fix (core): Fix subtle bug in WritableResourceRDFHandler which appear…

…ed during RDF4j 5.0.1 to 5.0.2 upgrade

Related to eclipse-rdf4j/rdf4j#5096.

java/dev/enola/core/rosetta/RosettaTest.java

@@ -33,6 +33,7 @@
 import dev.enola.common.io.resource.MemoryResource;
 import dev.enola.common.io.resource.ResourceProvider;
 import dev.enola.common.io.resource.StringResource;
+import dev.enola.common.yamljson.JSON;
 import dev.enola.rdf.io.RdfLoader;
 import dev.enola.rdf.io.RdfMediaTypes;
 import dev.enola.thing.Thing;
@@ -134,6 +135,16 @@ public void testJsonToTurtle() throws Exception {
         assertThat(out.charSource().read()).contains("firstName> \"Salvador\"");
     }
 
+    @Test
+    public void testJsonToJsonld() throws Exception {
+        var in = rp.get("classpath:/picasso.json?context=classpath:/picasso-context.jsonld");
+        var out = new MemoryResource(RdfMediaTypes.JSON_LD);
+        rosetta.convertInto(in, out);
+        // This is to detect invalid JSON, which happened during the RDF4j 5.0.1 to 5.0.2 upgrade
+        JSON.readObject(out.charSource().read());
+        assertThat(out.charSource().read()).contains("firstName");
+    }
+
     @Test
     public void testYamlToTurtle() throws Exception {
         var in = rp.get("classpath:/picasso.yaml?context=classpath:/picasso-context.jsonld");

java/dev/enola/rdf/io/WritableResourceRDFHandler.java

@@ -67,7 +67,7 @@ private WritableResourceRDFHandler(RDFWriter rdfWriter, Writer ioWriter)
 
     @Override
     public void close() throws IOException {
-        endRDF();
+        rdfWriter.endRDF();
         ioWriter.close();
     }
 
@@ -78,7 +78,7 @@ public void startRDF() throws RDFHandlerException {
 
     @Override
     public void endRDF() throws RDFHandlerException {
-        rdfWriter.endRDF();
+        // SUPPRESS rdfWriter.endRDF();
     }
 
     @Override