From 8e97598eb4b56cc1ca05260e59b81e6bfae4aff4 Mon Sep 17 00:00:00 2001
From: Claudio Atzori <claudio.atzori@isti.cnr.it>
Date: Mon, 13 Jul 2020 20:46:14 +0200
Subject: [PATCH] avoid to NPE in case of null instances

---
 .../CreateRelatedEntitiesJob_phase1.java        | 17 ++++++++++-------
 1 file changed, 10 insertions(+), 7 deletions(-)

diff --git a/dhp-workflows/dhp-graph-provision/src/main/java/eu/dnetlib/dhp/oa/provision/CreateRelatedEntitiesJob_phase1.java b/dhp-workflows/dhp-graph-provision/src/main/java/eu/dnetlib/dhp/oa/provision/CreateRelatedEntitiesJob_phase1.java
index 57dca7bb1..f3188007a 100644
--- a/dhp-workflows/dhp-graph-provision/src/main/java/eu/dnetlib/dhp/oa/provision/CreateRelatedEntitiesJob_phase1.java
+++ b/dhp-workflows/dhp-graph-provision/src/main/java/eu/dnetlib/dhp/oa/provision/CreateRelatedEntitiesJob_phase1.java
@@ -184,13 +184,16 @@ public class CreateRelatedEntitiesJob_phase1 {
 				re.setDateofacceptance(getValue(result.getDateofacceptance()));
 				re.setPublisher(getValue(result.getPublisher()));
 				re.setResulttype(result.getResulttype());
-				re
-					.setInstances(
-						result
-							.getInstance()
-							.stream()
-							.limit(ProvisionConstants.MAX_INSTANCES)
-							.collect(Collectors.toList()));
+				if (Objects.nonNull(result.getInstance())) {
+					re
+						.setInstances(
+							result
+								.getInstance()
+								.stream()
+								.filter(Objects::nonNull)
+								.limit(ProvisionConstants.MAX_INSTANCES)
+								.collect(Collectors.toList()));
+				}
 
 				// TODO still to be mapped
 				// re.setCodeRepositoryUrl(j.read("$.coderepositoryurl"));