package eu.dnetlib.pace.tree;

import java.util.Map;

import eu.dnetlib.pace.config.Config;
import eu.dnetlib.pace.tree.support.AbstractStringComparator;
import eu.dnetlib.pace.tree.support.ComparatorClass;

@ComparatorClass("numbersMatch")
public class NumbersMatch extends AbstractStringComparator {

	public NumbersMatch(Map<String, String> params) {
		super(params);
	}

	@Override
	public double distance(String a, String b, Config conf) {

		// extracts numbers from the field
		String numbers1 = getNumbers(nfd(a));
		String numbers2 = getNumbers(nfd(b));

		if (numbers1.isEmpty() && numbers2.isEmpty())
			return 1.0;

		if (numbers1.isEmpty() || numbers2.isEmpty())
			return -1.0;

		if (numbers1.equals(numbers2))
			return 1.0;

		return 0.0;
	}
}