issue #745 : Fix another instance in RDFJSONParser

Signed-off-by: Peter Ansell <p_ansell@yahoo.com>

Author: ansell

core/rio/rdfjson/src/main/java/org/eclipse/rdf4j/rio/rdfjson/RDFJSONParser.java

@@ -72,7 +72,7 @@ public void parse(final InputStream inputStream, final String baseUri)
 		JsonParser jp = null;
 
 		clear();
-		
+
 		try {
 			if (this.rdfHandler != null) {
 				this.rdfHandler.startRDF();
@@ -156,12 +156,15 @@ protected void reportFatalError(String msg, JsonLocation location)
 	public void parse(final Reader reader, final String baseUri)
 		throws IOException, RDFParseException, RDFHandlerException
 	{
-		if (rdfHandler != null) {
-			rdfHandler.startRDF();
-		}
 		JsonParser jp = null;
 
+		clear();
+
 		try {
+			if (this.rdfHandler != null) {
+				this.rdfHandler.startRDF();
+			}
+
 			jp = RDFJSONUtility.JSON_FACTORY.createParser(reader);
 			rdfJsonToHandlerInternal(rdfHandler, valueFactory, jp);
 		}
@@ -174,6 +177,7 @@ public void parse(final Reader reader, final String baseUri)
 			}
 		}
 		finally {
+			clear();
 			if (jp != null) {
 				try {
 					jp.close();
@@ -356,11 +360,11 @@ else if (RDFJSONUtility.URI.equals(nextType)) {
 					if (!nextContexts.isEmpty()) {
 						for (final String nextContext : nextContexts) {
 							final Resource context;
-							
-							if(nextContext.equals(RDFJSONUtility.NULL)) {
+
+							if (nextContext.equals(RDFJSONUtility.NULL)) {
 								context = null;
 							}
-							else if(nextContext.startsWith("_:")) {
+							else if (nextContext.startsWith("_:")) {
 								context = createBNode(nextContext.substring(2));
 							}
 							else {