Github user dongjoon-hyun commented on a diff in the pull request: https://github.com/apache/spark/pull/22768#discussion_r226455012 --- Diff: sql/core/src/test/java/test/org/apache/spark/sql/JavaBeanWithArraySuite.java --- @@ -0,0 +1,168 @@ +/* + * 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 test.org.apache.spark.sql; + +import java.util.ArrayList; +import java.util.Arrays; +import java.util.List; + +import org.junit.After; +import org.junit.Assert; +import org.junit.Before; +import org.junit.Test; + +import org.apache.spark.sql.Dataset; +import org.apache.spark.sql.Encoder; +import org.apache.spark.sql.Encoders; +import org.apache.spark.sql.test.TestSparkSession; +import org.apache.spark.sql.types.*; + +public class JavaBeanWithArraySuite { + + private static final List<Record> RECORDS = new ArrayList<>(); + + static { + RECORDS.add(new Record(1, Arrays.asList(new Interval(111, 211), new Interval(121, 221)))); + RECORDS.add(new Record(2, Arrays.asList(new Interval(112, 212), new Interval(122, 222)))); + RECORDS.add(new Record(3, Arrays.asList(new Interval(113, 213), new Interval(123, 223)))); + } + + private TestSparkSession spark; + + @Before + public void setUp() { + spark = new TestSparkSession(); + } + + @After + public void tearDown() { + spark.stop(); + spark = null; + } + + @Test + public void testBeanWithArrayFieldDeserialization() { + + Encoder<Record> encoder = Encoders.bean(Record.class); + + Dataset<Record> dataset = spark + .read() + .format("json") + .schema(createSchema()) + .load("src/test/resources/test-data/with-array-fields.json") + .as(encoder); + + List<Record> records = dataset.collectAsList(); + Assert.assertEquals(records, RECORDS); + } + + private StructType createSchema() { --- End diff -- So, this is back inevitably. :)
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