forked from D-Net/dnet-hadoop
39 lines
886 B
Java
39 lines
886 B
Java
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package eu.dnetlib.pace.clustering;
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import java.util.Collection;
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import java.util.List;
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import java.util.Map;
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import org.apache.commons.lang3.StringUtils;
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import com.google.common.collect.Lists;
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import com.google.common.collect.Sets;
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import eu.dnetlib.pace.config.Config;
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@ClusteringClass("lowercase")
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public class LowercaseClustering extends AbstractClusteringFunction {
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public LowercaseClustering(final Map<String, Integer> params) {
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super(params);
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}
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@Override
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public Collection<String> apply(Config conf, List<String> fields) {
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Collection<String> c = Sets.newLinkedHashSet();
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for (String f : fields) {
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c.addAll(doApply(conf, f));
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}
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return c;
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}
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@Override
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protected Collection<String> doApply(final Config conf, final String s) {
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if (StringUtils.isBlank(s)) {
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return Lists.newArrayList();
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}
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return Lists.newArrayList(s.toLowerCase().trim());
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}
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}
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