Examples of NLGElement

simplenlg.framework.NLGElement

NLGElement is the base class that all elements extend from. This is abstract and cannot therefore be instantiated itself. The additional element classes should be used to correctly identify the type of element required.

Realisation in SimpleNLG revolves around a tree structure. Each node in the tree is represented by a NLGElement, which in turn may have child nodes. The job of the processors is to replace various types of elements with other elements. The eventual goal, once all the processors have been run, is to produce a single string element representing the final realisation.

The features are stored in a Map of String (the feature name) and Object (the value of the feature).
@author D. Westwater, University of Aberdeen. @version 4.0

Examples of simplenlg.framework.NLGElement

        }
      }
    }


    pushParticles(phrase, parent, vgComponents);
    NLGElement frontVG = grabHeadVerb(phrase, tenseValue, modal != null);
    checkImperativeInfinitive(formValue, frontVG);


    if (phrase.getFeatureAsBoolean(Feature.PASSIVE).booleanValue()) {
      frontVG = addBe(frontVG, vgComponents, Form.PAST_PARTICIPLE);
    }

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Examples of simplenlg.framework.NLGElement

   *            the phrase has a modal
   * @return the new element for the front of the group.
   */
  private static NLGElement createNot(PhraseElement phrase,
      Stack<NLGElement> vgComponents, NLGElement frontVG, boolean hasModal) {
    NLGElement newFront = frontVG;


    if (phrase.getFeatureAsBoolean(Feature.NEGATED).booleanValue()) {
      NLGFactory factory = phrase.getFactory();


      if (!vgComponents.empty() || frontVG != null && isCopular(frontVG)) {

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Examples of simplenlg.framework.NLGElement

   */
  private static NLGElement pushIfModal(boolean hasModal,
      PhraseElement phrase, NLGElement frontVG,
      Stack<NLGElement> vgComponents) {


    NLGElement newFront = frontVG;
    if (hasModal
        && !phrase.getFeatureAsBoolean(InternalFeature.IGNORE_MODAL)
            .booleanValue()) {
      if (frontVG != null) {
        frontVG.setFeature(InternalFeature.NON_MORPH, true);

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Examples of simplenlg.framework.NLGElement

   *            the <code>Tense</code> of the phrase.
   * @return the new element for the front of the group.
   */
  private static NLGElement addHave(NLGElement frontVG,
      Stack<NLGElement> vgComponents, String modal, Tense tenseValue) {
    NLGElement newFront = frontVG;


    if (frontVG != null) {
      frontVG.setFeature(Feature.FORM, Form.PAST_PARTICIPLE);
      vgComponents.push(frontVG);
    }
    newFront = new InflectedWordElement("have", LexicalCategory.VERB); //$NON-NLS-1$
    newFront.setFeature(Feature.TENSE, tenseValue);
    if (modal != null) {
      newFront.setFeature(InternalFeature.NON_MORPH, true);
    }
    return newFront;
  }

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Examples of simplenlg.framework.NLGElement

   *            <code>true</code> if the verb phrase has a modal.
   * @return the modified head element
   */
  private static NLGElement grabHeadVerb(PhraseElement phrase,
      Tense tenseValue, boolean hasModal) {
    NLGElement frontVG = phrase.getHead();


    if (frontVG != null) {
      if (frontVG instanceof WordElement) {
        frontVG = new InflectedWordElement((WordElement) frontVG);
      }


      //AG: tense value should always be set on frontVG 
      if (tenseValue != null) {
        frontVG.setFeature(Feature.TENSE, tenseValue);
      }


      // if (Tense.FUTURE.equals(tenseValue) && frontVG != null) {
      // frontVG.setFeature(Feature.TENSE, Tense.FUTURE);
      // }


      if (hasModal) {
        frontVG.setFeature(Feature.NEGATED, false);
      }
    }


    return frontVG;
  }

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Examples of simplenlg.framework.NLGElement

   * @return <code>true</code> if any of the complements are plural.
   */
  private static boolean hasPluralComplement(List<NLGElement> complements) {
    boolean plural = false;
    Iterator<NLGElement> complementIterator = complements.iterator();
    NLGElement eachComplement = null;
    Object numberValue = null;


    while (complementIterator.hasNext() && !plural) {
      eachComplement = complementIterator.next();


      if (eachComplement != null
          && eachComplement.isA(PhraseCategory.NOUN_PHRASE)) {


        numberValue = eachComplement.getFeature(Feature.NUMBER);
        if (numberValue != null
            && NumberAgreement.PLURAL.equals(numberValue)) {
          plural = true;
        }
      }

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Examples of simplenlg.framework.NLGElement

      copular = "be".equalsIgnoreCase(((WordElement) element) //$NON-NLS-1$
          .getBaseForm());


    } else if (element instanceof PhraseElement) {
      // get the head and check if it's "be"
      NLGElement head = element instanceof SPhraseSpec ? ((SPhraseSpec) element)
          .getVerb()
          : ((PhraseElement) element).getHead();


      if (head != null) {
        copular = (head instanceof WordElement && "be"

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Examples of simplenlg.framework.NLGElement

   * is a coordinated phrase, whose children can be further aggregated.
   * 
   */
  @Override
  public NLGElement realise(NLGElement element) {
    NLGElement result = element;


    for (AggregationRule rule : this._rules) {
      NLGElement intermediate = rule.apply(result);


      if (intermediate != null) {
        result = intermediate;
      }
    }

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Examples of simplenlg.framework.NLGElement

    // Do nothing
  }


  @Override
  public NLGElement realise(NLGElement element) {
    NLGElement realisedElement = null;


    if (element != null
        && !element.getFeatureAsBoolean(Feature.ELIDED).booleanValue()) {


      if (element instanceof DocumentElement) {

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Examples of simplenlg.framework.NLGElement

  }


  @Override
  public List<NLGElement> realise(List<NLGElement> elements) {
    List<NLGElement> realisedList = new ArrayList<NLGElement>();
    NLGElement childRealisation = null;


    if (elements != null) {
      for (NLGElement eachElement : elements) {
        if (eachElement != null) {
          childRealisation = realise(eachElement);

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