Github user joshelser commented on a diff in the pull request:
https://github.com/apache/nifi/pull/420#discussion_r62859193
--- Diff:
nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/calcite/adapter/csv/CsvEnumerator2.java
---
@@ -0,0 +1,303 @@
+/*
+ * 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.calcite.adapter.csv;
+
+import java.io.IOException;
+import java.text.ParseException;
+import java.util.ArrayList;
+import java.util.Date;
+import java.util.List;
+import java.util.TimeZone;
+
+import org.apache.calcite.adapter.java.JavaTypeFactory;
+import org.apache.calcite.linq4j.Enumerator;
+import org.apache.calcite.rel.type.RelDataType;
+import org.apache.calcite.util.Pair;
+import org.apache.commons.lang3.time.FastDateFormat;
+
+import au.com.bytecode.opencsv.CSVReader;
+
+
+/** Enumerator that reads from a CSV stream.
+ *
+ * @param <E> Row type
+ */
+class CsvEnumerator2<E> implements Enumerator<E> {
--- End diff --
> Yes, Itâs modified Calcite CSV adapter. Current Calcite adapter
supports only reading from java.io.File So CSV adapter is modified to support
reading from java.io.InputStream
A name that represents what this does and a class-level javadoc is always
great to capture this information :).
I reread Julian's comments, trying to reconcile what he suggested with what
you have here. I think the context in which you're using calcite is probably
safe (the processor driving things). Neat approach.
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