Set default value if not defined (metafacture-core#415)

Author: dr0i

metafix/src/main/java/org/metafacture/metafix/FixMethod.java

@@ -535,7 +535,7 @@ public void apply(final Metafix metafix, final Record record, final List<String>
         public void apply(final Metafix metafix, final Record record, final List<String> params, final Map<String, String> options) {
             final Map<String, String> map = getMap(metafix, record, params, options, KIND_OF_RDFMAP);
             record.transform(params.get(0), oldValue -> {
-                final String newValue = map.get(oldValue);
+                final String newValue = map.getOrDefault(oldValue, defaultValue);
                 return newValue != null ? newValue : getBoolean(options, "delete") ? null : oldValue;
             });
         }

metafix/src/test/java/org/metafacture/metafix/MetafixLookupTest.java

@@ -959,7 +959,7 @@ public void shouldPrintUnknownToFileWithoutAppend() throws IOException {
     }
 
     @Test
-    public void shouldLookupInExternalRdfUseDefaultValueIfNotFound() {
+    public void shouldLookupInExternalRdfUseDefinedDefaultValueIfNotFound() {
         MetafixTestHelpers.assertFix(streamReceiver, Arrays.asList(
                 "lookup_rdf('created', '" + RDF_MAP + "', target: 'created', __default: '0000-01-01')"
             ),
@@ -976,6 +976,24 @@ public void shouldLookupInExternalRdfUseDefaultValueIfNotFound() {
         );
     }
 
+    @Test
+    public void shouldLookupInExternalRdfUseDefaultValueIfNotFound() {
+        MetafixTestHelpers.assertFix(streamReceiver, Arrays.asList(
+                "lookup_rdf('created', '" + RDF_MAP + "', target: 'created')"
+            ),
+            i -> {
+                i.startRecord("1");
+                i.literal("created", "https://w3id.org/kim/hochschulfaechersystematik/n4");
+                i.endRecord();
+            },
+            o -> {
+                o.get().startRecord("1");
+                o.get().literal("created", "__default");
+                o.get().endRecord();
+            }
+        );
+    }
+
     @Test
     public void shouldLookupInExternalRdfMapGetObjectOfSubjectWithTargetedPredicate() {
         MetafixTestHelpers.assertFix(streamReceiver, Arrays.asList(