[GitHub] [zeppelin] hsteinmueller commented on a change in pull request #3480: [ZEPPELIN-3644] SPARQL-Interpreter support via Apache Jena ARQ

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hsteinmueller commented on a change in pull request #3480: [ZEPPELIN-3644] SPARQL-Interpreter support via Apache Jena ARQ
URL: https://github.com/apache/zeppelin/pull/3480#discussion_r337435426
 
 

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 File path: sparql/src/main/java/org/apache/zeppelin/fuseki/SparqlInterpreter.java
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+/*
+ * 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.zeppelin.sparql;
+
+import org.apache.commons.lang3.StringUtils;
+
+import org.apache.http.HttpStatus;
+
+import org.apache.jena.query.Query;
+import org.apache.jena.query.QueryExecution;
+import org.apache.jena.query.QueryExecutionFactory;
+import org.apache.jena.query.QueryFactory;
+import org.apache.jena.query.QueryParseException;
+import org.apache.jena.query.ResultSet;
+import org.apache.jena.query.ResultSetFormatter;
+import org.apache.jena.shared.PrefixMapping;
+import org.apache.jena.sparql.engine.http.QueryExceptionHTTP;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.ByteArrayOutputStream;
+import java.util.Map;
+import java.util.Properties;
+
+import org.apache.zeppelin.interpreter.Interpreter;
+import org.apache.zeppelin.interpreter.InterpreterContext;
+import org.apache.zeppelin.interpreter.InterpreterResult;
+
+
+/**
+ * Interpreter for SPARQL-Query via Apache Jena ARQ.
+ */
+public class SparqlInterpreter extends Interpreter {
+  private static final Logger LOGGER = LoggerFactory.getLogger(SparqlInterpreter.class);
+
+  public static final String SPARQL_SERVICE_ENDPOINT = "sparql.endpoint";
+  public static final String SPARQL_REPLACE_URIS = "sparql.replaceURIs";
+  public static final String SPARQL_REMOVE_DATATYPES = "sparql.removeDatatypes";
+
+  public SparqlInterpreter(Properties properties) {
+    super(properties);
+  }
+
+  @Override
+  public void open() {
+    LOGGER.info("Properties: {}", getProperties());
+  }
+
+  @Override
+  public void close() {
+  }
+
+  @Override
+  public InterpreterResult interpret(String queryString, InterpreterContext context) {
+    final String serviceEndpoint = getProperty(SPARQL_SERVICE_ENDPOINT);
+    final String replaceURIs = getProperty(SPARQL_REPLACE_URIS);
+    final String removeDatatypes = getProperty(SPARQL_REMOVE_DATATYPES);
 
 Review comment:
   fixed

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