D-Net

			context.getCounter("In mapper", "not null body ").increment(1);

			if (oaf == null) {

				context.getCounter("In mapper", " null oaf ").increment(1);

			}

			context.getCounter("In mapper", " write op ").increment(1);

        if(oaf.getDataInfo().getDeletedbyinference())

            return null;

        final List<ResultProtos.Result.Context> contextList = oaf.getEntity().getResult().getMetadata().getContextList();

        //communities contains all the communities to be added as context for the result

        final Set<String> communities = new HashSet<>();

        List<FieldTypeProtos.StructuredProperty> subjectSet = oaf.getEntity().getResult().getMetadata().getSubjectList();

        communities.addAll(analiseSubjects(subjectSet, conf));

        List<Pair<String, String>> datasourceSet = oaf.getEntity().getResult().getInstanceList()

                .stream()

                .map(i -> new Pair<>(i.getCollectedfrom().getKey(), i.getHostedby().getKey()))

                .collect(Collectors.toList());

        communities.addAll(analiseDatasource(datasourceSet, conf));

        //TODO: add code for Zenodo Communities

        final Map<String,Pair<Integer,ResultProtos.Result.Context>> contexts = new HashMap<>();

        for(int i = 0; i<contextList.size(); i++){

            contexts.put(contextList.get(i).getId(),new Pair<>(i,contextList.get(i)));

        }

        for(String contextId:communities){

            final Pair<Integer,ResultProtos.Result.Context> pair = contexts.get(contextId);

            ResultProtos.Result.Context c;

            if(pair == null)

                c = null;

             else

                 c = pair.getSnd();

            if (c != null) {

                // add new dataInfo if needed

                    Set<String> set = new HashSet<>();

                    set.addAll(c.getDataInfoList().stream().map(datainfo->datainfo.getInferenceprovenance()).collect(Collectors.toList()));

                    if (!set.contains(DATA_INFO_TYPE)) {

                        builder.getEntityBuilder().getResultBuilder().getMetadataBuilder().getContextBuilder(pair.getFst()).addDataInfo(buildDataInfo());

                       context.getCounter(COUNTER_GROUP, "add provenance").increment(1);

                    }

            } else {

                builder.getEntityBuilder().getResultBuilder().getMetadataBuilder().addContext(buildContext(contextId));

                context.getCounter(COUNTER_GROUP, "add context").increment(1);

            }

        }

        return builder.build();