From 7dc3b8ec3ae3429c81e744f61f6b772666c7b6b3 Mon Sep 17 00:00:00 2001
From: Thomas Meyer <thomas@m3y3r.de>
Date: Sat, 3 Aug 2019 14:59:22 +0200
Subject: [PATCH] JpaSystemScopeRepository: Fix JPA expectations

---
 .../oauth2/repository/impl/JpaSystemScopeRepository.java     | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/openid-connect-server/src/main/java/org/mitre/oauth2/repository/impl/JpaSystemScopeRepository.java b/openid-connect-server/src/main/java/org/mitre/oauth2/repository/impl/JpaSystemScopeRepository.java
index f2d575b19..ad0d2da47 100644
--- a/openid-connect-server/src/main/java/org/mitre/oauth2/repository/impl/JpaSystemScopeRepository.java
+++ b/openid-connect-server/src/main/java/org/mitre/oauth2/repository/impl/JpaSystemScopeRepository.java
@@ -23,6 +23,7 @@ package org.mitre.oauth2.repository.impl;
 import static org.mitre.util.jpa.JpaUtil.getSingleResult;
 import static org.mitre.util.jpa.JpaUtil.saveOrUpdate;
 
+import java.util.Collections;
 import java.util.HashSet;
 import java.util.LinkedHashSet;
 import java.util.Set;
@@ -79,6 +80,10 @@ public class JpaSystemScopeRepository implements SystemScopeRepository {
 
 	@Override
 	public Set<SystemScope> getByValues(Set<String> values) {
+		if(values.isEmpty()) {
+			return Collections.emptySet();
+		}
+
 		TypedQuery<SystemScope> query = em.createNamedQuery(SystemScope.QUERY_BY_VALUES, SystemScope.class);
 		query.setParameter(SystemScope.PARAM_VALUE, values);
 		return new HashSet<>(query.getResultList());