added filter

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

@@ -10,12 +10,12 @@ import java.util.function.Function;
 import java.util.stream.Collectors;
 import java.util.stream.Stream;
 
-import eu.dnetlib.dhp.schema.common.ModelSupport;
 import org.apache.commons.lang3.StringUtils;
 
 import com.google.common.collect.HashBiMap;
 import com.google.common.collect.Maps;
 
+import eu.dnetlib.dhp.schema.common.ModelSupport;
 import eu.dnetlib.dhp.schema.oaf.*;
 import eu.dnetlib.dhp.utils.DHPUtils;
 
@@ -66,20 +66,24 @@ public class IdentifierFactory implements Serializable {
 
 		StructuredProperty pid = null;
 		if (entity.getPid() != null) {
-			pid = entity.getPid()
+			pid = entity
+				.getPid()
 				.stream()
 				.filter(Objects::nonNull)
 				.filter(s -> s.getQualifier() != null && "doi".equalsIgnoreCase(s.getQualifier().getClassid()))
 				.filter(IdentifierFactory::pidFilter)
-			.findAny().orElse(null);
+				.findAny()
+				.orElse(null);
 		} else {
 			if (entity.getInstance() != null) {
-				pid = entity.getInstance()
+				pid = entity
+					.getInstance()
 					.stream()
 					.filter(i -> i.getPid() != null)
 					.flatMap(i -> i.getPid().stream())
 					.filter(IdentifierFactory::pidFilter)
-						.findAny().orElse(null);
+					.findAny()
+					.orElse(null);
 			}
 		}
 		if (pid != null)

dhp-workflows/dhp-doiboost/src/main/java/eu/dnetlib/doiboost/DoiBoostMappingUtil.scala

@@ -196,6 +196,8 @@ object DoiBoostMappingUtil {
     //Case empty publication
     if (publication == null)
       return false
+    if (publication.getId == null || publication.getId.isEmpty)
+      return false
 
     //Case publication with no title
     if (publication.getTitle == null || publication.getTitle.size == 0)