WordEditUnit.java

package ruc.irm.similarity.sentence.editdistance;

import ruc.irm.similarity.sentence.SegmentProxy.Word;
import ruc.irm.similarity.word.hownet2.concept.XiaConceptParser;

public class WordEditUnit extends EditUnit {
	private Word word = null;
	
	public WordEditUnit(Word word){
		this.word = word;
	}
		
	public String getUnitString() {
		return word.getWord();
	}
	
	/**
	 * 根据此语的相似度获取替换代价
	 */
	@Override
	public double getSubstitutionCost(EditUnit otherUnit){
		if(!(otherUnit instanceof WordEditUnit)) return 1.0;
		if(equals(otherUnit)) return 0.0;
		
		WordEditUnit other = (WordEditUnit)otherUnit;
		//词性不同，直接返回1.0
		if(word.getPos()!=other.word.getPos()){
			return 1.0;
		}
		return 1 - XiaConceptParser.getInstance().getSimilarity(getUnitString(), other.getUnitString());
	}
	
	@Override
	public boolean equals(Object other){
    	if(!(other instanceof WordEditUnit)) return false;
    	WordEditUnit otherUnit = (WordEditUnit)other;
    	Word otherWord = otherUnit.word;
    	//词性不同，直接返回1.0
		if(word.getPos()!=otherWord.getPos()){
			return false;
		}
		double sim = XiaConceptParser.getInstance().getSimilarity(getUnitString(), otherUnit.getUnitString());
		return sim>0.85;
	}
}