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package eu.dnetlib.pace.distance.algo;
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import eu.dnetlib.pace.distance.SecondStringDistanceAlgo;
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import org.apache.commons.lang.StringUtils;
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import com.wcohen.ss.AbstractStringDistance;
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import eu.dnetlib.pace.config.Type;
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import eu.dnetlib.pace.model.Field;
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/**
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* The Class SubStringLevenstein.
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*/
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public class SubStringLevenstein extends SecondStringDistanceAlgo {
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/** The limit. */
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protected int limit;
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/**
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* Instantiates a new sub string levenstein.
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*
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* @param w
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* the w
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*/
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public SubStringLevenstein(final double w) {
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super(w, new com.wcohen.ss.Levenstein());
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}
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/**
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* Instantiates a new sub string levenstein.
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*
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* @param w
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* the w
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* @param limit
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* the limit
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*/
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public SubStringLevenstein(final double w, final int limit) {
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super(w, new com.wcohen.ss.Levenstein());
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this.limit = limit;
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}
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/**
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* Instantiates a new sub string levenstein.
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*
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* @param w
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* the w
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* @param limit
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* the limit
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* @param ssalgo
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* the ssalgo
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*/
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protected SubStringLevenstein(final double w, final int limit, final AbstractStringDistance ssalgo) {
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super(w, ssalgo);
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this.limit = limit;
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}
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/*
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* (non-Javadoc)
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*
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* @see eu.dnetlib.pace.distance.SecondStringDistanceAlgo#distance(eu.dnetlib.pace.model.Field, eu.dnetlib.pace.model.Field)
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*/
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@Override
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public double distance(final Field a, final Field b) {
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if (a.getType().equals(Type.String) && b.getType().equals(Type.String))
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return distance(StringUtils.left(a.stringValue(), limit), StringUtils.left(b.stringValue(), limit));
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throw new IllegalArgumentException("invalid types\n- A: " + a.toString() + "\n- B: " + b.toString());
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}
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/*
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* (non-Javadoc)
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*
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* @see eu.dnetlib.pace.distance.DistanceAlgo#getWeight()
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*/
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@Override
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public double getWeight() {
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return super.weight;
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}
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/*
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* (non-Javadoc)
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*
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* @see eu.dnetlib.pace.distance.SecondStringDistanceAlgo#normalize(double)
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*/
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@Override
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protected double normalize(final double d) {
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return 1 / Math.pow(Math.abs(d) + 1, 0.1);
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}
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}
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