ParquetPropertiesThreadSafetyTest.java

/*
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 * 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
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 *
 *   http://www.apache.org/licenses/LICENSE-2.0
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package org.apache.parquet.column;

import static org.junit.Assert.assertNotSame;

import java.lang.reflect.Field;
import org.apache.parquet.column.values.factory.ValuesWriterFactory;
import org.junit.Test;

public class ParquetPropertiesThreadSafetyTest {

  @Test
  public void testBuilderValuesWriterFactoryNotShared() throws Exception {
    ParquetProperties.Builder builder1 = ParquetProperties.builder();
    ParquetProperties.Builder builder2 = ParquetProperties.builder();
    ParquetProperties.Builder builder3 = ParquetProperties.builder();

    Field factoryField = ParquetProperties.Builder.class.getDeclaredField("valuesWriterFactory");
    factoryField.setAccessible(true);

    ValuesWriterFactory factory1 = (ValuesWriterFactory) factoryField.get(builder1);
    ValuesWriterFactory factory2 = (ValuesWriterFactory) factoryField.get(builder2);
    ValuesWriterFactory factory3 = (ValuesWriterFactory) factoryField.get(builder3);

    assertNotSame("Builder instances should not share ValuesWriterFactory instances", factory1, factory2);
    assertNotSame("Builder instances should not share ValuesWriterFactory instances", factory2, factory3);
    assertNotSame("Builder instances should not share ValuesWriterFactory instances", factory1, factory3);
  }
}