serialize instance.license in the XML record

dhp-workflows/dhp-graph-provision/src/main/java/eu/dnetlib/dhp/oa/provision/utils/XmlRecordFactory.java

@@ -1134,6 +1134,14 @@ public class XmlRecordFactory implements Serializable {
 							.add(
 								XmlSerializationUtils.mapQualifier("accessright", instance.getAccessright()));
 					}
+					if (instance.getLicense() != null
+						&& isNotBlank(instance.getLicense().getValue())) {
+						fields
+							.add(
+								XmlSerializationUtils
+									.asXmlElement(
+										"license", instance.getLicense().getValue()));
+					}
 					if (instance.getCollectedfrom() != null && kvNotBlank(instance.getCollectedfrom())) {
 						fields
 							.add(

dhp-workflows/dhp-graph-provision/src/test/java/eu/dnetlib/dhp/oa/provision/XmlRecordFactoryTest.java

@@ -7,6 +7,8 @@ import java.io.IOException;
 import java.io.StringReader;
 import java.util.List;
 
+import javax.validation.constraints.AssertTrue;
+
 import org.apache.commons.io.IOUtils;
 import org.dom4j.Document;
 import org.dom4j.DocumentException;
@@ -150,6 +152,8 @@ public class XmlRecordFactoryTest {
 		Dataset d = OBJECT_MAPPER
 			.readValue(IOUtils.toString(getClass().getResourceAsStream("enermaps.json")), Dataset.class);
 
+		assertNotNull(d.getInstance().get(0).getLicense().getValue());
+
 		JoinedEntity je = new JoinedEntity<>(d);
 
 		String xml = xmlRecordFactory.build(je);