forked from D-Net/dnet-hadoop
60 lines
1.4 KiB
Java
60 lines
1.4 KiB
Java
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package eu.dnetlib.pace.tree;
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import java.util.Map;
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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.wcohen.ss.AbstractStringDistance;
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import eu.dnetlib.pace.config.Config;
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import eu.dnetlib.pace.tree.support.AbstractStringComparator;
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import eu.dnetlib.pace.tree.support.ComparatorClass;
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@ComparatorClass("levensteinTitle")
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public class LevensteinTitle extends AbstractStringComparator {
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private static final Log log = LogFactory.getLog(LevensteinTitle.class);
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public LevensteinTitle(Map<String, String> params) {
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super(params, new com.wcohen.ss.Levenstein());
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}
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public LevensteinTitle(final double w) {
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super(w, new com.wcohen.ss.Levenstein());
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}
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protected LevensteinTitle(final double w, final AbstractStringDistance ssalgo) {
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super(w, ssalgo);
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}
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@Override
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public double distance(final String a, final String b, final Config conf) {
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final String ca = cleanup(a);
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final String cb = cleanup(b);
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final boolean check = checkNumbers(ca, cb);
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if (check)
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return 0.5;
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return normalize(ssalgo.score(ca, cb), ca.length(), cb.length());
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}
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private double normalize(final double score, final int la, final int lb) {
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return 1 - (Math.abs(score) / Math.max(la, lb));
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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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@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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