content: /*
   * 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.arrow.adapter.jdbc.h2;
  
  import static org.junit.jupiter.api.Assertions.assertFalse;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  import java.io.IOException;
  import java.sql.SQLException;
  import java.util.Arrays;
  import java.util.stream.Stream;
  import org.apache.arrow.adapter.jdbc.AbstractJdbcToArrowTest;
  import org.apache.arrow.adapter.jdbc.JdbcToArrowTestHelper;
  import org.apache.arrow.adapter.jdbc.Table;
  import org.apache.arrow.memory.RootAllocator;
  import org.apache.arrow.vector.VectorSchemaRoot;
  import org.junit.jupiter.params.ParameterizedTest;
  import org.junit.jupiter.params.provider.Arguments;
  import org.junit.jupiter.params.provider.MethodSource;
  
  /**
   * JUnit Test Class which contains methods to test JDBC to Arrow data conversion functionality for
   * (non-)optional columns, in particular with regard to the ensuing VectorSchemaRoot's schema.
   */
  public class JdbcToArrowOptionalColumnsTest extends AbstractJdbcToArrowTest {
    private static final String[] testFiles = {"h2/test1_null_and_notnull.yml"};
  
    /**
     * Get the test data as a collection of Table objects for each test iteration.
     *
     * @return Collection of Table objects
     * @throws SQLException on error
     * @throws ClassNotFoundException on error
     * @throws IOException on error
     */
    public static Stream<Arguments> getTestData()
        throws SQLException, ClassNotFoundException, IOException {
      return Arrays.stream(prepareTestData(testFiles, JdbcToArrowOptionalColumnsTest.class))
          .map(Arguments::of);
    }
  
    /**
     * Test Method to test JdbcToArrow Functionality for dealing with nullable and non-nullable
     * columns.
     */
    @ParameterizedTest
    @MethodSource("getTestData")
    @Override
    public void testJdbcToArrowValues(Table table)
        throws SQLException, IOException, ClassNotFoundException {
      this.initializeDatabase(table);
  
      testDataSets(sqlToArrow(conn, table.getQuery(), new RootAllocator(Integer.MAX_VALUE)), false);
    }
  
    /**
     * This method calls the assert methods for various DataSets. We verify that a SQL `NULL` column
     * becomes nullable in the VectorSchemaRoot, and that a SQL `NOT NULL` column becomes
     * non-nullable.
     *
     * @param root VectorSchemaRoot for test
     * @param isIncludeMapVector is this dataset checks includes map column. Jdbc type to 'map'
     *     mapping declared in configuration only manually
     */
    @Override
    public void testDataSets(VectorSchemaRoot root, boolean isIncludeMapVector) {
      JdbcToArrowTestHelper.assertFieldMetadataIsEmpty(root);
  
      assertTrue(root.getSchema().getFields().get(0).isNullable());
      assertFalse(root.getSchema().getFields().get(1).isNullable());
    }
  }
  