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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 com.googlecode.protobuf.format.JsonFormat;
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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 GenerateOrganizationsReducer 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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final OafEntity e1 = findOrgToEmit(OpenOrgsCommon.OPENORGS_MAIN_PREFIX, list);
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if (e1 != null) {
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context.getCounter("organization", "already present in openOrgs").increment(1);;
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return;
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}
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final OafEntity e2 = findOrgToEmit(OpenOrgsCommon.OPENORGS_CORDA_FP7_PREFIX, list);
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if (e2 != null) {
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context.getCounter("organization", "new (from corda FP7)").increment(1);
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emit(e2, context);
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return;
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}
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final OafEntity e3 = findOrgToEmit(OpenOrgsCommon.OPENORGS_CORDA_H2020_PREFIX, list);
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if (e3 != null) {
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context.getCounter("organization", "new (from corda H2020)").increment(1);
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emit(e3, context);
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return;
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}
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final OafEntity e4 = findOrgToEmit("20|", list);
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if (e4 != null) {
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context.getCounter("organization", "new (from other sources)").increment(1);
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emit(e4, context);
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return;
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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 OafEntity findOrgToEmit(final String idPrefix, final List<OafEntity> list) {
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final List<OafEntity> 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);
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}
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}
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if (valids.isEmpty()) { return null; }
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valids.sort((o1, o2) -> StringUtils.compare(o1.getId(), o2.getId()));
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return valids.get(0);
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}
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private void emit(final OafEntity entity, final Context context) {
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try {
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context.getCounter("organization", "new (total)").increment(1);
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valueOut.set(JsonFormat.printToString(entity));
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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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}
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