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package eu.dnetlib.data.mapreduce.hbase.openorgs;
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import java.io.IOException;
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import java.util.ArrayList;
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import java.util.List;
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import org.apache.commons.lang3.StringUtils;
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import org.apache.hadoop.hbase.io.ImmutableBytesWritable;
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import org.apache.hadoop.io.NullWritable;
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import org.apache.hadoop.io.Text;
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import org.apache.hadoop.mapreduce.Reducer;
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import com.google.protobuf.InvalidProtocolBufferException;
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import eu.dnetlib.data.proto.OafProtos.Oaf;
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import eu.dnetlib.data.proto.OafProtos.OafEntity;
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public class GenerateSimilaritiesReducer extends Reducer<ImmutableBytesWritable, ImmutableBytesWritable, NullWritable, Text> {
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private final Text valueOut = new Text();
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@Override
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protected void reduce(final ImmutableBytesWritable key, final Iterable<ImmutableBytesWritable> values, final Context context)
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throws IOException, InterruptedException {
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try {
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final List<OafEntity> list = new ArrayList<>();
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for (final ImmutableBytesWritable ibw : values) {
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list.add(Oaf.parseFrom(ibw.get()).getEntity());
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}
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if (list.size() < 2) { return; }
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if (reduceUsingId(OpenOrgsCommon.OPENORGS_MAIN_PREFIX, list, context)
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|| reduceUsingId(OpenOrgsCommon.OPENORGS_CORDA_FP7_PREFIX, list, context)
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|| reduceUsingId(OpenOrgsCommon.OPENORGS_CORDA_H2020_PREFIX, list, context)
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|| reduceUsingId("20|", list, context)) {
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// NOHING TODO
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}
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} catch (final InvalidProtocolBufferException e) {
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e.printStackTrace();
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throw new RuntimeException(e);
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}
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}
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private boolean reduceUsingId(final String idPrefix, final List<OafEntity> list, final Context context) {
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final String mainId = findMainId(idPrefix, list);
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if (StringUtils.isNotBlank(mainId)) {
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for (final OafEntity o : list) {
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if (!o.getId().equals(mainId)) {
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context.getCounter("organization", "relations to " + idPrefix + "*").increment(1);
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emit(newSimilarity(mainId, o), context);
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}
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}
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return true;
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}
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return false;
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}
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private String findMainId(final String idPrefix, final List<OafEntity> list) {
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final List<String> valids = new ArrayList<>();
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for (final OafEntity e : list) {
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if (e.getId().startsWith(idPrefix)) {
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valids.add(e.getId());
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}
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}
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if (valids.isEmpty()) { return null; }
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valids.sort(String::compareTo);
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return valids.get(0);
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}
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private void emit(final Similarity simrel, final Context context) {
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try {
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valueOut.set(simrel.toJsonBytes());
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context.getCounter("organization", "relations (total)").increment(1);
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context.write(NullWritable.get(), valueOut);
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} catch (IOException | InterruptedException e) {
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throw new RuntimeException(e);
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}
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}
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private Similarity newSimilarity(final String openOrgsId, final OafEntity oafEntity) {
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final Similarity s = new Similarity();
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s.setOpenOrgID(openOrgsId);
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s.setOpenaireId(oafEntity.getId());
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s.setOpenaireOriginalId(oafEntity.getOriginalId(0));
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s.setName(oafEntity.getOrganization().getMetadata().getLegalname().getValue());
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s.setAcronym(oafEntity.getOrganization().getMetadata().getLegalshortname().getValue());
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s.setCountry(oafEntity.getOrganization().getMetadata().getCountry().getClassid());
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s.setUrl(oafEntity.getOrganization().getMetadata().getWebsiteurl().getValue());
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s.setCollectedFrom(oafEntity.getCollectedfrom(0).getValue());
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return s;
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}
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}
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