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package eu.dnetlib.pace.distance;
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import java.util.HashSet;
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import java.util.Map;
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import java.util.Set;
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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import com.google.common.base.Function;
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import com.google.common.base.Predicates;
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import com.google.common.collect.Iterables;
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import com.google.common.collect.Sets;
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import com.google.common.collect.Sets.SetView;
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import eu.dnetlib.pace.model.Field;
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import eu.dnetlib.pace.model.FieldListImpl;
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import eu.dnetlib.pace.model.gt.CoAuthor;
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import eu.dnetlib.pace.model.gt.CoAuthors;
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import eu.dnetlib.pace.model.gt.GTAuthor;
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public class PersonCoAuthorSurnamesDistance extends ConfigurableDistanceAlgo implements DistanceAlgo {
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/**
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* logger.
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*/
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private static final Log log = LogFactory.getLog(PersonCoAuthorSurnamesDistance.class); // NOPMD by marko on 11/24/08 5:02 PM
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public PersonCoAuthorSurnamesDistance(final Map<String, String> params, final double weight) {
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super(params, weight);
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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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final GTAuthor ga = Iterables.getOnlyElement(GTAuthor.fromOafJson(((FieldListImpl) a).stringList()));
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final GTAuthor gb = Iterables.getOnlyElement(GTAuthor.fromOafJson(((FieldListImpl) b).stringList()));
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final Integer commonSurnames = Integer.parseInt(getParams().get("common.surnames"));
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// log.info("min common surnames: " + commonSurnames);
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if (isEnabled(commonSurnames) && (surnamesInCommon(ga, gb).size() >= commonSurnames)) return 1.0;
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return 0;
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}
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private boolean isEnabled(final Integer property) {
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return (property != null) && (property >= 0);
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}
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private Set<String> surnamesInCommon(final GTAuthor a, final GTAuthor b) {
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final SetView<String> intersection = Sets.intersection(getSurnames(a.getCoAuthors()), getSurnames(b.getCoAuthors()));
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// log.info(String.format("surnames intersection '%s' - '%s': %s", a.getAuthor().getFullname(), b.getAuthor().getFullname(),
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// intersection.size()));
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return intersection;
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}
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private Set<String> getSurnames(final CoAuthors ca) {
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if ((ca == null) || ca.isEmpty()) return new HashSet<String>();
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return Sets.newHashSet(Iterables.filter(Iterables.transform(ca, new Function<CoAuthor, String>() {
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@Override
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public String apply(final CoAuthor c) {
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return c.getSecondnames();
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}
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}), Predicates.notNull()));
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}
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@Override
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public double getWeight() {
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return getWeigth();
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}
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}
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