forked from D-Net/dnet-hadoop
47 lines
1.1 KiB
Java
47 lines
1.1 KiB
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.HashSet;
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import java.util.List;
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import java.util.Map;
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import java.util.stream.Collectors;
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import org.apache.commons.lang3.StringUtils;
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import eu.dnetlib.pace.common.AbstractPaceFunctions;
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import eu.dnetlib.pace.config.Config;
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public abstract class AbstractClusteringFunction extends AbstractPaceFunctions implements ClusteringFunction {
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protected Map<String, Integer> params;
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public AbstractClusteringFunction(final Map<String, Integer> params) {
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this.params = params;
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}
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protected abstract Collection<String> doApply(Config conf, String s);
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@Override
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public Collection<String> apply(Config conf, List<String> fields) {
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return fields
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.stream()
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.filter(f -> !f.isEmpty())
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.map(this::normalize)
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.map(s -> filterAllStopWords(s))
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.map(s -> doApply(conf, s))
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.map(c -> filterBlacklisted(c, ngramBlacklist))
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.flatMap(c -> c.stream())
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.filter(StringUtils::isNotBlank)
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.collect(Collectors.toCollection(HashSet::new));
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}
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public Map<String, Integer> getParams() {
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return params;
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}
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protected Integer param(String name) {
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return params.get(name);
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}
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}
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