D-Net

package eu.dnetlib.pace.distance.algo;

import eu.dnetlib.pace.distance.ConfigurableDistanceAlgo;

import eu.dnetlib.pace.distance.DistanceAlgo;

import eu.dnetlib.pace.model.Field;

import java.net.MalformedURLException;

import java.net.URL;

import java.util.Map;

public class UrlMatcher extends ConfigurableDistanceAlgo implements DistanceAlgo {

    public UrlMatcher(Map<String, String> params, double weight) {

        super(params, weight);

    }

    @Override

    public double distance(Field a, Field b) {

        final URL urlA = asUrl(getFirstValue(a));

        final URL urlB = asUrl(getFirstValue(b));

        return urlA.getHost().equalsIgnoreCase(urlB.getHost()) ? 1.0 : 0.0;

    }

    private URL asUrl(final String value) {

        try {

            return new URL(value);

        } catch (MalformedURLException e) {

            // should not happen as checked by pace typing

            throw new IllegalStateException("invalid URL: " + value);

        }

    }

    @Override

    public double getWeight() {

        return super.getWeigth();

    }

}