Parse NeTEx Resource frame without organisation

src/main/java/org/opentripplanner/netex/loader/parser/ResourceFrameParser.java

@@ -57,8 +57,10 @@ void setResultOnIndex(NetexEntityIndex netexIndex) {
   /* private methods */
 
   private void parseOrganization(OrganisationsInFrame_RelStructure elements) {
-    for (JAXBElement<?> e : elements.getOrganisation_()) {
-      parseOrganization((Organisation_VersionStructure) e.getValue());
+    if (elements != null) {
+      for (JAXBElement<?> e : elements.getOrganisation_()) {
+        parseOrganization((Organisation_VersionStructure) e.getValue());
+      }
     }
   }
 

src/test/java/org/opentripplanner/netex/loader/parser/ResourceFrameParserTest.java

@@ -0,0 +1,47 @@
+package org.opentripplanner.netex.loader.parser;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+import jakarta.xml.bind.JAXBElement;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.opentripplanner.netex.index.NetexEntityIndex;
+import org.rutebanken.netex.model.Authority;
+import org.rutebanken.netex.model.DataManagedObjectStructure;
+import org.rutebanken.netex.model.ObjectFactory;
+import org.rutebanken.netex.model.ResourceFrame;
+
+class ResourceFrameParserTest {
+
+  private ResourceFrameParser resourceFrameParser;
+  private ResourceFrame resourceFrame;
+  private ObjectFactory objectFactory;
+  private NetexEntityIndex netexEntityIndex;
+
+  @BeforeEach
+  void setUp() {
+    resourceFrameParser = new ResourceFrameParser();
+    resourceFrame = new ResourceFrame();
+    objectFactory = new ObjectFactory();
+    netexEntityIndex = new NetexEntityIndex();
+  }
+
+  @Test
+  void testResourceFrameWithOrganization() {
+    JAXBElement<? extends DataManagedObjectStructure> organisation = objectFactory.createAuthority(
+      new Authority()
+    );
+    resourceFrame.setOrganisations(objectFactory.createOrganisationsInFrame_RelStructure());
+    resourceFrame.getOrganisations().getOrganisation_().add(organisation);
+    resourceFrameParser.parse(resourceFrame);
+    resourceFrameParser.setResultOnIndex(netexEntityIndex);
+    assertEquals(1, netexEntityIndex.authoritiesById.size());
+  }
+
+  @Test
+  void testResourceFrameWithoutOrganization() {
+    resourceFrameParser.parse(resourceFrame);
+    resourceFrameParser.setResultOnIndex(netexEntityIndex);
+    assertEquals(0, netexEntityIndex.authoritiesById.size());
+  }
+}