[BETA wf only] datasources involved in the merge operation doesn't obey to the infra precedence policy, but relies on a custom behaviour that, given two datasources from beta and prod returns the one from prod with the highest compatibility among the two

dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/merge/DatasourceCompatibilityComparator.java

@@ -0,0 +1,97 @@
+
+package eu.dnetlib.dhp.oa.graph.merge;
+
+import java.util.Comparator;
+
+import eu.dnetlib.dhp.schema.oaf.Qualifier;
+
+public class DatasourceCompatibilityComparator implements Comparator<Qualifier> {
+	@Override
+	public int compare(Qualifier left, Qualifier right) {
+
+		String lClass = left.getClassid();
+		String rClass = right.getClassid();
+
+		if (lClass.equals(rClass))
+			return 0;
+
+		if (lClass.equals("openaire-cris_1.1"))
+			return -1;
+		if (rClass.equals("openaire-cris_1.1"))
+			return 1;
+
+		if (lClass.equals("openaire4.0"))
+			return -1;
+		if (rClass.equals("openaire4.0"))
+			return 1;
+
+		if (lClass.equals("driver-openaire2.0"))
+			return -1;
+		if (rClass.equals("driver-openaire2.0"))
+			return 1;
+
+		if (lClass.equals("driver"))
+			return -1;
+		if (rClass.equals("driver"))
+			return 1;
+
+		if (lClass.equals("openaire2.0"))
+			return -1;
+		if (rClass.equals("openaire2.0"))
+			return 1;
+
+		if (lClass.equals("openaire3.0"))
+			return -1;
+		if (rClass.equals("openaire3.0"))
+			return 1;
+
+		if (lClass.equals("openaire2.0_data"))
+			return -1;
+		if (rClass.equals("openaire2.0_data"))
+			return 1;
+
+		if (lClass.equals("native"))
+			return -1;
+		if (rClass.equals("native"))
+			return 1;
+
+		if (lClass.equals("hostedBy"))
+			return -1;
+		if (rClass.equals("hostedBy"))
+			return 1;
+
+		if (lClass.equals("notCompatible"))
+			return -1;
+		if (rClass.equals("notCompatible"))
+			return 1;
+
+		if (lClass.equals("UNKNOWN"))
+			return -1;
+		if (rClass.equals("UNKNOWN"))
+			return 1;
+
+		// Else (but unlikely), lexicographical ordering will do.
+		return lClass.compareTo(rClass);
+	}
+
+	/*
+	 * CASE WHEN (array_agg(DISTINCT COALESCE (a.compatibility_override, a.compatibility):: TEXT) @> ARRAY
+	 * ['openaire-cris_1.1']) THEN 'openaire-cris_1.1@@@dnet:datasourceCompatibilityLevel' WHEN (array_agg(DISTINCT
+	 * COALESCE (a.compatibility_override, a.compatibility):: TEXT) @> ARRAY ['openaire4.0']) THEN
+	 * 'openaire4.0@@@dnet:datasourceCompatibilityLevel' WHEN (array_agg(DISTINCT COALESCE (a.compatibility_override,
+	 * a.compatibility):: TEXT) @> ARRAY ['driver', 'openaire2.0']) THEN
+	 * 'driver-openaire2.0@@@dnet:datasourceCompatibilityLevel' WHEN (array_agg(DISTINCT COALESCE
+	 * (a.compatibility_override, a.compatibility) :: TEXT) @> ARRAY ['driver']) THEN
+	 * 'driver@@@dnet:datasourceCompatibilityLevel' WHEN (array_agg(DISTINCT COALESCE (a.compatibility_override,
+	 * a.compatibility) :: TEXT) @> ARRAY ['openaire2.0']) THEN 'openaire2.0@@@dnet:datasourceCompatibilityLevel' WHEN
+	 * (array_agg(DISTINCT COALESCE (a.compatibility_override, a.compatibility) :: TEXT) @> ARRAY ['openaire3.0']) THEN
+	 * 'openaire3.0@@@dnet:datasourceCompatibilityLevel' WHEN (array_agg(DISTINCT COALESCE (a.compatibility_override,
+	 * a.compatibility) :: TEXT) @> ARRAY ['openaire2.0_data']) THEN
+	 * 'openaire2.0_data@@@dnet:datasourceCompatibilityLevel' WHEN (array_agg(DISTINCT COALESCE
+	 * (a.compatibility_override, a.compatibility) :: TEXT) @> ARRAY ['native']) THEN
+	 * 'native@@@dnet:datasourceCompatibilityLevel' WHEN (array_agg(DISTINCT COALESCE (a.compatibility_override,
+	 * a.compatibility) :: TEXT) @> ARRAY ['hostedBy']) THEN 'hostedBy@@@dnet:datasourceCompatibilityLevel' WHEN
+	 * (array_agg(DISTINCT COALESCE (a.compatibility_override, a.compatibility) :: TEXT) @> ARRAY ['notCompatible'])
+	 * THEN 'notCompatible@@@dnet:datasourceCompatibilityLevel' ELSE 'UNKNOWN@@@dnet:datasourceCompatibilityLevel' END
+	 */
+}

dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/merge/MergeGraphSparkJob.java

@@ -3,8 +3,9 @@ package eu.dnetlib.dhp.oa.graph.merge;
 
 import static eu.dnetlib.dhp.common.SparkSessionSupport.runWithSparkSession;
 
-import java.util.Objects;
+import java.util.*;
-import java.util.Optional;
+
+import javax.xml.crypto.Data;
 
 import org.apache.commons.io.IOUtils;
 import org.apache.spark.SparkConf;
@@ -14,6 +15,7 @@ import org.apache.spark.sql.Dataset;
 import org.apache.spark.sql.Encoders;
 import org.apache.spark.sql.SaveMode;
 import org.apache.spark.sql.SparkSession;
+import org.jetbrains.annotations.NotNull;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -39,6 +41,14 @@ public class MergeGraphSparkJob {
 
 	private static final String PRIORITY_DEFAULT = "BETA"; // BETA | PROD
 
+	private static final Datasource DATASOURCE = new Datasource();
+
+	static {
+		Qualifier compatibility = new Qualifier();
+		compatibility.setClassid("UNKNOWN");
+		DATASOURCE.setOpenairecompatibility(compatibility);
+	}
+
 	public static void main(String[] args) throws Exception {
 
 		String jsonConfiguration = IOUtils
@@ -104,6 +114,10 @@ public class MergeGraphSparkJob {
 			.map((MapFunction<Tuple2<Tuple2<String, P>, Tuple2<String, B>>, P>) value -> {
 				Optional<P> p = Optional.ofNullable(value._1()).map(Tuple2::_2);
 				Optional<B> b = Optional.ofNullable(value._2()).map(Tuple2::_2);
+
+				if (p.orElse((P) b.orElse((B) DATASOURCE)) instanceof Datasource) {
+					return mergeDatasource(p, b);
+				}
 				switch (priority) {
 					default:
 					case "BETA":
@@ -119,6 +133,25 @@ public class MergeGraphSparkJob {
 			.json(outputPath);
 	}
 
+	protected static <P extends Oaf, B extends Oaf> P mergeDatasource(Optional<P> p, Optional<B> b) {
+		if (p.isPresent() & !b.isPresent()) {
+			return p.get();
+		}
+		if (b.isPresent() & !p.isPresent()) {
+			return (P) b.get();
+		}
+		if (!b.isPresent() & !p.isPresent()) {
+			return null; // unlikely, at least one should be produced by the join operation
+		}
+
+		Datasource dp = (Datasource) p.get();
+		Datasource db = (Datasource) b.get();
+
+		List<Qualifier> list = Arrays.asList(dp.getOpenairecompatibility(), db.getOpenairecompatibility());
+		dp.setOpenairecompatibility(Collections.min(list, new DatasourceCompatibilityComparator()));
+		return (P) dp;
+	}
+
 	private static <P extends Oaf, B extends Oaf> P mergeWithPriorityToPROD(Optional<P> p, Optional<B> b) {
 		if (b.isPresent() & !p.isPresent()) {
 			return (P) b.get();

dhp-workflows/dhp-graph-mapper/src/test/java/eu/dnetlib/dhp/oa/graph/merge/MergeGraphSparkJobTest.java

@@ -0,0 +1,84 @@
+
+package eu.dnetlib.dhp.oa.graph.merge;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import java.io.IOException;
+import java.util.Optional;
+
+import org.apache.commons.io.IOUtils;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import com.fasterxml.jackson.databind.DeserializationFeature;
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+import eu.dnetlib.dhp.schema.oaf.Datasource;
+
+public class MergeGraphSparkJobTest {
+
+	private ObjectMapper mapper;
+
+	@BeforeEach
+	public void setUp() {
+		mapper = new ObjectMapper().configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
+	}
+
+	@Test
+	public void testMergeDatasources() throws IOException {
+		assertEquals(
+			"openaire-cris_1.1",
+			MergeGraphSparkJob
+				.mergeDatasource(
+					d("datasource_cris.json"),
+					d("datasource_UNKNOWN.json"))
+				.getOpenairecompatibility()
+				.getClassid());
+		assertEquals(
+			"openaire-cris_1.1",
+			MergeGraphSparkJob
+				.mergeDatasource(
+					d("datasource_UNKNOWN.json"),
+					d("datasource_cris.json"))
+				.getOpenairecompatibility()
+				.getClassid());
+		assertEquals(
+			"driver-openaire2.0",
+			MergeGraphSparkJob
+				.mergeDatasource(
+					d("datasource_native.json"),
+					d("datasource_driver-openaire2.0.json"))
+				.getOpenairecompatibility()
+				.getClassid());
+		assertEquals(
+			"driver-openaire2.0",
+			MergeGraphSparkJob
+				.mergeDatasource(
+					d("datasource_driver-openaire2.0.json"),
+					d("datasource_native.json"))
+				.getOpenairecompatibility()
+				.getClassid());
+		assertEquals(
+			"openaire4.0",
+			MergeGraphSparkJob
+				.mergeDatasource(
+					d("datasource_notCompatible.json"),
+					d("datasource_openaire4.0.json"))
+				.getOpenairecompatibility()
+				.getClassid());
+		assertEquals(
+			"notCompatible",
+			MergeGraphSparkJob
+				.mergeDatasource(
+					d("datasource_notCompatible.json"),
+					d("datasource_UNKNOWN.json"))
+				.getOpenairecompatibility()
+				.getClassid());
+	}
+
+	private Optional<Datasource> d(String file) throws IOException {
+		String json = IOUtils.toString(getClass().getResourceAsStream(file));
+		return Optional.of(mapper.readValue(json, Datasource.class));
+	}
+
+}

dhp-workflows/dhp-graph-mapper/src/test/resources/eu/dnetlib/dhp/oa/graph/merge/datasource_UNKNOWN.json

@@ -0,0 +1 @@
+{ "id": "10|274269ac6f3b::2a2e2793b500f3f7b47ef24b1a9277b7", "openairecompatibility": { "classid": "UNKNOWN" }}

dhp-workflows/dhp-graph-mapper/src/test/resources/eu/dnetlib/dhp/oa/graph/merge/datasource_cris.json

@@ -0,0 +1 @@
+{ "id": "10|274269ac6f3b::2a2e2793b500f3f7b47ef24b1a9277b7", "openairecompatibility": { "classid": "openaire-cris_1.1" }}

dhp-workflows/dhp-graph-mapper/src/test/resources/eu/dnetlib/dhp/oa/graph/merge/datasource_driver-openaire2.0.json

@@ -0,0 +1 @@
+{ "id": "10|274269ac6f3b::2a2e2793b500f3f7b47ef24b1a9277b7", "openairecompatibility": { "classid": "driver-openaire2.0" }}

dhp-workflows/dhp-graph-mapper/src/test/resources/eu/dnetlib/dhp/oa/graph/merge/datasource_hostedby.json

@@ -0,0 +1 @@
+{ "id": "10|274269ac6f3b::2a2e2793b500f3f7b47ef24b1a9277b7", "openairecompatibility": { "classid": "hostedBy" }}

dhp-workflows/dhp-graph-mapper/src/test/resources/eu/dnetlib/dhp/oa/graph/merge/datasource_native.json

@@ -0,0 +1 @@
+{ "id": "10|274269ac6f3b::2a2e2793b500f3f7b47ef24b1a9277b7", "openairecompatibility": { "classid": "native" }}

dhp-workflows/dhp-graph-mapper/src/test/resources/eu/dnetlib/dhp/oa/graph/merge/datasource_notCompatible.json

@@ -0,0 +1 @@
+{ "id": "10|274269ac6f3b::2a2e2793b500f3f7b47ef24b1a9277b7", "openairecompatibility": { "classid": "notCompatible" }}

dhp-workflows/dhp-graph-mapper/src/test/resources/eu/dnetlib/dhp/oa/graph/merge/datasource_openaire2.0.json

@@ -0,0 +1 @@
+{ "id": "10|274269ac6f3b::2a2e2793b500f3f7b47ef24b1a9277b7", "openairecompatibility": { "classid": "openaire2.0" }}

dhp-workflows/dhp-graph-mapper/src/test/resources/eu/dnetlib/dhp/oa/graph/merge/datasource_openaire2.0_data.json

@@ -0,0 +1 @@
+{ "id": "10|274269ac6f3b::2a2e2793b500f3f7b47ef24b1a9277b7", "openairecompatibility": { "classid": "openaire2.0_data" }}

dhp-workflows/dhp-graph-mapper/src/test/resources/eu/dnetlib/dhp/oa/graph/merge/datasource_openaire3.0.json

@@ -0,0 +1 @@
+{ "id": "10|274269ac6f3b::2a2e2793b500f3f7b47ef24b1a9277b7", "openairecompatibility": { "classid": "openaire3.0" }}

dhp-workflows/dhp-graph-mapper/src/test/resources/eu/dnetlib/dhp/oa/graph/merge/datasource_openaire4.0.json

@@ -0,0 +1 @@
+{ "id": "10|274269ac6f3b::2a2e2793b500f3f7b47ef24b1a9277b7", "openairecompatibility": { "classid": "openaire4.0" }}