public Event getHistory(TrainerEvent trainerEvent, int backOffLevel) {
ModifierEvent modEvent = (ModifierEvent) trainerEvent;
if (Language.treebank().isBaseNP(modEvent.parent()))
return getBaseNPHistory(modEvent, backOffLevel);
Symbol side = Constants.sideToSym(modEvent.side());
MutableEvent hist = historiesWithSubcats[backOffLevel];
hist.clear();
Symbol verbInterveningSym = Constants.booleanToSym(modEvent.verbIntervening());
Symbol mappedPrevModSym = NTMapper.map(modEvent.previousMods().symbolAt(0));
Symbol parent = Language.training().removeArgAugmentation(modEvent.parent());
switch (backOffLevel) {
case 0:
// for p(M(t)_i | P, H, w, t, verbIntervening, map(M_i-1), subcat, side)
hist.add(0, parent);
hist.add(0, Language.training().removeGapAugmentation(modEvent.head()));
hist.add(0, modEvent.headWord().word());
hist.add(0, modEvent.headWord().tag());
hist.add(0, verbInterveningSym);
hist.add(0, mappedPrevModSym);
hist.add(1, modEvent.subcat());
hist.add(0, side);
break;
case 1:
// for p(M(t)_i | P, H, t, verbIntervening, map(M_i-1), subcat, side)
hist.add(0, parent);
hist.add(0, Language.training().removeGapAugmentation(modEvent.head()));
hist.add(0, modEvent.headWord().tag());
hist.add(0, verbInterveningSym);
hist.add(0, mappedPrevModSym);
hist.add(1, modEvent.subcat());
hist.add(0, side);
break;
case 2:
// for p(M(t)_i | P, H, verbIntervening, map(M_i-1), subcat, side)
hist.add(0, parent);
hist.add(0, Language.training().removeGapAugmentation(modEvent.head()));
hist.add(0, verbInterveningSym);
hist.add(0, mappedPrevModSym);
hist.add(1, modEvent.subcat());
hist.add(0, side);
break;
case 3:
// for p(M(t)_i | P, subcat)
hist.add(0, parent);
hist.add(1, modEvent.subcat());
break;
}
return hist;
}
private Event getBaseNPHistory(ModifierEvent modEvent, int backOffLevel) {
MutableEvent hist = histories[backOffLevel];
Symbol side = Constants.sideToSym(modEvent.side());
Symbol prevModLabel =
(modEvent.previousMods().get(0) == startSym
? modEvent.head()
: modEvent.previousMods().symbolAt(0));
Word prevModWord =
(modEvent.previousWords().getWord(0).equals(startWord)
? modEvent.headWord()
: modEvent.previousWords().getWord(0));
hist.clear();
switch (backOffLevel) {
case 0:
// for p(t_i | M_i, P, M(w,t)_i-1, side)
hist.add(modEvent.modifier());
hist.add(Language.training().removeGapAugmentation(modEvent.parent()));
hist.add(prevModLabel);
hist.add(prevModWord.word());
hist.add(prevModWord.tag());
hist.add(side);
break;
case 1:
// for p(t_i | M_i, P, M(t)_i-1, side)
hist.add(modEvent.modifier());
hist.add(Language.training().removeGapAugmentation(modEvent.parent()));
hist.add(prevModLabel);
hist.add(prevModWord.tag());
hist.add(side);
break;
case 2:
// for p(t_i | M_i, P, M_i-1, side)
hist.add(modEvent.modifier());
hist.add(Language.training().removeGapAugmentation(modEvent.parent()));
hist.add(prevModLabel);
hist.add(side);
break;
/*
case 3:
// for p(t_i | M_i, P)
hist.add(modEvent.modifier());
hist.add(Language.training().removeGapAugmentation(modEvent.parent()));
break;
*/
}
return hist;
}