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https://issues.apache.org/jira/browse/PARQUET-2347?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17781611#comment-17781611
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ASF GitHub Bot commented on PARQUET-2347:
-----------------------------------------
ConeyLiu commented on code in PR #1141:
URL: https://github.com/apache/parquet-mr/pull/1141#discussion_r1378437314
##########
parquet-common/src/main/java/org/apache/parquet/util/Reflection.java:
##########
@@ -0,0 +1,50 @@
+/*
+ * 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.parquet.util;
+
+import java.lang.reflect.Constructor;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+
+/**
+ * Lifted from Hadoop's org.apache.hadoop.util.ReflectionUtils.
+ */
+public class Reflection {
+
+ private static final Class<?>[] EMPTY_ARRAY = new Class[]{};
+ private static final Map<Class<?>, Constructor<?>> CONSTRUCTOR_CACHE = new
ConcurrentHashMap<Class<?>, Constructor<?>>();
+
+ @SuppressWarnings("unchecked")
+ public static <T> T newInstance(Class<T> theClass) {
Review Comment:
I tested 0.16.0 has no problem. A little strange.
> Add interface layer between Parquet and Hadoop Configuration
> ------------------------------------------------------------
>
> Key: PARQUET-2347
> URL: https://issues.apache.org/jira/browse/PARQUET-2347
> Project: Parquet
> Issue Type: Improvement
> Components: parquet-mr
> Reporter: Atour Mousavi Gourabi
> Assignee: Atour Mousavi Gourabi
> Priority: Minor
> Fix For: 1.14.0
>
>
> Parquet relies heavily on a few Hadoop classes, such as its Configuration
> class, which is used throughout Parquet's reading and writing logic. If we
> include our own interface for this, this could potentially allow users to use
> Parquet's readers and writers without the Hadoop dependency later on.
> In order to preserve backward compatibility and avoid breaking downstream
> projects, the constructors and methods using Hadoop's constructor should be
> preserved for the time being, though I would favour deprecation in the near
> future.
> This is part of an effort that has been [discussed on the dev mailing
> list|https://lists.apache.org/thread/4wl0l3d9dkpx4w69jx3rwnjk034dtqr8].
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