D-Net

package eu.dnetlib.pace.clustering;

import java.util.Collection;

import java.util.List;

import java.util.Map;

import com.google.common.collect.Lists;

import com.google.common.collect.Sets;

import eu.dnetlib.pace.model.Field;

import org.apache.commons.lang.StringUtils;

public class LowercaseClustering extends AbstractClusteringFunction {

	public LowercaseClustering(final Map<String, Integer> params) {

		super(params);

	}

	@Override

	public Collection<String> apply(List<Field> fields) {

		Collection<String> c = Sets.newLinkedHashSet();

		for(Field f : fields) {

			c.addAll(doApply(f.stringValue()));

		}

		return c;

	}

	@Override

	protected Collection<String> doApply(final String s) {

		if(StringUtils.isBlank(s)) {

			return Lists.newArrayList();

		}

		return Lists.newArrayList(s.toLowerCase().trim());

	}

}