Github user ejwhite922 commented on a diff in the pull request:
https://github.com/apache/incubator-rya/pull/296#discussion_r187633086
--- Diff:
extras/kafka.connect/api/src/main/java/org/apache/rya/kafka/connect/api/StatementsSerializer.java
---
@@ -0,0 +1,77 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.rya.kafka.connect.api;
+
+import java.io.ByteArrayOutputStream;
+import java.util.Map;
+import java.util.Set;
+
+import org.apache.kafka.common.serialization.Serializer;
+import org.eclipse.rdf4j.model.Statement;
+import org.eclipse.rdf4j.rio.RDFWriter;
+import org.eclipse.rdf4j.rio.binary.BinaryRDFWriterFactory;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import edu.umd.cs.findbugs.annotations.DefaultAnnotation;
+import edu.umd.cs.findbugs.annotations.NonNull;
+
+/**
+ * A Kafka {@link Serializer} that is able to serialize a set of {@link
Statement}s
+ * using the RDF4J Rio Binary format.
+ */
+@DefaultAnnotation(NonNull.class)
+public class StatementsSerializer implements Serializer<Set<Statement>> {
+ private static final Logger log =
LoggerFactory.getLogger(StatementsSerializer.class);
+
+ private static final BinaryRDFWriterFactory WRITER_FACTORY = new
BinaryRDFWriterFactory();
+
+ @Override
+ public void configure(final Map<String, ?> configs, final boolean
isKey) {
+ // Nothing to do.
+ }
+
+ @Override
+ public byte[] serialize(final String topic, final Set<Statement> data)
{
+ if(data == null) {
+ // Returning null because that is the contract of this method.
+ return null;
+ }
+
+ // Write the statements using a Binary RDF Writer.
+ final ByteArrayOutputStream boas = new ByteArrayOutputStream();
--- End diff --
change variable name to baos
---
