/**
* Grabs the head verb of the verb phrase and sets it to future tense if the
* phrase is future tense. It also turns off negation if the group has a
* modal.
*
* @param phrase
* the <code>PhraseElement</code> representing this noun phrase.
* @param tenseValue
* the <code>Tense</code> of the phrase.
* @param hasModal
* <code>true</code> if the verb phrase has a modal.
* @return the modified head element
*/
private static INLGElement grabHeadVerb(PhraseElement phrase,
Tense tenseValue, bool hasModal)
{
INLGElement frontVG = phrase.getHead();
if (frontVG != null)
{
if (frontVG is WordElement)
{
frontVG = new InflectedWordElement((WordElement)frontVG);
}
frontVG.setFeature(Feature.TENSE.ToString(), tenseValue);
// if (Tense.FUTURE.Equals(tenseValue) && frontVG != null) {
// frontVG.setFeature(Feature.TENSE, Tense.FUTURE);
// }
if (hasModal)
{
frontVG.setFeature(Feature.NEGATED.ToString(), false);
}
}
return(frontVG);
}
/**
* Realises the head noun of the noun phrase.
*
* @param phrase
* the <code>PhraseElement</code> representing this noun phrase.
* @param parent
* the parent <code>SyntaxProcessor</code> that will do the
* realisation of the complementiser.
* @param realisedElement
* the current realisation of the noun phrase.
*/
private static void realiseHeadNoun(PhraseElement phrase,
SyntaxProcessor parent, ListElement realisedElement)
{
INLGElement headElement = phrase.getHead();
if (headElement != null)
{
headElement.setFeature(Feature.ELIDED.ToString(), phrase
.getFeature(Feature.ELIDED.ToString()));
headElement.setFeature(LexicalFeature.GENDER, phrase
.getFeature(LexicalFeature.GENDER));
headElement.setFeature(InternalFeature.ACRONYM.ToString(), phrase
.getFeature(InternalFeature.ACRONYM.ToString()));
headElement.setFeature(Feature.NUMBER.ToString(), phrase
.getFeature(Feature.NUMBER.ToString()));
headElement.setFeature(Feature.PERSON.ToString(), phrase
.getFeature(Feature.PERSON.ToString()));
headElement.setFeature(Feature.POSSESSIVE.ToString(), phrase
.getFeature(Feature.POSSESSIVE.ToString()));
headElement.setFeature(Feature.PASSIVE.ToString(), phrase
.getFeature(Feature.PASSIVE.ToString()));
var currentElement = parent.realise(headElement);
currentElement.setFeature(InternalFeature.DISCOURSE_FUNCTION.ToString(),
DiscourseFunction.SUBJECT);
realisedElement.addComponent(currentElement);
}
}
/**
* Pushes the front verb onto the stack of verb components.
*
* @param phrase
* the <code>PhraseElement</code> representing this noun phrase.
* @param vgComponents
* the stack of verb components in the verb group.
* @param frontVG
* the first verb in the verb group.
* @param formValue
* the <code>Form</code> of the phrase.
* @param interrogative
* <code>true</code> if the phrase is interrogative.
*/
private static void pushFrontVerb(PhraseElement phrase,
Stack <INLGElement> vgComponents, INLGElement frontVG,
object formValue, bool interrogative)
{
var interrogType = phrase.getFeature(Feature.INTERROGATIVE_TYPE.ToString());
if (Form.GERUND.Equals(formValue))
{
frontVG.setFeature(Feature.FORM.ToString(), Form.PRESENT_PARTICIPLE);
vgComponents.push(frontVG);
}
else if (Form.PAST_PARTICIPLE.Equals(formValue))
{
frontVG.setFeature(Feature.FORM.ToString(), Form.PAST_PARTICIPLE);
vgComponents.push(frontVG);
}
else if (Form.PRESENT_PARTICIPLE.Equals(formValue))
{
frontVG.setFeature(Feature.FORM.ToString(), Form.PRESENT_PARTICIPLE);
vgComponents.push(frontVG);
}
else if ((!(formValue == null || Form.NORMAL.Equals(formValue)) || interrogative) &&
!isCopular(phrase.getHead()) && vgComponents.isEmpty())
{
// AG: fix below: if interrogative, only set non-morph feature in
// case it's not WHO_SUBJECT OR WHAT_SUBJECT
if (!(InterrogativeType.WHO_SUBJECT.Equals(interrogType) || InterrogativeType.WHAT_SUBJECT
.Equals(interrogType)))
{
frontVG.setFeature(InternalFeature.NON_MORPH.ToString(), true);
}
vgComponents.push(frontVG);
}
else
{
var numToUse = determineNumber(phrase.getParent(),
phrase);
frontVG.setFeature(Feature.TENSE.ToString(), phrase.getFeatureTense(Feature.TENSE.ToString()));
frontVG.setFeature(Feature.PERSON.ToString(), phrase
.getFeature(Feature.PERSON.ToString()));
frontVG.setFeature(Feature.NUMBER.ToString(), numToUse);
//don't push the front VG if it's a negated interrogative WH object question
if (!(phrase.getFeatureAsBoolean(Feature.NEGATED.ToString()) && (InterrogativeType.WHO_OBJECT
.Equals(interrogType) ||
InterrogativeType.WHAT_OBJECT
.Equals(interrogType))))
{
vgComponents.push(frontVG);
}
}
}
/**
* The main method for realising verb phrases.
*
* @param parent
* the <code>SyntaxProcessor</code> that called this method.
* @param phrase
* the <code>PhraseElement</code> to be realised.
* @return the realised <code>NLGElement</code>.
*/
public static INLGElement realise(SyntaxProcessor parent, PhraseElement phrase)
{
ListElement realisedElement = null;
var mainVerbRealisation = new Stack <INLGElement>();
var auxiliaryRealisation = new Stack <INLGElement>();
if (phrase != null)
{
var vgComponents = createVerbGroup(parent, phrase);
splitVerbGroup(vgComponents, mainVerbRealisation,
auxiliaryRealisation);
realisedElement = new ListElement();
if (!phrase.hasFeature(InternalFeature.REALISE_AUXILIARY.ToString()) ||
phrase.getFeatureAsBoolean(
InternalFeature.REALISE_AUXILIARY.ToString()))
{
realiseAuxiliaries(parent, realisedElement,
auxiliaryRealisation);
PhraseHelper.realiseList(parent, realisedElement, phrase
.getPreModifiers(), DiscourseFunction.PRE_MODIFIER);
realiseMainVerb(parent, phrase, mainVerbRealisation,
realisedElement);
}
else if (isCopular(phrase.getHead()))
{
realiseMainVerb(parent, phrase, mainVerbRealisation,
realisedElement);
PhraseHelper.realiseList(parent, realisedElement, phrase
.getPreModifiers(), DiscourseFunction.PRE_MODIFIER);
}
else
{
PhraseHelper.realiseList(parent, realisedElement, phrase
.getPreModifiers(), DiscourseFunction.PRE_MODIFIER);
realiseMainVerb(parent, phrase, mainVerbRealisation,
realisedElement);
}
realiseComplements(parent, phrase, realisedElement);
PhraseHelper.realiseList(parent, realisedElement, phrase
.getPostModifiers(), DiscourseFunction.POST_MODIFIER);
}
return(realisedElement);
}
/**
* Determines the number agreement for the phrase ensuring that any number
* agreement on the parent element is inherited by the phrase.
*
* @param parent
* the parent element of the phrase.
* @param phrase
* the <code>PhraseElement</code> representing this noun phrase.
* @return the <code>NumberAgreement</code> to be used for the phrase.
*/
private static NumberAgreement determineNumber(INLGElement parent,
PhraseElement phrase)
{
var numberValue = phrase.getFeature(Feature.NUMBER.ToString());
NumberAgreement number;
if (numberValue != null && numberValue is NumberAgreement)
{
number = (NumberAgreement)numberValue;
}
else
{
number = NumberAgreement.SINGULAR;
}
// Ehud Reiter = modified below to force number from VP for WHAT_SUBJECT
// and WHO_SUBJECT interrogatuves
if (parent is PhraseElement)
{
if (parent.isA(PhraseCategoryEnum.CLAUSE) &&
(PhraseHelper.isExpletiveSubject((PhraseElement)parent) ||
InterrogativeType.WHO_SUBJECT.Equals(parent
.getFeature(Feature.INTERROGATIVE_TYPE.ToString())) || InterrogativeType.WHAT_SUBJECT
.Equals(parent
.getFeature(Feature.INTERROGATIVE_TYPE.ToString()))) &&
isCopular(phrase.getHead()))
{
if (hasPluralComplement(phrase
.getFeatureAsElementList(InternalFeature.COMPLEMENTS.ToString())))
{
number = NumberAgreement.PLURAL;
}
else
{
number = NumberAgreement.SINGULAR;
}
}
}
return(number);
}
/**
* Realises the head element of the phrase.
*
* @param parent
* the parent <code>SyntaxProcessor</code> that will do the
* realisation of the complementiser.
* @param phrase
* the <code>PhraseElement</code> representing this noun phrase.
* @param realisedElement
* the current realisation of the noun phrase.
*/
private static void realiseHead(SyntaxProcessor parent,
PhraseElement phrase, ListElement realisedElement)
{
INLGElement head = phrase.getHead();
if (head != null)
{
if (phrase.hasFeature(Feature.IS_COMPARATIVE.ToString()))
{
head.setFeature(Feature.IS_COMPARATIVE.ToString(), phrase
.getFeature(Feature.IS_COMPARATIVE.ToString()));
}
else if (phrase.hasFeature(Feature.IS_SUPERLATIVE.ToString()))
{
head.setFeature(Feature.IS_SUPERLATIVE.ToString(), phrase
.getFeature(Feature.IS_SUPERLATIVE.ToString()));
}
head = parent.realise(head);
head.setFeature(InternalFeature.DISCOURSE_FUNCTION.ToString(),
DiscourseFunction.HEAD.ToString());
realisedElement.addComponent(head);
}
}
/**
* The main method for controlling the syntax realisation of clauses.
*
* @param parent
* the parent <code>SyntaxProcessor</code> that called this
* method.
* @param phrase
* the <code>PhraseElement</code> representation of the clause.
* @return the <code>NLGElement</code> representing the realised clause.
*/
public static INLGElement realise(SyntaxProcessor parent, PhraseElement phrase)
{
ListElement realisedElement = null;
var phraseFactory = phrase.getFactory();
INLGElement splitVerb = null;
var interrogObj = false;
if (phrase != null)
{
realisedElement = new ListElement();
var verbElement = phrase.getFeatureAsElement(InternalFeature.VERB_PHRASE.ToString());
if (verbElement == null)
{
verbElement = phrase.getHead();
}
checkSubjectNumberPerson(phrase, verbElement);
checkDiscourseFunction(phrase);
copyFrontModifiers(phrase, verbElement);
addComplementiser(phrase, parent, realisedElement);
addCuePhrase(phrase, parent, realisedElement);
if (phrase.hasFeature(Feature.INTERROGATIVE_TYPE.ToString()))
{
var inter = phrase.getFeature(Feature.INTERROGATIVE_TYPE.ToString());
interrogObj = (InterrogativeType.WHAT_OBJECT.Equals(inter) ||
InterrogativeType.WHO_OBJECT.Equals(inter) ||
InterrogativeType.HOW_PREDICATE.Equals(inter) ||
InterrogativeType.HOW.Equals(inter) ||
InterrogativeType.WHY.Equals(inter) || InterrogativeType.WHERE.Equals(inter));
splitVerb = realiseInterrogative(phrase, parent, realisedElement, phraseFactory, verbElement);
}
else
{
PhraseHelper.realiseList(parent,
realisedElement,
phrase.getFeatureAsElementList(InternalFeature.FRONT_MODIFIERS.ToString()),
DiscourseFunction.FRONT_MODIFIER);
}
addSubjectsToFront(phrase, parent, realisedElement, splitVerb);
var passiveSplitVerb = addPassiveComplementsNumberPerson(phrase,
parent,
realisedElement,
verbElement);
if (passiveSplitVerb != null)
{
splitVerb = passiveSplitVerb;
}
// realise verb needs to know if clause is object interrogative
realiseVerb(phrase, parent, realisedElement, splitVerb, verbElement, interrogObj);
addPassiveSubjects(phrase, parent, realisedElement, phraseFactory);
addInterrogativeFrontModifiers(phrase, parent, realisedElement);
addEndingTo(phrase, parent, realisedElement, phraseFactory);
}
return(realisedElement);
}
/**
* Creates a stack of verbs for the verb phrase. Additional auxiliary verbs
* are added as required based on the features of the verb phrase.
*
* @param parent
* the parent <code>SyntaxProcessor</code> that will do the
* realisation of the complementiser.
* @param phrase
* the <code>PhraseElement</code> representing this noun phrase.
* @return the verb group as a <code>Stack</code> of <code>NLGElement</code>
* s.
*/
public static Stack <INLGElement> createVerbGroup(
SyntaxProcessor parent, PhraseElement phrase)
{
string actualModal = null;
var formValue = phrase.getFeature(Feature.FORM.ToString());
Tense tenseValue = phrase.getFeatureTense(Feature.TENSE.ToString());
var modal = phrase.getFeatureAsString(Feature.MODAL.ToString());
var modalPast = false;
var vgComponents = new Stack <INLGElement>();
var interrogative = phrase.hasFeature(Feature.INTERROGATIVE_TYPE.ToString());
if (Form.GERUND.Equals(formValue) || Form.INFINITIVE.Equals(formValue))
{
tenseValue = Tense.PRESENT;
}
if (Form.INFINITIVE.Equals(formValue))
{
actualModal = "to";
}
else if (formValue == null || Form.NORMAL.Equals(formValue))
{
if (Tense.FUTURE.Equals(tenseValue) &&
modal == null &&
((!(phrase.getHead() is CoordinatedPhraseElement)) || (phrase
.getHead() is CoordinatedPhraseElement &&
interrogative)))
{
actualModal = "will";
}
else if (modal != null)
{
actualModal = modal;
if (Tense.PAST.Equals(tenseValue))
{
modalPast = true;
}
}
}
pushParticles(phrase, parent, vgComponents);
var frontVG = grabHeadVerb(phrase, tenseValue, modal != null);
checkImperativeInfinitive(formValue, frontVG);
if (phrase.getFeatureAsBoolean(Feature.PASSIVE.ToString()))
{
frontVG = addBe(frontVG, vgComponents, Form.PAST_PARTICIPLE);
}
if (phrase.getFeatureAsBoolean(Feature.PROGRESSIVE.ToString()))
{
frontVG = addBe(frontVG, vgComponents, Form.PRESENT_PARTICIPLE);
}
if (phrase.getFeatureAsBoolean(Feature.PERFECT.ToString()) ||
modalPast)
{
frontVG = addHave(frontVG, vgComponents, modal, tenseValue);
}
frontVG = pushIfModal(actualModal != null, phrase, frontVG,
vgComponents);
frontVG = createNot(phrase, vgComponents, frontVG, modal != null);
if (frontVG != null)
{
pushFrontVerb(phrase, vgComponents, frontVG, formValue,
interrogative);
}
pushModal(actualModal, phrase, vgComponents);
return(vgComponents);
}