simplenlg.aggregation.NewAggregator Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of SimpleNLG Show documentation
Java API for Natural Language Generation
The newest version!
/*
 * The contents of this file are subject to the Mozilla Public License
 * Version 2.0 (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License at
 * https://www.mozilla.org/en-US/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS"
 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
 * License for the specific language governing rights and limitations
 * under the License.
 *
 * The Original Code is "Simplenlg".
 *
 * The Initial Developer of the Original Code is Ehud Reiter, Albert Gatt and Dave Westwater.
 * Portions created by Ehud Reiter, Albert Gatt and Dave Westwater are Copyright (C) 2010-11 The University of Aberdeen. All Rights Reserved.
 *
 * Contributor(s): Ehud Reiter, Albert Gatt, Dave Westwater, Roman Kutlak, Margaret Mitchell, and Saad Mahamood.
 */
package simplenlg.aggregation;

import java.util.List;

import simplenlg.framework.*;
import simplenlg.syntax.english.SyntaxProcessor;

public class NewAggregator extends NLGModule {

	private SyntaxProcessor _syntax;
	private NLGFactory      _factory;

	public NewAggregator() {

	}

	public void initialise() {
		this._syntax = new SyntaxProcessor();
		this._factory = new NLGFactory();
	}

	@Override
	public List realise(List elements) {
		// TODO Auto-generated method stub
		return null;
	}

	@Override
	public NLGElement realise(NLGElement element) {
		// TODO Auto-generated method stub
		return null;
	}

	public NLGElement realise(NLGElement phrase1, NLGElement phrase2) {
		NLGElement result = null;

		if(phrase1 instanceof PhraseElement && phrase2 instanceof PhraseElement
		   && phrase1.getCategory() == PhraseCategory.CLAUSE && phrase2.getCategory() == PhraseCategory.CLAUSE) {

			List funcSets = AggregationHelper.collectFunctionalPairs(this._syntax.realise(phrase1),
			                                                                        this._syntax.realise(phrase2));

			applyForwardConjunctionReduction(funcSets);
			applyBackwardConjunctionReduction(funcSets);
			result = this._factory.createCoordinatedPhrase(phrase1, phrase2);
		}

		return result;
	}

	// private void applyGapping(List funcPairs) {
	//
	// }

	private void applyForwardConjunctionReduction(List funcSets) {

		for(FunctionalSet pair : funcSets) {
			if(pair.getPeriphery() == Periphery.LEFT && pair.formIdentical()) {
				pair.elideRightMost();
			}
		}

	}

	private void applyBackwardConjunctionReduction(List funcSets) {
		for(FunctionalSet pair : funcSets) {
			if(pair.getPeriphery() == Periphery.RIGHT && pair.formIdentical()) {
				pair.elideLeftMost();
			}
		}
	}

}