQuery(query.getQuestion(), AnswerValue.AV_UNKNOWN),
a.getInformation())) {
this.sendRejectAnswer(ag, desire, cexec, query, a, "unknown");
history.putAction(query, AnswerValue.AV_REJECT);
ag.getComponent(HistoryComponent.class).getHistories().put(query.getSenderId(), history);
return true;
}
}
} else if (v instanceof BetterView) {
BetterView view = (BetterView) v;
// check for all possible answers to the query, whether this answer would
// potentially reveal a secret and in that case, refuse to answer.
for (Secret a : conf.getSecrets()) {
// ans := true
if (cexec.scepticalInference(
view.MentalRefineViewByQuery(query.getQuestion(), AnswerValue.AV_TRUE),
a.getInformation())) {
this.sendRejectAnswer(ag, desire, cexec, query, a, "true");
return true;
}
// ans := false
if (cexec.scepticalInference(
view.MentalRefineViewByQuery(query.getQuestion(), AnswerValue.AV_FALSE),
a.getInformation())) {
this.sendRejectAnswer(ag, desire, cexec, query, a, "false");
return true;
}
// ans := undef
if (cexec.scepticalInference(
view.MentalRefineViewByQuery(query.getQuestion(), AnswerValue.AV_UNKNOWN),
a.getInformation())) {
this.sendRejectAnswer(ag, desire, cexec, query, a, "unknown");
return true;
}
}
}
cexec.report(
"No answer to query '"
+ query.getQuestion()
+ " would reveal a secret. Start actual handling.");
// no secret will be revealed by any possible answer to the query.
// handle the query and create an appropriate answer action.
AngeronaAnswer answer = ag.getBeliefs().getWorldKnowledge().reason(query.getQuestion());
if (history != null) {
history.putAction(query, answer.getAnswerValue());
ag.getComponent(HistoryComponent.class).getHistories().put(query.getSenderId(), history);
}
ag.getBeliefs()
.getWorldKnowledge()
.report("Actual answer to query: " + answer.getAnswerValue());
Answer answerSpeechAct =
new Answer(ag, query.getSenderId(), query.getQuestion(), answer.getAnswerValue());
Subgoal answerGoal = new Subgoal(ag, desire);
answerGoal.newStack(answerSpeechAct);
ag.getPlanComponent().addPlan(answerGoal);
pp.report(
"Add the new action '" + Answer.class.getSimpleName() + "' to the plan",
ag.getPlanComponent());
return true;
}
