dhp-common/src/main/java/eu/dnetlib/dhp/schema/oaf/utils/GraphCleaningFunctions.java

@@ -1,6 +1,8 @@
 
 package eu.dnetlib.dhp.schema.oaf.utils;
 
+import static eu.dnetlib.dhp.schema.oaf.utils.OafMapperUtils.getProvenance;
+
 import java.time.LocalDate;
 import java.time.ZoneId;
 import java.time.format.DateTimeFormatter;
@@ -16,7 +18,6 @@ import com.github.sisyphsu.dateparser.DateParserUtils;
 import com.google.common.collect.Lists;
 import com.google.common.collect.Sets;
 
-import eu.dnetlib.dhp.common.vocabulary.Vocabulary;
 import eu.dnetlib.dhp.common.vocabulary.VocabularyGroup;
 import eu.dnetlib.dhp.schema.common.ModelConstants;
 import eu.dnetlib.dhp.schema.common.ModelSupport;
@@ -191,8 +192,8 @@ public class GraphCleaningFunctions extends CleaningFunctions {
 						qualifier("und", "Undetermined", ModelConstants.DNET_LANGUAGES));
 			}
 			if (Objects.nonNull(r.getSubject())) {
-				r
+				List<Subject> subjects = Lists
-					.setSubject(
+					.newArrayList(
 						r
 							.getSubject()
 							.stream()
@@ -201,7 +202,18 @@ public class GraphCleaningFunctions extends CleaningFunctions {
 							.filter(sp -> Objects.nonNull(sp.getQualifier()))
 							.filter(sp -> StringUtils.isNotBlank(sp.getQualifier().getClassid()))
 							.map(GraphCleaningFunctions::cleanValue)
-							.collect(Collectors.toList()));
+							.collect(
+								Collectors
+									.toMap(
+										s -> Optional
+											.ofNullable(s.getQualifier())
+											.map(q -> q.getClassid() + s.getValue())
+											.orElse(s.getValue()),
+										Function.identity(),
+										(s1, s2) -> Collections
+											.min(Lists.newArrayList(s1, s1), new SubjectProvenanceComparator())))
+							.values());
+				r.setSubject(subjects);
 			}
 			if (Objects.nonNull(r.getTitle())) {
 				r
@@ -382,14 +394,7 @@ public class GraphCleaningFunctions extends CleaningFunctions {
 									.filter(p -> StringUtils.isNotBlank(p.getValue()))
 									.map(p -> {
 										// hack to distinguish orcid from orcid_pending
-										String pidProvenance = Optional
+										String pidProvenance = getProvenance(p.getDataInfo());
-											.ofNullable(p.getDataInfo())
-											.map(
-												d -> Optional
-													.ofNullable(d.getProvenanceaction())
-													.map(Qualifier::getClassid)
-													.orElse(""))
-											.orElse("");
 										if (p
 											.getQualifier()
 											.getClassid()

dhp-common/src/main/java/eu/dnetlib/dhp/schema/oaf/utils/OafMapperUtils.java

@@ -11,10 +11,10 @@ import java.util.function.Function;
 import java.util.function.Predicate;
 import java.util.stream.Collectors;
 
-import eu.dnetlib.dhp.schema.common.ModelConstants;
 import org.apache.commons.lang3.StringUtils;
 
 import eu.dnetlib.dhp.schema.common.AccessRightComparator;
+import eu.dnetlib.dhp.schema.common.ModelConstants;
 import eu.dnetlib.dhp.schema.common.ModelSupport;
 import eu.dnetlib.dhp.schema.oaf.*;
 
@@ -503,4 +503,15 @@ public class OafMapperUtils {
 		rel.setProperties(properties);
 		return rel;
 	}
+
+	public static String getProvenance(DataInfo dataInfo) {
+		return Optional
+			.ofNullable(dataInfo)
+			.map(
+				d -> Optional
+					.ofNullable(d.getProvenanceaction())
+					.map(Qualifier::getClassid)
+					.orElse(""))
+			.orElse("");
+	}
 }

dhp-common/src/main/java/eu/dnetlib/dhp/schema/oaf/utils/SubjectProvenanceComparator.java

@@ -0,0 +1,46 @@
+
+package eu.dnetlib.dhp.schema.oaf.utils;
+
+import static eu.dnetlib.dhp.schema.oaf.utils.OafMapperUtils.getProvenance;
+import static org.apache.commons.lang3.StringUtils.isBlank;
+
+import java.util.Comparator;
+
+import eu.dnetlib.dhp.schema.oaf.Subject;
+
+public class SubjectProvenanceComparator implements Comparator<Subject> {
+
+	@Override
+	public int compare(Subject left, Subject right) {
+
+		String lProv = getProvenance(left.getDataInfo());
+		String rProv = getProvenance(right.getDataInfo());
+
+		if (isBlank(lProv) && isBlank(rProv))
+			return 0;
+		if (isBlank(lProv))
+			return 1;
+		if (isBlank(rProv))
+			return -1;
+		if (lProv.equals(rProv))
+			return 0;
+		if (lProv.toLowerCase().contains("crosswalk"))
+			return -1;
+		if (rProv.toLowerCase().contains("crosswalk"))
+			return 1;
+		if (lProv.toLowerCase().contains("user"))
+			return -1;
+		if (rProv.toLowerCase().contains("user"))
+			return 1;
+		if (lProv.toLowerCase().contains("propagation"))
+			return -1;
+		if (rProv.toLowerCase().contains("propagation"))
+			return 1;
+		if (lProv.toLowerCase().contains("iis"))
+			return -1;
+		if (rProv.toLowerCase().contains("iis"))
+			return 1;
+
+		return 0;
+	}
+}

dhp-workflows/dhp-graph-mapper/src/test/java/eu/dnetlib/dhp/oa/graph/clean/GraphCleaningFunctionsTest.java

@@ -260,14 +260,16 @@ public class GraphCleaningFunctionsTest {
 			.collect(Collectors.toList());
 
 		assertNotNull(fos_subjects);
-		assertEquals(3, fos_subjects.size());
+		assertEquals(2, fos_subjects.size());
 
 		assertTrue(
 			fos_subjects
 				.stream()
 				.anyMatch(
 					s -> "0101 mathematics".equals(s.getValue()) &
-						ModelConstants.DNET_SUBJECT_FOS_CLASSID.equals(s.getQualifier().getClassid())));
+						ModelConstants.DNET_SUBJECT_FOS_CLASSID.equals(s.getQualifier().getClassid()) &
+						"sysimport:crosswalk:datasetarchive".equals(s.getDataInfo().getProvenanceaction().getClassid())
+				));
 
 		assertTrue(
 			fos_subjects

dhp-workflows/dhp-graph-mapper/src/test/resources/eu/dnetlib/dhp/oa/graph/clean/result.json

@@ -794,6 +794,28 @@
       },
       "value": "0101 mathematics"
     },
+    {
+      "dataInfo": {
+        "deletedbyinference": false,
+        "inferenceprovenance": "",
+        "inferred": false,
+        "invisible": false,
+        "provenanceaction": {
+          "classid": "subject:fos",
+          "classname": "subject:fos",
+          "schemeid": "dnet:provenanceActions",
+          "schemename": "dnet:provenanceActions"
+        },
+        "trust": "0.9"
+      },
+      "qualifier": {
+        "classid": "keyword",
+        "classname": "keyword",
+        "schemeid": "dnet:subject_classification_typologies",
+        "schemename": "dnet:subject_classification_typologies"
+      },
+      "value": "0101 mathematics"
+    },
     {
       "dataInfo": {
         "deletedbyinference": false,